Cisco CRS Routers 16-Slot Line Card Chassis Installation Guide
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There are two options for power systems: the fixed configuration power system and the modular configuration power system.
Power components are not interchangeable between the fixed and modular configuration power system.
Fixed configuration power system
Consists of two power shelves, DC power entry modules (PEMs) or AC rectifiers, and alarm modules. It is available in versions
for DC and AC power supplies. The AC version requires either 3-phase AC-Delta or 3-phase AC-Wye input power to the power shelves.
It provides power sharing across power zones. The fixed configuration power system includes SNMP MIBS and XML support.
Modular configuration power system
Consists of two power shelves, AC or DC power modules (PMs), and alarm modules. It is available in versions for DC and AC
power supplies. However, unlike the fixed configuration power system, the AC version of the modular configuration power system
requires single-phase AC input power to the power shelves; there is no 3-phase AC-Wye or AC-Delta. If you have 3-phase AC
Delta or AC Wye at your equipment, a Cisco CRS power distribution unit (PDU)
will be required to convert 3-phase AC input power to single-phase AC input power for the power shelf. At the shelf level,
the power system provides 2N redundancy; the PMs themselves provide load-share redundancy. The modular configuration power
system also includes SNMP MIBS and XML support.
Note
In a modular configuration AC power system, PDU refers to the Cisco CRS PDU
which is required to convert 3-phase AC-Wye or AC-Delta input power to single-phase AC input power for the modular configuration
AC power shelf. For further information, see the
Cisco CRS 3-Phase AC Power Distribution Unit Installation Guide
.
Power Component
Information Common to the Two Types of Power Systems
This section
introduces information shared by the fixed configuration power components and
the modular configuration power components in the following topics:
Basic Chassis Power Details
Bonding and Grounding Guidelines
DC Power Systems
AC Power Systems
Basic Chassis Power
Details
The LCC can be
configured with either an AC-input power subsystem or a DC-input power
subsystem. Site power requirements differ, depending on the source voltage
used. Follow these precautions and recommendations when planning power
connections to the router:
Check the power at your site before
installation and periodically after installation to ensure that you are
receiving clean power. Install a power conditioner, if necessary.
Install proper grounding to avoid
damage from lightning and power surges.
The LCC requires that
at least one power shelf and its components be installed to operate properly;
however, if you install only one power shelf and its components, your system
will not be 2N redundant.
Two types of power
shelves exist: an AC shelf and a DC shelf. A fixed configuration AC power shelf
houses the AC rectifiers, while a fixed configuration DC power shelf houses the
DC PEMs. A modular configuration AC power shelf houses the AC PMs, while a
modular configuration DC power shelf houses the DC PMs. It is required that you
use only one type of power shelf in a chassis at a time.
Note
In a modular
configuration power system, both AC and DC power supplies are referred to as
power modules (PMs).
Caution
The chassis
might have more than one power connection. All connections must be removed to
de-energize the chassis.
Statement 1028
Bonding and
Grounding Guidelines
The router chassis
has a safety earth ground connection in conjunction with power cabling to the
fixed configuration power shelves. The chassis allows you to connect the
central office ground system or interior equipment grounding system to the
bonding and grounding receptacles on the router chassis, when either a fixed or
modular configuration power system is installed. Two threaded ground inserts
are located on top of the chassis rear (MSC) side panel to the left of the
lower power shelf. The following figure shows the NEBS and grounding points on
the rear (MSC) side of the chassis with a modular configuration DC power shelf
installed. This grounding point is also referred to as the network equipment
building system (NEBS) bonding and grounding stud. The location of the
grounding points on the LCC is the same for both fixed and modular
configuration power systems.
Note
These bonding and
grounding receptacles are provided to satisfy the Telcordia NEBS requirements
for bonding and grounding connections.
1
Chassis
ground cable
2
NEBS
bonding and grounding points
Note
The previous
figure shows a 45-degree grounding. A 180-degree (straight) grounding lug can
also be used.
Caution
Do not remove the
chassis ground cable unless the chassis is being replaced.
The grounding points
are hidden by a cover plate. When the cover plate is removed, you can easily
see the labels indicating the location of the grounding points. Two grounding
points are provided; use the top grounding point for NEBS grounding purposes.
Modular configuration
power shelf grounding is accomplished by installing an external ground bracket
between the power shelves and attached to the chassis, as shown in the next
figure. The bolts that connect the external grounding brackets to the chassis
and the power shelf have a torque value of 30 in.-lb (3.39 N-m). See
Installing_Power_Shelf_Grounding_Brackets
for more information about installing power shelf grounding brackets.
1
Chassis
ground cable
5
Two M6 hex
nuts attaching grounding L-bracket to shelf grounding bracket
2
Two M6 hex
bolts attaching ground lug to chassis
6
Grounding
L-bracket
3
Shelf
grounding bracket
7
Four M6 hex
bolts attaching shelf grounding bracket to power shelves
4
Two M6 hex
bolts attaching grounding L-bracket to chassis
Installing the Chassis Ground Cable
This section describes how to install the ground cable on the LCC.
Prerequisites
To ensure a
satisfactory ground connection, you need the following parts:
One grounding lug that has two M6
bolt holes with 0.63 inches (5/8 inch) (1.60 cm) of spacing center to center
between them and a 6 AWG or larger multi strand copper wire. The grounding lug
used can be either a 180 degree (straight) lug or a 45-degree lug.
Two M6 hex head bolts and integrated
locking washers are pre-installed on the chassis.
Although we
recommend at least 6 AWG multistrand copper ground cable, the actual cable
diameter and length depends on the router location and site environment. This
cable is not available from Cisco Systems; it is available from any commercial
cable vendor. The cable should be sized according to local and national
installation requirements.
Note
The DC return of
this system should remain isolated from the system frame and chassis (DC-I:
Isolated DC Return).
Required Tools and Equipment
Ground lug
Ground cable
Crimping tool and lug specific die
10-mm 6 pt. combination wrench
Torque wrench with 10-mm 6 pt. socket and rated accuracy at 30 in.-lb (3.39 N-m)
Steps
To attach the
ground cable to the chassis, follow these steps:
SUMMARY STEPS
Use the
crimping tool mandated by the lug manufacturer to crimp the lug to the ground
cable.
Using the 10-mm
wrench, attach the ground cable to the grounding point on top of the chassis
rear (MSC) side panel, as shown
Figure
2-1. Then use the torque wrench to tighten to a torque of 30 in.-lb
(3.39 N-m).
DETAILED STEPS
Step 1
Use the
crimping tool mandated by the lug manufacturer to crimp the lug to the ground
cable.
Step 2
Using the 10-mm
wrench, attach the ground cable to the grounding point on top of the chassis
rear (MSC) side panel, as shown
Figure
2-1. Then use the torque wrench to tighten to a torque of 30 in.-lb
(3.39 N-m).
DC Power Systems
Each DC powered chassis contains two DC power shelves for 2N redundancy. The shelves contain the input power connectors.
In the fixed configuration power system, each power shelf contains three DC PEMs. The power shelves and DC PEMs are field
replaceable. Each DC PEM has its own circuit breaker.
In the modular configuration power system, each shelf can accept up to eight DC PMs. The power shelves and DC PMs are field
replaceable.
Note
Depending on the hardware deployed at your site, your system may not consume the maximum power supplied by the power system.
Fixed Configuration
DC Power
The LCC fixed
configuration DC power system provides 13,200 watts to power the chassis.
Due to its power
zones, the LCC using fixed configuration power requires a total of twelve
dedicated 60 Amp DC input power connections, two for each DC PEM, to provide
redundant DC power to all six power zones. We recommend that you have two
separate, redundant –48 VDC power battery sources to provide power to the LCC.
Connect the six “A" 60 Amp DC inputs to the upper power shelf (PS0 in Figure
1-4) to one battery, and the six “B” 60 Amp inputs to the lower power shelf
(PS1 in Figure 1-4) to the other battery.
At sites where the
LCC is equipped with a DC-input power supply shelf and DC PEMs, observe the
following guidelines:
All power connection wiring
should follow the rules and regulations in the National Electrical Code (NEC)
and any local codes.
Each DC-input PEM connection
is rated at 60 A maximum. A dedicated, commensurately rated DC power source is
required for each PEM connection.
For DC power cables, we recommend
that you use commensurately rated, high-strand-count copper cable. Each DC PEM
requires two DC inputs of nominal –48/–60 VDC, 60 A service. Each DC input
consists of one pair of cable leads, source DC (–) and source DC return (+).
Each power shelf requires one grounding cable. The length of the cables depends
on the router location. These cables are not available from Cisco Systems; they
are available from any commercial vendor.
DC power cables must be terminated by
cable lugs at the power shelf end. The lugs should be dual hole and able to fit
over M6 terminal studs at 0.63 in. (5/8 in.) (1.60 cm) centers (for example,
Panduit part number LCD2-14A-Q), as shown in the next figure.
Maximum wire size
at the DC input terminal block is 2 AWG.
The next figure shows
a typical source DC power distribution scheme. The ground cable is to the far
left on the shelf. The DC terminal block cable connector screws have a 20
in.-lb (2.26 N-m) value; the power shelf ground cable connector screws have a
30 in.-lb (3.39 N-m) torque value.
The color coding of
the source DC power cable leads depends on the color coding of the site DC
power source. Typically, green or green and yellow indicates that the cable is
a ground cable. Follow your local practices for cable color code and markings.
Ensure that the power cables are connected to the DC input power shelf terminal
studs in the proper positive (+) polarity and negative (–) polarity.
Sometimes, the source
DC cable leads might have a positive (+) or a negative (–) label, but you must
verify the polarity by measuring the voltage between the DC cable leads. When
making the measurement, the positive (+) lead and the negative (–) lead must
always match the (+) and (–) labels on the power shelf.
Caution
The DC input PEM
contains circuitry to trip the breaker on the PEM if it detects a reverse
polarity condition. When installing DC power cables, make sure that the
polarity of the DC input wiring is correct.
This figure shows the
cable wiring for the fixed configuration power shelf.
The table lists the
fixed configuration DC input current and voltage specifications.
Table 1. DC Input Current
and Voltage Information
Nominal input
voltage
–48 VDC North
America–60 VDC European Community(range: –42 VDC to –75 VDC)
Input line
current
50 A maximum
at –48 VDC40 A maximum at –60 VDC
Inrush
current
168 A peak at
–75 VDC(maximum for 1 ms)
Each wiring block on
the fixed configuration power shelf contains two sets of terminals, one
positive and one negative, and is covered by a plastic block cover that snaps
onto the power shelf and is secured by a screw to a torque value of 4 to 5
in.-lb (0.46 to 0.58 N-m). You must remove the block cover or rotate it out of
the way before you work with the cables. The block covers are slotted in such a
way that the cables can exit only one end. For the cables to point in a
different direction, remove the block cover, rotate it, and snap it back on.
Modular
Configuration DC Power
The LCC modular
configuration DC power system can provide up to 16,800 watts to power the
chassis. However, by default, the power capability of a system when shipped,
with six DC PMs per power shelf, is 12,600 watts.
Note
Depending on the
hardware deployed at your site, your system may not consume the maximum power
supplied by the power system.
Each modular
configuration DC power shelf supports up to eight DC PMs. The power shelves and
DC PMs are field replaceable.
Note
Although each
modular configuration DC power shelf can support up to eight DC PMs, the
modular configuration DC power shelf is shipped with six DC PMs per shelf.
This figure shows the
cable wiring for the modular configuration power shelf.
Each power shelf
operates with up to eight DC inputs of –48/–60 VDC (nominal), 60A. The power
shelf accepts input DC power in the range –40 to –72 VDC.
This table lists the
modular configuration DC input current and voltage specifications.
Table 2. DC Input Current
and Voltage Information
Nominal input
voltage
–48 VDC North
America–60 VDC European Community(range: –40 VDC to –72 VDC)
Input line
current
50 A maximum
at –48 VDC40 A maximum at –60 VDC60 A maximum at –40 VDC
Each wiring block on
the modular configuration DC power shelf contains two sets of terminals, one
positive and one negative, and is covered by a plastic terminal block cover
that is secured by a screw to a torque of 5 to 7 in.-lb (0.56 to 0.79 N-m).
Each DC power cable is connected to the power shelf with a torque of 20 in.-lb
(2.26 N-m). Maximum wire size at the DC input terminal block is 2 AWG.
The power supply
terminal posts are centered 0.63 inches (5/8 inch) (1.60 cm) apart and are
M6-threaded. We recommend that you use an appropriately sized 180-degree angle
(straight) industry standard 2-hole, standard barrel compression lug, as shown
in this figure.
The power shelf
grounding is accomplished by installing an external ground bracket between the
power shelves and attached to the chassis. The bolts that connect the external
grounding brackets to the chassis and the power shelf have a torque value of 30
in.-lb (3.39 N-m).
Input-Power-Present
LEDs
In both power
configurations, the DC input-power-present LEDs provide a visual indication to
service personnel that there is voltage present across the input terminal
connection. The LED provides a warning to the service person that there is
power present.
Note
Power should be
disconnected before servicing the input power connection.
This figure shows the
input-power-present LEDs on the rear of the fixed configuration DC power shelf.
This figure shows the
input-power-present LEDs on the rear of the modular configuration DC power
shelf.
The
input-power-present LED starts to light up when the input voltage reaches –20
VDC and the LED gets brighter as voltage increases; the input-power-present LED
is fully lit when the input voltage reaches –38 VDC.
Caution
If the input
voltage polarity is reversed, or if the LED circuit fails, the LED will not
light. When this is the case, service personnel should check for hazardous
voltages before working on the unit.
AC Power Systems
Each AC powered chassis contains two AC power shelves for 2N redundancy. The shelves contain the input power connectors.
In the fixed configuration power system, each shelf contains three AC power rectifiers. The power shelves and AC power rectifiers
are field replaceable. Each shelf and AC power rectifier has its own circuit breaker.
In the modular configuration power system, each shelf can contain up to six AC PMs. The power shelves and the AC PMs are field
replaceable.
Note
Depending on the hardware deployed at your site, your system may not consume the maximum power supplied by the power system.
Fixed Configuration AC Power
The LCC fixed configuration AC power system provides 13,200 watts to power the chassis.Two versions of the 3-phase AC power
shelf are available to provide either an AC Delta or an AC Wye input configuration. Each of the AC power shelf versions has
a different Cisco part number to distinguish the Wye from the Delta configuration. The AC connections to the LCC are made
to terminal blocks on the AC power shelves that have been hard wired for a Wye or Delta configuration. All chassis should
have two power shelves of the same type, that is, two Delta or two Wye AC power shelves.
In the fixed configuration power system, each shelf supports three AC-to-DC rectifiers that are field replaceable. The AC-to-DC
rectifiers convert 200-to-240 VAC power to –54 VDC used by the LCC.
The AC Wye power shelf has a Wye 3-phase, 5-wire connection: 200 to 240 (L-N)/346 to 415 (L-L) VAC, 3W+N+PE, 50 to 60 Hz,
25 A. For redundant operation, two 3-phase Wye branch circuits are required: 40 A (North America) or 32 A (International).
One power connection is required for each power shelf.
The AC Delta power shelf has a Delta 3-phase, 4-wire connection: 200 to 240 VAC, 3-phase, 3W+PE, 50 to 60 Hz, 42 A. For redundant
operation, two 3-phase Delta 60-A branch circuits are required. One power connection is required for each power shelf.
Note
The power cord for the fixed configuration AC power shelf does not arrive preattached and needs to be installed.
Modular Configuration AC Power
The LCC modular configuration AC power system can provide up to 18,000 watts to power the chassis. However, by default, the
power capability of a system when shipped, with 5 AC PMs per power shelf, is 15,000 watts.
Each modular configuration power shelf supports up to six PMs. The power shelves and PMs are field replaceable.
Note
Depending on the hardware deployed at your site, your system may not consume the maximum power supplied by the power system.
Unlike the fixed configuration AC power system, which requires 3-phase AC Delta or AC Wye input power, the modular configuration
AC power system requires single-phase AC input power. If you have 3-phase AC Delta or AC Wye at your equipment, a Cisco CRS PDU
will be required to convert 3-phase AC input power to single-phase AC input power for the power shelf. For more information,
see the
Cisco CRS 3-Phase AC Power Distribution Unit Installation Guide
.
The modular configuration AC power shelf has the following input VAC power requirements:
Single-phase, 200 to 240 VAC nominal, 50 to 60 Hz, 16 A.
Each power shelf contains six IEC-320-C22 receptacles which can accept up to six IEC-320-C21 connector female cords.
Note
If you have a Cisco CRS 3-Phase AC PDU installed, six AC PMs are required to be installed in each LCC AC modular configuration
power shelf to maintain a balanced 3-phase power load,.
Note
We recommend that you use appropriate short-circuit protection in compliance with national and local electrical codes.
Installing and
Remove Fixed Configuration Power Components
This section contains
the following procedures:
Installing a Fixed Configuration Power Shelf
Removing a Fixed Configuration Power Shelf
Installing Fixed Configuration AC Power Cords
Removing Fixed Configuration AC Power Cords
Installing Fixed Configuration DC Power Shelf Wiring
Removing Fixed Configuration DC Power Shelf Wiring
Installing an AC Rectifier or DC PEM
Removing an AC rectifier or DC PEM
Installing a Fixed Configuration Alarm Module
Removing a Fixed Configuration Alarm Module
Powering Up and Down a Chassis with Fixed Configuration AC Power
Power Up and Power Down a Chassis with Fixed Configuration DC Power
Converting from One Fixed Configuration Power System to Another
This section
describes how to install a fixed configuration power shelf in the LCC. For
information on the differences between the power types, see
DC
Power Systems and
AC
Power Systems.
The power shelf
encloses:
The power modules: three AC
rectifiers for an AC power shelf or three DC PEMs for a DC power shelf
An alarm module
Power distribution
connections and wiring.
The power shelf is
installed in the LCC from the front (PLIM) side. Although differences exist
among the different power shelf types (AC Wye, AC Delta, and DC), they are
installed in the same manner. This figure shows a fixed configuration AC power
shelf. The fixed configuration DC power shelf is similar.
1
Lever
handle captive screws
3
Power shelf
captive screws
2
Lever
handle (left handle shown)
4
Power shelf
I/O switch
Prerequisites
Before performing this task, remove the upper grille on the front (PLIM) side of the chassis (if installed).
Note
Do not install the power shelf in the chassis with DC PEMs, AC rectifiers, or alarm module installed in the power shelf.
Required Tools and Equipment
You need the following tools and part to perform this task:
ESD-preventive wrist strap
1/4-in. x 6-in. long slotted screwdriver
Fixed configuration AC or DC power shelf
AC Delta power shelf (Cisco product number CRS-16-LCC-PS-ACD=), or
AC Wye power shelf (Cisco product number CRS-16-LCC-PS-ACW=), or
DC power shelf (Cisco product number CRS-16-LCC-PS-DC=)
Steps
To install a fixed
configuration power shelf, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Make sure that
the power shelf I/O switch, located on the front (PLIM) side of the chassis, is
in the OFF position.
The lever
handles are fastened down for shipment. Use the screwdriver to turn the two
captive screws, one on each lever handle, to unfasten them.
Supporting the
unit by the bottom and grasping one side for balance, lift the power shelf up
and slide it into one of the power shelf slots on the chassis.
Slide the power
shelf fully into the chassis and lift the lever handles up to lock the tray
into position.
Use the
screwdriver to turn the two lever screws on the front panel of the power shelf
clockwise to seat the power shelf firmly in the slot.
Use the
screwdriver to turn the four captive screws on the interior of the power shelf
clockwise to firmly anchor the shelf to the sides of the chassis.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Make sure that
the power shelf I/O switch, located on the front (PLIM) side of the chassis, is
in the OFF position.
Step 3
The lever
handles are fastened down for shipment. Use the screwdriver to turn the two
captive screws, one on each lever handle, to unfasten them.
Step 4
Supporting the
unit by the bottom and grasping one side for balance, lift the power shelf up
and slide it into one of the power shelf slots on the chassis.
Caution
An empty
power shelf weighs approximately 36 lb (16.3 kg). Because of the rack-mounted
height of the chassis, you should be especially careful while lifting and
removing the power shelf. To prevent injury, keep your back straight and lift
with your legs, not your back. Avoid sudden twists or lateral moves. It is
safer to use two people and a ladder to install or remove the power shelf
rather than a single person.
Step 5
Slide the power
shelf fully into the chassis and lift the lever handles up to lock the tray
into position.
Step 6
Use the
screwdriver to turn the two lever screws on the front panel of the power shelf
clockwise to seat the power shelf firmly in the slot.
Step 7
Use the
screwdriver to turn the four captive screws on the interior of the power shelf
clockwise to firmly anchor the shelf to the sides of the chassis.
This section
describes how to remove a power shelf from the 16-slot LCC. For information on
the differences between the power types, see
DC
Power Systems and
AC
Power Systems.
The power shelf is
installed and removed from the front (PLIM) side and plugs into the chassis
power interface connector panel. Although differences exist among the different
power shelf types (AC Wye, AC Delta, and DC), they are installed and removed in
the same manner.
Figure
2-11 shows a fixed configuration AC power shelf.
You need the following tools to perform this task:
ESD-preventive wrist strap
1/4-in. x 6-in. long slotted screwdriver
Steps
To remove a fixed
configuration AC or DC power shelf, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Turn the shelf
power switch, located on the front (PLIM) side of the chassis, to the OFF
position.
For AC, at the
AC service circuit breaker box open all associated equipment circuit breakers
for shelf(s) to be removed. Use the lockout and tag procedures per your local
practices. Unplug the power cords from the associated power shelves and remove.
See
Removing
Fixed Configuration AC Power Cords for more information.
Remove all
power modules (three AC power rectifiers in an AC power shelf or three DC PEMs
in a DC power shelf) from the shelf you are removing.
Remove the
alarm module.
Use the
screwdriver to loosen the four captive screws (two on each side) on the
interior of the power shelf by turning them counterclockwise.
Use the
screwdriver to loosen the two lever screws on the front panel of the power
shelf by turning them counterclockwise.
Pull the lever
handles down with both hands and slide the power shelf slowly from the slot in
the chassis. After partially removing the power shelf from the chassis using
the handles, grab both side of the power shelf and slide the shelf completely
from the chassis.
Set the power
shelf carefully aside.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Turn the shelf
power switch, located on the front (PLIM) side of the chassis, to the OFF
position.
Step 3
For AC, at the
AC service circuit breaker box open all associated equipment circuit breakers
for shelf(s) to be removed. Use the lockout and tag procedures per your local
practices. Unplug the power cords from the associated power shelves and remove.
See
Removing
Fixed Configuration AC Power Cords for more information.
For DC, at the
BDFB or power plant, remove the associated fuses / circuit breakers for
shelf(s) to be removed. Use the lockout and tag procedures per your local
practices. Remove DC distribution cables from the rear of the associated power
shelf and tape the bare lugs for protection. See
Removing
Fixed Configuration DC Power Shelf Wiring for more information.
Step 4
Remove all
power modules (three AC power rectifiers in an AC power shelf or three DC PEMs
in a DC power shelf) from the shelf you are removing.
Step 5
Remove the
alarm module.
Step 6
Use the
screwdriver to loosen the four captive screws (two on each side) on the
interior of the power shelf by turning them counterclockwise.
Step 7
Use the
screwdriver to loosen the two lever screws on the front panel of the power
shelf by turning them counterclockwise.
Step 8
Pull the lever
handles down with both hands and slide the power shelf slowly from the slot in
the chassis. After partially removing the power shelf from the chassis using
the handles, grab both side of the power shelf and slide the shelf completely
from the chassis.
Caution
An empty
power shelf weighs approximately 36 lb (16.3 kg). Because of the rack-mounted
height of the chassis, you should be especially careful while lifting and
removing the power shelf. To prevent injury to your back, keep your back
straight while lifting the shelf and lift the equipment as you stand up. Avoid
sudden twists or lateral moves. It is safer to have two people use a ladder to
install or remove the power shelf rather than do it yourself.
This section describes how to install the AC Wye and AC Delta power cord in the fixed configuration power system.
Prerequisites
Before performing this task, ensure that both power shelves are installed in the chassis. Remove the upper air grille on the
rear [MSC] side of the chassis (if installed).
Note
Before installing the AC power cord on the power shelf, make sure that the AC power cord is not plugged into the facility
power.
Required Tools and Equipment
You need the following tools to perform this task:
ESD-preventive wrist strap
10-mm socket wrench
Stripping tool to remove power cable conductor insulation
1/4-in. x 6-in. long slotted screwdriver
Torque screwdriver with 1/4-in. slotted head and rated accuracy at 9 in-lb (1.04 N-m)
Torque wrench with 10-mm 6 pt. socket and rated accuracy at 20 in.-lb (2.26 N-m)
AC Wye Power
Shelf
The AC Wye power
shelf arrives with a 5-wire Wye cord and an IEC 60309 plug rated 415 V/32 A,
IP44, 3W+N+PE; it is 4 meters long. The power shelf has five corresponding
terminations: three active (hot), one neutral, and one ground. The ground lug
and terminal block are located behind a removable cover on the rear of the
power shelf. The terminal block contains four terminations to attach the three
active cable conductors and one neutral cable conductor from the input power
cord. The ground cable conductor from the input power cord is attached to the
ground lug.
The rear of the AC
Wye power shelf with the rear cover removed is shown in this figure.
1
Lead 1 (L1)
4
Lead 4 (L4,
neutral)
2
Lead 2 (L2)
5
Ground
3
Lead 3 (L3)
Note
Leads 1, 2, and 3
(L1, L2, and L3) are not associated with any particular color of cable
conductor because they are not connected to neutral (L4) or the safety ground
(L5).
Note
We recommend that
you rotate the L1, L2, and L3 cable conductor connection for the two power
shelves to improve system availability due to common phase outage.
Note
The ground cable
conductor connector nuts have a 20 in.-lb (2.26 N-m) torque value, and the
power cable conductor connector screws on the terminal block have a 9 in.-lb
(1.04 N-m) torque value.
AC Delta Power
Shelf
The AC Delta power
shelf arrives with a 4-wire Delta cord and an IEC 60309 plug rated 250 V/60 A,
IP67, 3W+PE; it is 4 meters long. The power shelf has four corresponding
terminations: three active (“hot”) and one ground. The ground lug and terminal
block are located behind a removable cover on the rear of the power shelf. The
terminal block contains three terminations to attach the three active cable
conductors from the input power cord. The ground cable conductor from the input
power cord is attached to the ground lug.
The rear of the AC
Delta power shelf with the rear cover removed is shown in this figure.
1
Lead 1 (L1)
3
Lead 3 (L3)
2
Lead 2 (L2)
4
Ground
Note
Leads 1, 2, and 3
(L1, L2, and L3) are not associated with any particular color of cable
conductor because they are not connected to neutral or the safety ground (4).
Note
We recommend that
you rotate the L1, L2, and L3 cable conductor connection for the two power
shelves to improve system availability due to common phase outage.
Note
The ground cable
conductor connector screws have a 20 in.-lb (2.26 N-m) torque value, and the
power cable conductor connector screws on the terminal block have a 9 in.-lb
(1.04 N-m) torque value.
Steps
To wire a fixed
configuration AC power shelf, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
For AC Wye
only, choose the neutral cable conductor; white is usually neutral. Be sure to
perform a continuity check with a volt meter to verify that the neutral pin
(labeled N on the plug) is connected to the neutral cable conductor.
Perform a
continuity check with a volt meter to verify that the pins on the plug (L1, L2
and L3) are correctly connected to the corresponding cable conductor(L1, L2 and
L3). Perform a continuity check with a volt meter to verify that the ground pin
is connected to the ground cable conductor.
Remove the rear
cover from the power shelf.
The shelf
arrives with two wiring holes for the power cord. Choose the wiring hole for
the cord and remove the knock-out plug, if needed.
Ensure that the
insulating layer has been removed from the cable conductor ends.
Insert the AC
power cord and tighten the cable bushing lock nut.
Remove the M6
nut from the ground connection (green cable conductor is typically ground),
attach the ground cable conductor, and tighten the nut (ground cable conductor
has a closed-ring connector) to a torque value of 20 in.-lb (2.26 N-m).
For AC Wye
only, connect the neutral cable conductor to the terminal block by backing out
the left-side terminal block screw, inserting the cable conductor, and
tightening the screw to a torque value of 9 in.-lbs (1.04 N-m). Do not loosen
the screw on the right side of the terminal block.
For AC Delta
and AC Wye, connect the three active cable conductors by backing out the
left-side terminal block screw, inserting the cable conductor, and tightening
the screw to a torque value of 9 in.-lbs (1.04 N-m). Do not loosen the screw on
the right side of the terminal block.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
For AC Wye
only, choose the neutral cable conductor; white is usually neutral. Be sure to
perform a continuity check with a volt meter to verify that the neutral pin
(labeled N on the plug) is connected to the neutral cable conductor.
Step 3
Perform a
continuity check with a volt meter to verify that the pins on the plug (L1, L2
and L3) are correctly connected to the corresponding cable conductor(L1, L2 and
L3). Perform a continuity check with a volt meter to verify that the ground pin
is connected to the ground cable conductor.
Step 4
Remove the rear
cover from the power shelf.
Step 5
The shelf
arrives with two wiring holes for the power cord. Choose the wiring hole for
the cord and remove the knock-out plug, if needed.
Step 6
Ensure that the
insulating layer has been removed from the cable conductor ends.
Step 7
Insert the AC
power cord and tighten the cable bushing lock nut.
Step 8
Remove the M6
nut from the ground connection (green cable conductor is typically ground),
attach the ground cable conductor, and tighten the nut (ground cable conductor
has a closed-ring connector) to a torque value of 20 in.-lb (2.26 N-m).
Step 9
For AC Wye
only, connect the neutral cable conductor to the terminal block by backing out
the left-side terminal block screw, inserting the cable conductor, and
tightening the screw to a torque value of 9 in.-lbs (1.04 N-m). Do not loosen
the screw on the right side of the terminal block.
Note
Be careful
not to back the connection screws too far or they fall out.
Step 10
For AC Delta
and AC Wye, connect the three active cable conductors by backing out the
left-side terminal block screw, inserting the cable conductor, and tightening
the screw to a torque value of 9 in.-lbs (1.04 N-m). Do not loosen the screw on
the right side of the terminal block.
This section describes how to remove the AC Wye and AC Delta power cords from the fixed configuration power shelf.
Prerequisites
Before performing this task, power down and remove AC rectifiers and the alarm module in the shelf you want to disconnect.
Remove the upper grille form the rear (MSC) side of the chassis, if installed.
Note
Before removing AC power cord from the power shelf, make sure that the AC power cord is not plugged into the facility power.
Required Tools and Equipment
ESD-preventive wrist strap
3/8-in. ratchet wrench with 10-mm socket
1/4-in. x 6-in. long slotted screwdriver
AC Wye Power
Shelf
The rear of the AC
Wye power shelf with the rear cover removed is shown in
Figure 1.
For more information on AC Wye power shelf, see
AC Wye Power Shelf
section.
Note
When removing AC
wiring from the fixed configuration power shelf, be sure to remove the ground
cable conductor last.
AC Delta Power
Shelf
The rear of the AC
Delta power shelf with the rear cover removed is shown in
Figure 1.
For more information on AC Wye power shelf, see
AC Delta Power Shelf
section.
Note
When removing AC
wiring from the fixed configuration power shelf, be sure to remove the ground
cable conductor last.
Steps
To disconnect the
AC power cord from the fixed configuration AC power shelf, perform the
following:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
For AC Delta
and AC Wye, disconnect the three active cable conductors by loosening the screw
on the left side of the terminal block for each cable conductor and removing
the cable conductor.
For AC Wye
only, disconnect the neutral cable conductor by backing out the left side
terminal block screw and removing the cable conductor. White is usually
neutral.
Remove the M6
nut from the ground connection (green is typically the ground cable conductor)
and remove the ground cable conductor.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
For AC Delta
and AC Wye, disconnect the three active cable conductors by loosening the screw
on the left side of the terminal block for each cable conductor and removing
the cable conductor.
Step 3
For AC Wye
only, disconnect the neutral cable conductor by backing out the left side
terminal block screw and removing the cable conductor. White is usually
neutral.
Note
Be careful
not to back the connection screws too far or they fall out.
Step 4
Remove the M6
nut from the ground connection (green is typically the ground cable conductor)
and remove the ground cable conductor.
Installing Fixed
Configuration DC Power Shelf Wiring
This section
describes how to install the DC power shelf wiring on the fixed configuration
power shelf.
The figure shows the
cable wiring for the fixed configuration power shelf.
Note
When wiring the
power shelf, be sure to connect the ground cable first.
Prerequisites
Before performing this task, ensure that both power shelves are installed in the chassis. Remove the upper air grille on the
rear [MSC] side of the chassis, if installed.
Note
Before installing wiring on the power shelf, make sure that the input power cables are not energized.
Note
If cables are wrapped with black electrical tape, be sure to remove tape from cables before installing wiring on the power
shelf.
Required Tools and Equipment
You need the following tools to perform this task:
ESD-preventive wrist strap
3/8 in. ratchet wrench with 10-mm socket
Crimping tool and lug specific die
Multimeter
Torque wrench with 10-mm 6 pt. socket and rated accuracy at 30 in.-lb (3.39 N-m)
Torque wrench with 10-mm 6 pt. socket and rated accuracy at 20 in.-lb (2.26 N-m)
Steps
To wire the fixed
configuration DC power shelf, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Remove the
terminal block cover
Verify the
following resistance values:
Use the
crimping tool mandated by the lug manufacturer to crimp the lugs to the
DC-input cables and the power shelf ground cable. For details on lugs, see
DC
Power Systems.
Using a 10-mm
socket wrench, attach the ground cable to the ground cable terminal on the
power shelf. Then use the torque wrench to tighten to a torque of 30 in.-lb
(3.39 N-m).
Using a 10-mm
socket wrench, attach the positive and negative cables to each terminal block.
Then use the torque wrench to tighten to a torque of 20 in.-lb (2.26 N-m).
Reattach the
terminal cover with a Phillips screwdriver. Insert and tighten the screw
holding the cover to the wiring terminal block.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Remove the
terminal block cover
Step 3
Verify the
following resistance values:
The
resistance between the positive and negative power terminal studs of each input
must be greater than 90 KOhm.
The
resistance between each positive terminal stud and bare metal surface on the
power shelf must be greater than 10 MOhm.
The
resistance between each negative terminal stud and bare metal surface on the
power shelf must be greater than 10 MOhm.
Step 4
Use the
crimping tool mandated by the lug manufacturer to crimp the lugs to the
DC-input cables and the power shelf ground cable. For details on lugs, see
DC
Power Systems.
The cable
should be sized according to local and national installation requirements. Use
only copper cable.
Note
The terminal
posts are centered 0.63 inches (5/8 inch)(1.60 cm) apart and are M6-threaded.
We recommend that you use an appropriately sized 180-degree (straight) industry
standard 2-hole, standard barrel compression lug.
Step 5
Using a 10-mm
socket wrench, attach the ground cable to the ground cable terminal on the
power shelf. Then use the torque wrench to tighten to a torque of 30 in.-lb
(3.39 N-m).
Step 6
Using a 10-mm
socket wrench, attach the positive and negative cables to each terminal block.
Then use the torque wrench to tighten to a torque of 20 in.-lb (2.26 N-m).
Step 7
Reattach the
terminal cover with a Phillips screwdriver. Insert and tighten the screw
holding the cover to the wiring terminal block.
Removing Fixed Configuration DC Power Shelf Wiring
This section describes how to remove the DC power shelf wiring from the fixed configuration power shelf.
Note
When removing DC wiring from the fixed configuration power shelf, be sure to remove the ground cable last.
Prerequisites
Before performing this task, power down and remove DC PEMs and the alarm module in the shelf you want to disconnect. Remove
the upper air grille from the rear (MSC) side of the chassis., if installed
Note
Before removing wiring from the power shelf, make sure that the input power cables are not energized.
Required Tools and Equipment
ESD-preventive wrist strap
3/8-in. ratchet wrench with 10-mm socket
Steps
To disconnect
wiring from the fixed configuration DC power shelf, perform the following
steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Remove the
terminal block cover
Using the 10-mm
socket wrench, remove the positive and negative cables from each terminal
block.
Using the
wrench, remove the ground cable from the ground cable terminal.
Replace the
terminal block cover.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Remove the
terminal block cover
Step 3
Using the 10-mm
socket wrench, remove the positive and negative cables from each terminal
block.
Step 4
Using the
wrench, remove the ground cable from the ground cable terminal.
Note
When a cable
is removed from the rear of the fixed configuration DC power shelf, we
recommend that it should be wrapped with standard black electrical tape.
This section
describes how to install an AC rectifier or DC PEM in the LCC. For information
on the differences between the power types, see
DC
Power Systems and
AC
Power Systems.
The power module is
installed into the power shelf on the front (PLIM) side of the chassis.
Although differences exist among the DC PEMs and AC rectifiers (AC Wye, AC
Delta, and DC), they are installed in the same manner.
The figure shows an
AC rectifier for reference. The fixed configuration DC PEM is similar.
1
PWR OK
4
CBREAKER
TRIP
2
FLT
5
ILIM
3
AC INPUT
FAIL
6
OT
Prerequisites
Before performing this task, remove the upper grille on the front (PLIM) side of the chassis, if installed.
Required Tools and Equipment
You need the following tool and parts to perform this task:
ESD-preventive wrist strap
Fixed configuration DC PEM or AC power rectifier
DC PEM (Cisco product number CRS-16-DC-PEM=), or
AC rectifier (Cisco product number CRS-16-AC-RECT=)
Steps
To install a DC PEM
or AC rectifier in a fixed configuration power shelf, perform the following
steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Turn the AC
rectifier or DC PEM power switch to the OFF position.
While facing
the front (PLIM) side of the chassis, press the ejector lever release button at
the top of the AC rectifier or DC PEM to release the ejector lever.
Pivot the
ejector lever away from the module faceplate.
Using two hands
to support and guide the DC PEM or AC rectifier, slide it into the power supply
shelf until the connector on the back of the module just makes contact with the
connector on the backplane of the power shelf.
Seat the module
in the power shelf backplane by pivoting the ejector lever to hook the slot on
the floor of the power shelf and then pushing the ejector lever until it is
flush with the module faceplate. You hear a click when the ejector lever locks
into place.
Push the power
tab at the bottom front of the AC rectifier or DC PEM to the ON position.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Turn the AC
rectifier or DC PEM power switch to the OFF position.
Step 3
While facing
the front (PLIM) side of the chassis, press the ejector lever release button at
the top of the AC rectifier or DC PEM to release the ejector lever.
Step 4
Pivot the
ejector lever away from the module faceplate.
Step 5
Using two hands
to support and guide the DC PEM or AC rectifier, slide it into the power supply
shelf until the connector on the back of the module just makes contact with the
connector on the backplane of the power shelf.
Caution
To prevent
damage to the power shelf backplane connector, do not use excessive force when
inserting a module into its power shelf bay.
Caution
Each module
weighs about 19 lb (8.6 kg). Because of the weight of the module and the
elevated position of the power shelf, you should use two hands when handling
the module. It is safer to use two people and a ladder to install or remove the
module rather than a single person.
Step 6
Seat the module
in the power shelf backplane by pivoting the ejector lever to hook the slot on
the floor of the power shelf and then pushing the ejector lever until it is
flush with the module faceplate. You hear a click when the ejector lever locks
into place.
Step 7
Push the power
tab at the bottom front of the AC rectifier or DC PEM to the ON position.
What to do next
After performing this task, re-install the upper grille on the front
(PLIM) side of the chassis.
Removing an AC
rectifier or DC PEM
This section
describes how to remove a DC PEM or AC rectifier from the Cisco CRS 16-slot
LCC.
Although differences
exist among the DC PEMs and AC rectifiers (AC Wye, AC Delta, and DC), they are
removed in the same manner.
Figure
shows an AC rectifier for reference.
Prerequisites
Before performing this task, remove the upper grille on the front (PLIM) side of the chassis
Required Tools and Equipment
You need the following tool to perform this task:
ESD-preventive wrist strap
Steps
To remove an AC
rectifier or DC PEM, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
While facing
the front (PLIM) side of the chassis, pull the power tab on the bottom front of
the module out to the OFF position.
Press the
ejector lever release button at the top of the module to release the ejector
lever.
Pivot the
ejector lever away from the module faceplate to eject the module from the power
shelf backplane connector.
Grasp the
module handle and pull the module halfway from the bay. Be sure not to pull the
module by the ejector lever but rather by the handle only.
Be sure to
support the module while you slide the module completely from the bay, then set
the module carefully aside.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
While facing
the front (PLIM) side of the chassis, pull the power tab on the bottom front of
the module out to the OFF position.
Step 3
Press the
ejector lever release button at the top of the module to release the ejector
lever.
Step 4
Pivot the
ejector lever away from the module faceplate to eject the module from the power
shelf backplane connector.
Note
Pulling out
the ejector lever not only physically ejects the module from the power shelf
backplane connector, but also toggles an internal microswitch, shutting off
power within the module.
Step 5
Grasp the
module handle and pull the module halfway from the bay. Be sure not to pull the
module by the ejector lever but rather by the handle only.
Caution
A module
weighs about 19 lb (8.6 kg). Because of the weight of the module and the
elevated position of the power shelf, you should use two hands when handling
the module. It is safer to use two people and a ladder to install or remove the
module rather than a single person.
Step 6
Be sure to
support the module while you slide the module completely from the bay, then set
the module carefully aside.
What to do next
After performing this task, install a replacement AC rectifier or DC
PEM if necessary (see Installing an AC Rectifier or DC PEM, page 2-29) and
replace the upper grille on the front (PLIM) side of the chassis.
Installing a Fixed
Configuration Alarm Module
This section
describes how to install an alarm module in a fixed configuration power supply
in the LCC. An alarm module can be installed only in the far right slot of the
power shelf (as you are facing the front [PLIM] side of the chassis).
Each AC or DC power
shelf contains an alarm module, which monitors the status of the power shelf
and provides an external interface for system alarms. A dedicated alarm module
slot exists on the right side of every power shelf. The same alarm module is
used in all power shelves.
This figure shows a
fixed configuration alarm module.
1
External
alarm connector
3
LED display
2
Alarm LEDs
Prerequisites
Before performing this task, remove the upper grille on the front (PLIM) side of the chassis, if installed.
Required Tools and Equipment
ESD-preventive wrist strap
6-in long number 1 Phillips screwdriver
Fixed configuration alarm module (Cisco product number CRS-16-ALARM=)
Steps
To install a fixed
configuration alarm module, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Using two hands
to support and guide the alarm module, slide it into the far right bay on the
power supply shelf until the connector on the back of the alarm module makes
contact with the connector on the backplane of the shelf. Verify that the guide
pin on the chassis front panel is correctly aligned with the hole on the front
of the alarm module.
Seat the alarm
module in the power shelf backplane by pressing it firmly into the chassis
backplane connector.
Use the
screwdriver to turn the captive screw at the bottom of the alarm module
clockwise to seat the alarm module connectors in the connectors on the power
shelf interface panel.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Caution
To prevent
damage to the backplane connector on the alarm module, do not use excessive
force when inserting the alarm module into its power shelf bay.
Step 2
Using two hands
to support and guide the alarm module, slide it into the far right bay on the
power supply shelf until the connector on the back of the alarm module makes
contact with the connector on the backplane of the shelf. Verify that the guide
pin on the chassis front panel is correctly aligned with the hole on the front
of the alarm module.
Caution
The alarm
module weighs approximately 4.2 lb (2 kg). Because of the rack-mounted height
of the chassis, you should be especially careful while lifting and removing the
alarm module. Use two hands when handling the alarm module. It is safer to use
a ladder to install or remove the alarm module.
Step 3
Seat the alarm
module in the power shelf backplane by pressing it firmly into the chassis
backplane connector.
Step 4
Use the
screwdriver to turn the captive screw at the bottom of the alarm module
clockwise to seat the alarm module connectors in the connectors on the power
shelf interface panel.
What to do next
After performing this task, replace the upper grille on the front
(PLIM) side of the chassis.
Removing a Fixed
Configuration Alarm Module
This section
describes how to remove the alarm module from a fixed configuration power
supply in the LCC. The alarm module is installed only in the far right slot of
the power shelf (as you are facing the front [PLIM] side of the chassis). This
figure
shows a fixed configuration alarm module.
Prerequisites
Before performing this task, remove any the upper air grille on the front (PLIM) side of the chassis.
Required Tools and Equipment:
ESD-preventive wrist strap
6-in long number 1 Phillips screwdriver
Steps
To remove an alarm
module, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Use the
screwdriver to loosen the captive screw that fastens the alarm module to the
front (PLIM) side of the chassis.
Grasp the alarm
module and pull it halfway from the bay.
Use your free
hand to support the alarm module while you slide the alarm module completely
from the bay, then set it carefully aside.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Use the
screwdriver to loosen the captive screw that fastens the alarm module to the
front (PLIM) side of the chassis.
Step 3
Grasp the alarm
module and pull it halfway from the bay.
Caution
The alarm
module weighs about 4.2 lb (2 kg). Because of the weight of the alarm module
and the elevated position of the power shelf, you should use two hands when
handling the alarm module. It is safer to use a ladder to install or remove the
alarm module.
Step 4
Use your free
hand to support the alarm module while you slide the alarm module completely
from the bay, then set it carefully aside.
What to do next
After performing this task, install a replacement alarm module (if
necessary) and replace the upper grille on the front (PLIM) side of the
chassis.
Powering Up and Down
a Chassis with Fixed Configuration AC Power
This section
describes how to power up and power down an LCC with fixed configuration AC
power shelves installed. For details on the fixed configuration chassis AC
power system, see
AC
Power Systems.
Each power shelf in
the LCC has its own I/O switch for shelf power cutoff. Power shelf linkage cuts
power to the chassis as a whole when both power shelves are turned off. Most
components on the chassis, such as the power shelves, PEMs, alarm modules, and
fan trays, can be removed or installed in the chassis while it is running.
Although it is possible to install or remove a power shelf while the chassis is
running, it is recommended to remove power from the chassis completely, if
possible, for service protection and safety.
Note
Although the
chassis can be powered on by switching on the power shelf I/O switch (if all
individual power rectifier I/O switches are in the ON position), this method
draws a large power surge on start-up. We recommend following the procedure
outlined below to power the chassis on and off.
This figure shows the
front (PLIM) side of the LCC with fixed configuration power installed.
You need the following tools to perform this task:
ESD-preventive wrist strap
Multimeter
1/4-in. x 6-in. long slotted screwdriver
Steps
To power on the
chassis, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Make sure that
the safety ground wiring is connected.
Make sure that
the facility power breakers for the upper (PS0) and lower (PS1) power shelves
are in the OFF position.
Make sure that
all the I/0 switches are in an OFF position. That is, make sure all I/O levers
are pulled out. There are total of six power levers for the six AC power
rectifiers and two power levers for the two AC power shelves.
Make sure all
boards (RPs, PLIMs, SFCs, and FPs) are pulled-out and disconnected from the
backplane.
Remove the
cover plate from the rear of each fixed configuration AC power shelf.
Plug in AC
power cords for the upper (PS0) and lower (PS1) power shelf.
For AC Delta
and AC Wye, verify the following resistance values, as shown in
Figure 1
and
AC
Delta Power Self), for the upper (PS0) and lower (PS1) power shelf:
Make sure that
each input power cable one is connected, and energize the facility breaker to
each input.
Measure the
voltage between the following, for the upper (PS0) and lower (PS1) power shelf:
Turn the
facility breaker for the upper (PS0) and lower (PS1) power shelf to the OFF
position.
Turn the
facility breaker for the upper (PS0) and lower power shelf (PS1) to the ON
position.
Turn the power
shelf I/O switches on both power shelves (PS0 and PS1) to the ON position.
Verify that the “CBREAKER TRIP” LED on the front panel of each power rectifier
is yellow and that no other LEDs are active.
Turn the first
power rectifier (A0) I/O switch on the upper power shelf (PS0) to the ON
position. Verify that the “PWR OK” LED on the power rectifier front panel is
green and that no other LEDs are active. Repeat for the other two rectifiers
(A1 and A2).
Turn the first
power rectifier (B0) I/O switch on the lower power shelf (PS1) to the ON
position. Verify that the “Power OK” LED on the power rectifier front panel is
green and that no other LEDs are active. Repeat for the other two rectifiers
(B1 and B2).
Turn the I/O
switches on all power rectifiers and both power shelves to the OFF position.
Verify that no LEDs on the power rectifiers are active.
Insert all
boards (RPs, PLIMs, SFCs, and FPs) into the chassis (See
Installing and Removing Line Cards, PLIMs, and Associated
Components chapter for more information).
Turn the power
shelf I/O switches (PSO and PS1) to the ON position.
Turn all power
rectifier I/O switches to the ON position.
Measure the
input voltage of each input and compare this value to the voltage measurement
noted in Step10. Verify that the voltage is between 200 and 240 VAC, ensure
that the voltage drop is in the acceptable limits for your site.
Turn the I/O
switches on all power rectifiers and both power shelves to the OFF position.
Turn the facility breaker for the upper (PS0) and lower (PS1) power shelf to
the OFF position.
Replace the
cover plate on the rear of both AC power shelves.
Turn the
facility breaker for the upper (PS0) and lower (PS1) power shelf to the ON
position.
Turn both power
shelf I/O switches (PS0 and PS1) to the ON position. Turn all power rectifier
I/O switches to the ON position.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Make sure that
the safety ground wiring is connected.
Step 3
Make sure that
the facility power breakers for the upper (PS0) and lower (PS1) power shelves
are in the OFF position.
Step 4
Make sure that
all the I/0 switches are in an OFF position. That is, make sure all I/O levers
are pulled out. There are total of six power levers for the six AC power
rectifiers and two power levers for the two AC power shelves.
Step 5
Make sure all
boards (RPs, PLIMs, SFCs, and FPs) are pulled-out and disconnected from the
backplane.
Step 6
Remove the
cover plate from the rear of each fixed configuration AC power shelf.
Step 7
Plug in AC
power cords for the upper (PS0) and lower (PS1) power shelf.
Step 8
For AC Delta
and AC Wye, verify the following resistance values, as shown in
Figure 1
and
AC
Delta Power Self), for the upper (PS0) and lower (PS1) power shelf:
From L1 to
GND should be greater than 1 MOhms
From L2 to
GND should be greater than 1 MOhms
From L3 to
GND should be greater than 1 MOhms
For AC Wye
only, verify the following resistance values:
From L1 to
L4 (Neutral) should be greater than 1 MOhms
From L2 to
L4 (Neutral) should be greater than 1 MOhms
From L3 to
L4 (Neutral) should be greater than 1 MOhms
Step 9
Make sure that
each input power cable one is connected, and energize the facility breaker to
each input.
Step 10
Measure the
voltage between the following, for the upper (PS0) and lower (PS1) power shelf:
Between L1
and L2 (AC Delta only)
Between L2
and L3 (AC Delta only)
Between L3
and L1 (AC Delta only)
Between L1
and L4 (AC Wye only)
Between L2
and L4 (AC Wye only)
Between L3
and L4 (AC Wye only)
Verify that the
AC voltage is between 200 and 240 VAC. Make a note of this voltage measurement.
Step 11
Turn the
facility breaker for the upper (PS0) and lower (PS1) power shelf to the OFF
position.
Step 12
Turn the
facility breaker for the upper (PS0) and lower power shelf (PS1) to the ON
position.
Step 13
Turn the power
shelf I/O switches on both power shelves (PS0 and PS1) to the ON position.
Verify that the “CBREAKER TRIP” LED on the front panel of each power rectifier
is yellow and that no other LEDs are active.
Step 14
Turn the first
power rectifier (A0) I/O switch on the upper power shelf (PS0) to the ON
position. Verify that the “PWR OK” LED on the power rectifier front panel is
green and that no other LEDs are active. Repeat for the other two rectifiers
(A1 and A2).
Step 15
Turn the first
power rectifier (B0) I/O switch on the lower power shelf (PS1) to the ON
position. Verify that the “Power OK” LED on the power rectifier front panel is
green and that no other LEDs are active. Repeat for the other two rectifiers
(B1 and B2).
Turn the I/O
switches on all power rectifiers and both power shelves to the OFF position.
Verify that no LEDs on the power rectifiers are active.
Step 17
Insert all
boards (RPs, PLIMs, SFCs, and FPs) into the chassis (See
Installing and Removing Line Cards, PLIMs, and Associated
Components chapter for more information).
Step 18
Turn the power
shelf I/O switches (PSO and PS1) to the ON position.
Step 19
Turn all power
rectifier I/O switches to the ON position.
Step 20
Measure the
input voltage of each input and compare this value to the voltage measurement
noted in Step10. Verify that the voltage is between 200 and 240 VAC, ensure
that the voltage drop is in the acceptable limits for your site.
Step 21
Turn the I/O
switches on all power rectifiers and both power shelves to the OFF position.
Turn the facility breaker for the upper (PS0) and lower (PS1) power shelf to
the OFF position.
Step 22
Replace the
cover plate on the rear of both AC power shelves.
Step 23
Turn the
facility breaker for the upper (PS0) and lower (PS1) power shelf to the ON
position.
Step 24
Turn both power
shelf I/O switches (PS0 and PS1) to the ON position. Turn all power rectifier
I/O switches to the ON position.
What to do next
Note
For appropriate
MSC, RP, or PLIM LED information, see the appropriate section in
Installing and Removing Line
Cards, PLIMs, and Associated Components
or the specific documentation for the card.
To power down the
chassis entirely, you must power down both power shelves by moving the power
shelf I/O switch to the OFF position by lifting up on the lever and pulling it
out. Both power shelves must be disconnected to de-energize the chassis
completely.
This table shows
the meaning of the LED status lights on the AC power rectifiers in the fixed
configuration power system.
Table 3. AC Power
Rectifier LED Status Indicator Lights—Fixed Configuration Power
LED Name
Color
Function or
Meaning
PWR OK
Green
Rectifier
module is operating normally in a powered-up condition.
FAULT
Yellow
Fault has
been detected in the rectifier.
AC FAIL
Yellow
AC is out
of range or the rectifier is not receiving AC power input.
BREAKER
TRIP
Yellow
Rectifier
power switch is in the OFF position.
OT
Yellow
Rectifier
is in an over-temperature condition and a shutdown has occurred.
ILIM
Yellow
Rectifier
is operating in a current limit condition.
Power Up and Power
Down a Chassis with Fixed Configuration DC Power
This section
describes how to power up and power down an LCC with fixed configuration DC
power shelves installed. For details on the chassis power systems, see
Basic
Chassis Power Details and
DC
Power Systems.
Each power shelf in
the LCC has its own I/O switch for shelf power cutoff. The LCC as a whole does
not have a single power switch that powers the entire chassis and all its
components up and down. Power shelf linkage cuts power to the chassis as a
whole when both power shelves are turned off.
Most components on
the chassis, such as the power shelves, power modules, alarm modules, and fan
trays, can be removed or installed in the chassis while it is running. Although
it is possible to install or remove a power shelf while the chassis is running,
it is recommended to remove power from the chassis completely, if possible, for
service protection and safety.
Note
Although the
chassis can be powered on by switching on the two power shelf I/O switches (if
all individual power rectifier I/O switches are in the ON position), this
method draws a large power surge on start-up. We recommend following the
procedure outlined below to power the chassis on and off.
Make sure all PEM,
power shelf, and power source circuit breakers and switches are turned off (or
open) before you wire the power shelves.
Required Tools and Equipment
ESD-preventive wrist strap
Multimeter
Steps
To power on the
chassis, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Verify that the
safety ground wiring is connected to the upper (PS0) and lower (PS1) power
shelves.
Make sure that
the facility power breakers for the upper (PS0) and lower (PS1) power shelves
are in the OFF position.
Make sure all
the I/O switches are in an OFF position. That is, make sure all power levers
are pulled out. There are total of six power levers for the DC PEMs (one for
each of the six DC PEMs) and two power levers for the DC power shelves (one for
each power shelf).
Make sure all
boards (RPs, PLIMs, Line Cards, and FCs) are pulled-out and disconnected from
the backplane.
Energize the
facility breaker to PEM 0, input 1 on the upper power shelf, PS0.
Measure the
voltage at the input terminal block and verify that the DC voltage between the
positive and negative terminals is between 42 VDC and 72 VDC. Make a note of
this voltage measurement.
Turn the
facility breaker to the OFF position.
Repeat Step 7
and 8 and for each of the remaining five DC inputs on the upper power shelf
(PS0).
Repeat Step 7
and 8 for each of the six DC inputs on the lower power shelf (PS1).
Turn the
facility power breakers for the upper (PS0) and lower (PS1) power shelf to the
ON position.
Turn the upper
power shelf (PS0) I/O switch to the ON position. Verify that the “CBREAKER
TRIP” LED on the front panel of each DC PEM is yellow and that no other LEDs
are active.
Turn the first
PEM (A0) I/O switch on the upper power shelf (PS0) to the ON position. Verify
that the “PWR OK” LED on the DC PEM front panel is green and that no other LEDs
are active. Repeat for the other two PEMs (A1 and A2).
Turn the lower
power shelf (PS1) circuit breaker to the ON position. Verify that the “CBREAKER
TRIP” LED on the front panel of each DC PEM is yellow and that no other LEDs
are active.
Turn the first
PEM (B0) I/O switch on the lower power shelf (PS1) to the ON position. Verify
that the “PWR OK” LED on the DC PEM front panel is green and that no other LEDs
are active. Repeat for the other two PEMs (A1 and A2).
Turn the I/O
switches on all PEMs and both power shelves to the OFF position. Verify that no
LEDs on the PEMs are active.
Insert all
boards into the chassis (For more information,
Installing
and Removing Line Cards, PLIMs, and Associated Components chapter).
Turn the power
shelf I/O switches (PS0 and PS1) to the ON position.
Turn all DC PEM
I/O switches to the ON position.
Measure the
input voltage of each input and compare this value to the voltage measurement
noted in Step 7. Verify that the equipment is still receiving the correct input
voltage measured in Step 7.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Verify that the
safety ground wiring is connected to the upper (PS0) and lower (PS1) power
shelves.
Step 3
Make sure that
the facility power breakers for the upper (PS0) and lower (PS1) power shelves
are in the OFF position.
Step 4
Make sure all
the I/O switches are in an OFF position. That is, make sure all power levers
are pulled out. There are total of six power levers for the DC PEMs (one for
each of the six DC PEMs) and two power levers for the DC power shelves (one for
each power shelf).
Step 5
Make sure all
boards (RPs, PLIMs, Line Cards, and FCs) are pulled-out and disconnected from
the backplane.
Step 6
Energize the
facility breaker to PEM 0, input 1 on the upper power shelf, PS0.
Caution
Make sure
that the polarity of the DC input wiring is correct.
Caution
This is a
positive ground system; make sure to connect the positive lead to the +RTN
terminal and the negative lead to the –48V terminal.
Step 7
Measure the
voltage at the input terminal block and verify that the DC voltage between the
positive and negative terminals is between 42 VDC and 72 VDC. Make a note of
this voltage measurement.
Step 8
Turn the
facility breaker to the OFF position.
Step 9
Repeat Step 7
and 8 and for each of the remaining five DC inputs on the upper power shelf
(PS0).
Step 10
Repeat Step 7
and 8 for each of the six DC inputs on the lower power shelf (PS1).
Step 11
Turn the
facility power breakers for the upper (PS0) and lower (PS1) power shelf to the
ON position.
Step 12
Turn the upper
power shelf (PS0) I/O switch to the ON position. Verify that the “CBREAKER
TRIP” LED on the front panel of each DC PEM is yellow and that no other LEDs
are active.
Step 13
Turn the first
PEM (A0) I/O switch on the upper power shelf (PS0) to the ON position. Verify
that the “PWR OK” LED on the DC PEM front panel is green and that no other LEDs
are active. Repeat for the other two PEMs (A1 and A2).
Step 14
Turn the lower
power shelf (PS1) circuit breaker to the ON position. Verify that the “CBREAKER
TRIP” LED on the front panel of each DC PEM is yellow and that no other LEDs
are active.
Step 15
Turn the first
PEM (B0) I/O switch on the lower power shelf (PS1) to the ON position. Verify
that the “PWR OK” LED on the DC PEM front panel is green and that no other LEDs
are active. Repeat for the other two PEMs (A1 and A2).
Turn the I/O
switches on all PEMs and both power shelves to the OFF position. Verify that no
LEDs on the PEMs are active.
Step 17
Insert all
boards into the chassis (For more information,
Installing
and Removing Line Cards, PLIMs, and Associated Components chapter).
Step 18
Turn the power
shelf I/O switches (PS0 and PS1) to the ON position.
Step 19
Turn all DC PEM
I/O switches to the ON position.
Step 20
Measure the
input voltage of each input and compare this value to the voltage measurement
noted in Step 7. Verify that the equipment is still receiving the correct input
voltage measured in Step 7.
What to do next
Note
For appropriate
MSC, RP, or PLIM LED information, see the appropriate section in
Installing
and Removing Line Cards, PLIMs, and Associated Components or the
specific documentation for the card.
To power down the
chassis entirely, you must power down both of the power shelves by moving the
power shelf power switch to the OFF position by lifting
up on the lever
and pulling it out. Both power shelves must be disconnected to de-energize the
chassis completely.
This table shows
the meaning of the LED status lights on the DC PEMs.
Table 4. Fixed
Configuration DC PEM LED Status Indicator Lights
LED Name
Color
Function or
Meaning
PWR OK
Green
PEM is
operating normally in a powered up condition.
FAULT
Yellow
Fault has
been detected within the PEM.
DC INPUT
FAIL
Yellow
DC input is
out of range or is not being provided to the PEM.
OT
Yellow
PEM is in
an over temperature condition and shutdown has occurred.
CBREAKER
TRIP
Yellow
PEM I/O
switch is in the OFF position.
Converting from One Fixed Configuration Power System to Another
This section describes how to convert from one fixed configuration power system to another (either from fixed AC to fixed
DC or from fixed DC to fixed AC).
Steps
To convert an LCC
with a fixed configuration power system from AC to DC power, or from DC to AC
power, perform the following steps:
Use only one type
of fixed configuration power shelf—AC Wye, AC Delta, or DC—and its mating AC
rectifier or DC PEM in a chassis at one time.
Installing and
Removing Modular Configuration Power Components
This section
describes how to install and remove modular configuration power components in
the LCC.
Before you can
install the modular configuration power components, you must install the
modular configuration power shelf into the chassis. After installing the power
shelf, you can install the power self wiring, install the PMs and install the
alarm module into the power shelf.
Note
Although there are
differences between the different types of power shelves and PMs (AC and DC),
they are installed and removed using the same procedures.
This section
describes how to install the modular configuration AC or DC power shelves in
the LCC. For complete information on regulatory compliance and safety, see
Regulatory Compliance and Safety Information for the Cisco
CRS.
Caution
Do not use the
handles for lifting or supporting the power shelf, because this could severely
damage the handles.
Caution
Do not bend the
handles sideways during any part of the installation process.
Although there are
differences between the AC and DC power shelves, they are installed and removed
using the same procedures.
The front and rear
views of the modular configuration DC power shelves are shown in the following
figures.
The front and rear
views of the modular configuration AC power shelf are shown in the next
figures.
Prerequisites
Remove the upper grilles from both the front (PLIM) and rear (MSC) sides of the chassis, if installed. Verify that the power
shelf that you are about to install is the correct power shelf.
Note
Do not install the power shelf in the chassis with AC or DC PMs, or alarm module installed in the power shelf.
Required Tools and Equipment
6-in. long number 1 Phillips screwdriver
10-mm 6 pt. combination wrench
Modular configuration AC or DC power shelf
AC power shelf (Cisco product number CRS-16LCC-PSH-AC=), or
DC power shelf (Cisco product number CRS-16LCC-PSH-DC=)
Steps
To install the
modular configuration power shelf, perform the following steps:
SUMMARY STEPS
Using the 10-mm
wrench, loosen the two bolts on the rear of the chassis that clamp the rear of
the power shelf to the chassis, as shown in this figure.
Install the
mounting blocks on the left and right sides of the chassis. The left side is
shown in the next figure. A second mounting block is located on the right side.
Unscrew the
ejector handles from the front face of the shelf, one on each side.
Holding the
power shelf underneath with one hand and steadying it with the other, lift the
shelf up and slide it partway into the power shelf slot on the front (PLIM)
side of the chassis.
Grasping both
handles simultaneously, push both the left and right handles up in at the same
time to push the shelf into the chassis. Slide the shelf all the way into the
chassis, pushing in the shelf until both handles hook around the pins.
Using the
wrench, tighten the two bolts that attach the rear of the power shelf to the
rear of the chassis.
Using the
screwdriver, turn the captive screws at the top of the left and right handles.
Use the
screwdriver to screw the shelf to the left and right mounting blocks through
the handle holes. There are four holes, two on each handle.
DETAILED STEPS
Step 1
Using the 10-mm
wrench, loosen the two bolts on the rear of the chassis that clamp the rear of
the power shelf to the chassis, as shown in this figure.
Step 2
Install the
mounting blocks on the left and right sides of the chassis. The left side is
shown in the next figure. A second mounting block is located on the right side.
1
Mounting block with two screw holes
2
Holes
in chassis to be aligned with the mounting block
Step 3
Unscrew the
ejector handles from the front face of the shelf, one on each side.
Step 4
Holding the
power shelf underneath with one hand and steadying it with the other, lift the
shelf up and slide it partway into the power shelf slot on the front (PLIM)
side of the chassis.
Caution
Because of
the weight of the power shelf and the rack-mounted height of the chassis, you
should be especially careful while lifting and removing the power shelf. To
prevent injury, keep your back straight and lift with your legs, not your back.
Avoid sudden twists or lateral moves. It is safer to use two people and a
ladder to install or remove the power shelf rather than a single person. After
two people have placed the power shelf in position, one person can slide it
into place.
Step 5
Grasping both
handles simultaneously, push both the left and right handles up in at the same
time to push the shelf into the chassis. Slide the shelf all the way into the
chassis, pushing in the shelf until both handles hook around the pins.
Caution
Make sure
both handles swing straight up. Use care not to bend the handles sideways.
1
Ejector handle pulled away from the shelf
2
Ejector handle pushed up to slide in the shelf
1
Ejector handles section that fits around mounting pins
2
Mounting pins that are permanently installed in the chassis and cannot be moved
or removed
Step 6
Using the
wrench, tighten the two bolts that attach the rear of the power shelf to the
rear of the chassis.
Step 7
Using the
screwdriver, turn the captive screws at the top of the left and right handles.
Step 8
Use the
screwdriver to screw the shelf to the left and right mounting blocks through
the handle holes. There are four holes, two on each handle.
1
Top
mounting screw in handle.
2
Holes
for the screw that attaches the power shelf to the mounting block though the
handle.
What to do next
After the modular configuration power shelves are installed in the
chassis, install the grounding lug and brackets, and AC or DC power shelf
wiring. Continue to
Installing Power Shelf Grounding Brackets and
Installing AC or DC Power Shelf Wiring for instructions
.
Removing a Modular Configuration Power Shelf
This section describes how to remove the modular configuration power shelf from the LCC.
Do not use the handles for lifting or supporting the power shelf, because this could severely damage the handles.
Caution
Do not bend the handles sideways during any part of the removal process.
Steps
To remove a modular
configuration power shelf, perform the following steps:
SUMMARY STEPS
Using the
wrench, loosen the two bolts on the rear of the chassis that clamp the rear of
the power shelf to the chassis.
Insert the
screwdriver through the hole in the mounting handles, and unscrew the shelf
from the right and left side of the mounting blocks.
Using the
screwdriver, unscrew captive screw on the left and right handles (see previous
figure).
Grasping both
handles simultaneously, pull both the left and right handles down at the same
time to pull the shelf partially out of the chassis.
When the shelf
is partially out of the chassis and the ejector handles are away from the pins,
hand-tighten the handle screws back into the shelf.
Slide out the
shelf out so that two people can safely remove it and carefully set it down on
a flat surface.
DETAILED STEPS
Step 1
Using the
wrench, loosen the two bolts on the rear of the chassis that clamp the rear of
the power shelf to the chassis.
1
Bolts
to be loosened that secure rear of power shelf to chassis
Step 2
Insert the
screwdriver through the hole in the mounting handles, and unscrew the shelf
from the right and left side of the mounting blocks.
1
Top
mounting screw in handle.
2
Holes
for the screw that attaches the power shelf to the mounting block though the
handle.
Step 3
Using the
screwdriver, unscrew captive screw on the left and right handles (see previous
figure).
Note
The handles
will fall down and slightly away from the shelf.
1
Initial position, with handle in place against power shelf
2
Handle pulled down for removal of power shelf
Step 4
Grasping both
handles simultaneously, pull both the left and right handles down at the same
time to pull the shelf partially out of the chassis.
Step 5
When the shelf
is partially out of the chassis and the ejector handles are away from the pins,
hand-tighten the handle screws back into the shelf.
Step 6
Slide out the
shelf out so that two people can safely remove it and carefully set it down on
a flat surface.
Caution
Because of
the weight of the power shelf and the rack-mounted height of the chassis, you
should be especially careful while lifting and removing the power shelf. To
prevent injury, keep your back straight and lift with your legs, not your back.
Avoid sudden twists or lateral moves. It is safer to use two people and a
ladder to install or remove the power shelf rather than a single person. After
two people have placed the power shelf in position, one person can slide it
into place.
What to do next
After performing this task, replace the upper grille on the front
(PLIM) and rear (MSC) sides of the chassis.
Installing Power
Shelf Grounding Brackets
This section
describes how to install the external grounding brackets on the LCC modular
configuration power shelf. The installation procedure for installing the power
shelf grounding brackets is the same for both the AC and DC modular
configuration power shelves.
Caution
Verify that the
chassis is connected to a reliable earth ground; the chassis ground cable must
be installed in accordance with local electrical safety standards. For more
information, see
Bonding
and Grounding Guidelines.
You need the following tools to perform this task:
ESD-preventive wrist strap
3/8-in. ratchet wrench with 10-mm socket
Torque wrench with 10-mm socket and rated accuracy at 20 in.-lb (2.26 N-m)
Steps
To install the
power shelf grounding brackets, go to the rear (MSC) of the chassis and perform
the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Align the shelf
grounding bracket with the power shelves.
Attach the
shelf grounding bracket to both power shelves using the four M6 hex head bolts
provided. Do not tighten (see the next figure).
Attach the
grounding L-bracket to the shelf grounding bracket using the two M6 hex nuts
provided. Do not tighten (see the next figure).
Attach the
grounding L-bracket to the chassis using the two M6 hex bolts provided. Using
the torque wrench, tighten the M6 hex bolts to a torque of 20 in.-lb (2.26
N-m).
Using the
torque wrench, tighten the four M6 hex bolts attaching the grounding bracket to
the power shelves to a torque of 20 in.-lb (2.26 N-m).
Using the
torque wrench, tighten the two M6 hex nuts attaching the grounding L-bracket to
the power shelf to a torque of 20 in.-lb (2.26 N-m).
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Align the shelf
grounding bracket with the power shelves.
Step 3
Attach the
shelf grounding bracket to both power shelves using the four M6 hex head bolts
provided. Do not tighten (see the next figure).
Step 4
Attach the
grounding L-bracket to the shelf grounding bracket using the two M6 hex nuts
provided. Do not tighten (see the next figure).
1
Chassis ground cable
5
Two
M6 hex nuts attaching grounding L-bracket to shelf grounding bracket (Step 4)
2
Two
M6 hex bolts attaching ground lug to chassis
6
Grounding L-bracket ( Step 5)
3
Shelf
grounding bracket (Step 3)
7
Four
M6 hex bolts attaching shelf grounding bracket to power shelves (Step 3)
4
Two
M6 hex bolts attaching grounding L-bracket to chassis (Step 5)
Note
A 45-degree
grounding lug is shown in previous figure. A 180-degree (straight) grounding
lug can also be used.
Step 5
Attach the
grounding L-bracket to the chassis using the two M6 hex bolts provided. Using
the torque wrench, tighten the M6 hex bolts to a torque of 20 in.-lb (2.26
N-m).
Step 6
Using the
torque wrench, tighten the four M6 hex bolts attaching the grounding bracket to
the power shelves to a torque of 20 in.-lb (2.26 N-m).
Step 7
Using the
torque wrench, tighten the two M6 hex nuts attaching the grounding L-bracket to
the power shelf to a torque of 20 in.-lb (2.26 N-m).
This section describes how to remove the power shelf grounding brackets for the LCC modular configuration power supply. The
procedure for removing the power shelf grounding brackets is the same for both the AC and DC modular configuration power supplies.
You need the following tools to perform this task:
ESD-preventive wrist strap
3/8-in. ratchet wrench with 10-mm socket
Steps
To remove the power
shelf grounding brackets, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the rear (MSC) side of the chassis or a bare metal
surface on the chassis.
Using a 10 mm
socket wrench, loosen the two M6 hex nuts that attach the grounding L-bracket
to the power shelf. Do not fully remove.
Using a 10 mm
socket wrench, loosen the four M6 hex bolts that attach the grounding bracket
to the power shelves. Do not fully remove.
Use a 10 mm
socket wrench to remove the two M6 hex bolts that attach the grounding
L-bracket to the chassis.
Remove the two
M6 hex nuts that attach the grounding L-bracket to the shelf grounding bracket.
Remove the
grounding L-bracket.
Remove the four
M6 hex bolts that attach the shelf grounding bracket to the power shelves.
Remove the
shelf grounding bracket from the power shelves.
If the chassis
is being replaced, use the 10-mm socket wrench to remove the ground cable from
the grounding point on top of the chassis rear (MSC) side panel.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the rear (MSC) side of the chassis or a bare metal
surface on the chassis.
Step 2
Using a 10 mm
socket wrench, loosen the two M6 hex nuts that attach the grounding L-bracket
to the power shelf. Do not fully remove.
1
Chassis ground cable
5
Two
M6 hex nuts attaching grounding L-bracket to shelf grounding bracket (Step 4)
2
Two
M6 hex bolts attaching ground lug to chassis
6
Grounding L-bracket (Step 5)
3
Shelf
grounding bracket (Step 3)
7
Four
M6 hex bolts attaching shelf grounding bracket to power shelves (Step 3)
4
Two
M6 hex bolts attaching grounding L-bracket to chassis (Step 5)
Note
A 45-degree
grounding lug is shown in the previous figure. A 180-degree (straight)
grounding lug can also be used.
Step 3
Using a 10 mm
socket wrench, loosen the four M6 hex bolts that attach the grounding bracket
to the power shelves. Do not fully remove.
Step 4
Use a 10 mm
socket wrench to remove the two M6 hex bolts that attach the grounding
L-bracket to the chassis.
Step 5
Remove the two
M6 hex nuts that attach the grounding L-bracket to the shelf grounding bracket.
Step 6
Remove the
grounding L-bracket.
Step 7
Remove the four
M6 hex bolts that attach the shelf grounding bracket to the power shelves.
Step 8
Remove the
shelf grounding bracket from the power shelves.
Step 9
If the chassis
is being replaced, use the 10-mm socket wrench to remove the ground cable from
the grounding point on top of the chassis rear (MSC) side panel.
Caution
Do not remove
the chassis ground cable unless the chassis is being replaced.
This section describes how to connect the DC input wiring to the rear of the power shelf and install the DC terminal block
covers and AC cords on the LCC. For complete information on regulatory compliance and safety, see Regulatory Compliance and Safety Information for the Cisco CRS Carrier Routing System
.
Installing Modular
Configuration DC Power Shelf Wiring
This section
describes how to connect the DC input wiring to the rear of the power shelf and
install the DC terminal block covers on the LCC.
This figure shows the
cable wiring for the modular configuration power shelf.
Before performing this task, ensure that both power shelves are installed in the chassis. Remove the upper grille from the
rear (MSC) side of the chassis, if installed.
Note
Before installing wiring on the power shelf, make sure that the input power cables are not energized.
Required Tools and Equipment
ESD-preventive wrist strap
Crimping tool and lug specific die
3/8 in. ratchet wrench with 10-mm socket
Torque wrench with 10-mm 6 pt. socket and rated accuracy at 20 in.-lb (2.26 N-m)
Steps
To wire the modular
configuration DC power shelf, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Remove the
terminal block cover.
Verify the
following resistance values:
Use the
crimping tool mandated by the lug manufacturer to crimp the lugs to the
DC-input cables. For details on lugs, see
DC
Power Systems.
Using the
wrench, attach the positive and negative cable pairs to each terminal block for
both power shelves. Use the torque wrench to tighten to a torque of 20 in.-lb
(2.26 N-m).
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Remove the
terminal block cover.
Step 3
Verify the
following resistance values:
The
resistance between the positive and negative power terminal studs of each input
must be greater than 90 KOhm.
The
resistance between each positive terminal stud and bare metal surface on the
power shelf must be greater than 10 MOhm.
The
resistance between each negative terminal stud and bare metal surface on the
power shelf must be greater than 10 MOhm.
Step 4
Use the
crimping tool mandated by the lug manufacturer to crimp the lugs to the
DC-input cables. For details on lugs, see
DC
Power Systems.
The cable
should be sized according to local and national installation requirements. Use
only copper cable.
Note
The power
supply terminal block lug opening width is 0.63 inch (1.60 cm). The terminal
posts are centered 0.63 inches (5/8 inch) (1.60 cm) apart and are M6-threaded.
We recommend that you use an appropriately sized 180-degree (straight) industry
standard 2-hole, standard barrel compression lug.
Step 5
Using the
wrench, attach the positive and negative cable pairs to each terminal block for
both power shelves. Use the torque wrench to tighten to a torque of 20 in.-lb
(2.26 N-m).
Install the
terminal block cover after the input wiring is installed, but before power has
been energized.
Required Tools and Equipment
You need the following tools to perform this task:
ESD-preventive wrist strap
6-in. long Number 1 Phillips screwdriver
Steps
To install the DC
terminal block covers, go to the rear (MSC) side of the chassis and perform the
following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Align the DC
terminal block cover with the cover latch tab.
Use the
screwdriver to secure the screw into the mounting standoff.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Align the DC
terminal block cover with the cover latch tab.
Step 3
Use the
screwdriver to secure the screw into the mounting standoff.
1
DC
terminal block.
5
Opening to align over mounting pins
2
Screw
to tighten (pre-installed on terminal block)
6
Opening to align over mounting pins
3
Screwdriver securing the cover
7
Cover
latch tab
4
Terminal block cover
Installing Modular
Configuration AC Power Cords
This section
describes how to install input AC cords on the rear of the modular
configuration power shelf.
Before performing
this task, ensure that both power shelves are installed in the chassis. Remove
the upper grille from the rear (MSC) side of the chassis, if installed.
If you have AC Delta
or AC Wye at your equipment, ensure that two
Cisco CRS PDUs
are installed to convert 3-phase AC input power to single-phase AC
input power for the power shelves. For more information, see the
Cisco CRS 3-Phase AC Power Distribution Unit Installation
Guide.
Note
Before installing
input AC power cords on the power shelf, make sure that the input power cords
are not energized.
Required Tools and Equipment
You need the following tools to perform this task:
6-in. long number 1 Phillips screwdriver
Steps
To install the
input AC cord, go to the rear of the chassis and perform the following steps:
SUMMARY STEPS
Insert the cord
into the cord clamp.
Use the
screwdriver to tighten the screw that clamps the cord in place.
DETAILED STEPS
Step 1
Insert the cord
into the cord clamp.
Note
If you have
a Cisco CRS PDU installed, the AC power cords must be installed as labeled. For
further information, see
Cisco CRS 3-Phase AC Power Distribution Unit Installation
Guide.
1
Screw
that secures the cord clamp
3
Cord
to be inserted into clamp
2
Screwdriver tightening screw
Note
In the
figure, the AC cord clamp shown on the left was available until June 2011, and
the AC cord clamp shown on the right is available from June 2011 onwards. The
location of the screw that secures the cord in the cord clamp is different.
Step 2
Use the
screwdriver to tighten the screw that clamps the cord in place.
This section describes how to remove the DC input wiring, DC terminal blocks and AC cords from the rear of the power shelf
on the LCC.
Removing Modular Configuration DC Power Shelf Wiring
This section describes how to remove the DC power shelf wiring from the rear of the modular configuration DC power shelf.
Prerequisites
Before performing this task, power down and remove DC PMs and the alarm module in the shelf you want to disconnect. Remove
the upper grille from the rear (MSC) side of the chassis, if installed.
Note
Before removing wiring from the power shelf, make sure that the input power cables are not energized.
Required Tools and Equipment
ESD-preventive wrist strap
6-in. long number 1 Phillips screwdriver
3/8-in. ratchet wrench with 10-mm socket
Steps
To disconnect
wiring from the fixed configuration DC power shelf, perform the following
steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Use the
screwdriver to remove the screw that secures the terminal block cover into the
mounting standoff.
Remove the
terminal block cover.
Using the 10-mm
socket wrench, remove the positive and negative cable pairs from each terminal
block.
Replace the
terminal block cover.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Use the
screwdriver to remove the screw that secures the terminal block cover into the
mounting standoff.
1
DC
terminal block.
5
Opening to align over mounting pins
2
Screw
to tighten (pre-installed on terminal block)
6
Opening to align over mounting pins
3
Screwdriver securing the cover
7
Cover
latch tab
4
Terminal block cover
Step 3
Remove the
terminal block cover.
Step 4
Using the 10-mm
socket wrench, remove the positive and negative cable pairs from each terminal
block.
Note
When a cable
is removed from the rear of the DC modular configuration power shelf, we
recommend that it should be wrapped with standard black electrical tape.
Step 5
Replace the
terminal block cover.
Removing Modular Configuration AC Power Shelf Wiring
This section describes how to remove input AC cords from the rear of the modular configuration DC power shelf.
Prerequisites
Before performing this task, power down and remove AC PMs and the alarm module in the shelf you want to disconnect.Remove
the upper grille from the rear (MSC) side of the chassis, if installed.
Note
Before removing wiring from the power shelf, make sure that the input power cables are not energized.
Required Tools and Equipment
6-in. long number 1 Phillips screwdriver
Steps
To remove the input
AC cords, go to the rear of the chassis and perform the following steps:
SUMMARY STEPS
Use the
screwdriver to loosen the screws that clamp the cords in place.
Remove the
cords from the cord clamps.
DETAILED STEPS
Step 1
Use the
screwdriver to loosen the screws that clamp the cords in place.
1
Screw
that secures the cord clamp
2
Cord
to be inserted into clamp
Note
In the
figure, the AC cord clamp shown on the left was available until June 2011, and
the AC cord clamp shown on the right is available from June 2011 onwards. The
location of the screw that secures the cord in the cord clamp is different.
This section
describes how to install the alarm modules in a modular configuration power
shelf in the LCC.
This figure shows a
modular configuration alarm module.
1
Side of
alarm module to be installed on the right side of the opening.
Prerequisites
Before performing this task, you must first remove the upper grille on the front (PLIM) side of the chassis, if installed.
Caution
Do not attempt to install the alarm module until the modular configuration power shelf is in place and screwed into the chassis.
Required Tools and Equipment
ESD-preventive wrist strap
6-in. long number 1 Phillips screwdriver
Modular configuration alarm module (Cisco product number CRS-16-ALARM-C=)
Steps
To install the
alarm module, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Slide the alarm
module into the top left bay on the power shelf, with the display on the right
side and the handle on the left side.
Hand tighten
the two captive screws on the alarm module.
Use the
screwdriver to securely fasten the alarm module to the power shelf.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Slide the alarm
module into the top left bay on the power shelf, with the display on the right
side and the handle on the left side.
Step 3
Hand tighten
the two captive screws on the alarm module.
Step 4
Use the
screwdriver to securely fasten the alarm module to the power shelf.
This section
describes how to remove the alarm modules, shown in the previous figure, from
the modular configuration power shelf installed in the LCC.
Required Tools and Equipment
You need the following tools to perform this task:
ESD-preventive wrist strap
6-in. long number 1 Phillips screwdriver
Steps
To remove the alarm
module, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Remove the
upper grille on the front (PLIM) side of the chassis. For detailed
instructions, see
Installing and Removing Exterior Cosmetic Components.
Use the
screwdriver to loosen the two captive screws securing the alarm module to the
power shelf.
Loosen by hand
the panel fasteners on the alarm module.
Carefully slide
the alarm module out of the power shelf.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Remove the
upper grille on the front (PLIM) side of the chassis. For detailed
instructions, see
Installing and Removing Exterior Cosmetic Components.
Step 3
Use the
screwdriver to loosen the two captive screws securing the alarm module to the
power shelf.
Step 4
Loosen by hand
the panel fasteners on the alarm module.
Step 5
Carefully slide
the alarm module out of the power shelf.
What to do next
After performing this task, install a replacement alarm module (if
necessary) and re-install the upper grille on the front (PLIM) side of the
chassis.
Installing a Modular
Configuration Power Module
This section
describes how to install the AC or DC PMs in the LCC.
Prerequisites
Before performing this task, you must first remove the upper grille on the front (PLIM) side of the chassis, if installed.
Caution
Do not attempt to install the PM until the modular configuration power shelf is in place and screwed into the chassis.
Required Tools and Equipment
ESD-preventive wrist strap
6-in. long number 1 Phillips screwdriver
Torque screwdriver with number 1 Phillips bit and rated accuracy at 5.5 in.-lb (0.62 N-m)
Modular configuration AC or DC PM
AC PM (Cisco product number CRS-PM-AC=), or
DC PM (Cisco product number CRS-PM-DC=)
Steps
To install the PM
in a modular configuration power shelf, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Using two hands
to support and guide the PM, slide it into the power shelf.
Flip up the
ejector and with nominal install torque of 5.5 in.-lb (0.62 N m), screw the PM
into the shelf. Do not exceed an install torque of 10 in.-lb (1.13 N-m).
Fill the power
shelf to the required configuration.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Using two hands
to support and guide the PM, slide it into the power shelf.
Step 3
Flip up the
ejector and with nominal install torque of 5.5 in.-lb (0.62 N m), screw the PM
into the shelf. Do not exceed an install torque of 10 in.-lb (1.13 N-m).
Step 4
Fill the power
shelf to the required configuration.
What to do next
After the modular configuration PMs are installed in the chassis,
install power module slot covers in empty PM slots, if any. For more
information, see
Installing
a Power Module Slot Cover.
Removing a Modular
Configuration Power Module
This section
describes how to remove a PM from a modular configuration power shelf.
Prerequisites
Before performing this task, you must first remove the upper grille on the front (PLIM) side of the chassis, if installed.
Required Tools and Equipment
You need the following tools to perform this task:
ESD-preventive wrist strap
6-in. long number 1 Phillips screwdriver
Steps
To remove a PM from
a modular configuration power shelf, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Remove the
upper grille on the front (PLIM) side of the chassis. For detailed
instructions, go to
Installing and Removing Exterior Cosmetic Components.
Using the
screwdriver, unscrew the ejector from the PM.
Flip down the
ejector, slide the PM out of the power shelf, and carefully place it down on a
flat surface.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Remove the
upper grille on the front (PLIM) side of the chassis. For detailed
instructions, go to
Installing and Removing Exterior Cosmetic Components.
Step 3
Using the
screwdriver, unscrew the ejector from the PM.
Step 4
Flip down the
ejector, slide the PM out of the power shelf, and carefully place it down on a
flat surface.
What to do next
After performing this task, install a replacement AC or DC PM if
necessary (see
Removing
a Modular Configuration Power Module) and re-install the upper grille on
the front (PLIM) side of the chassis.
Installing a Power Module Slot Cover
This section describes how to install power module slot covers, in empty power module slots in the power shelves installed
in the LCC.
Although the AC and DC power module slot covers differ slightly in size, they are installed using the same procedures.
Prerequisites
Before performing this task, you must first remove the upper grille on the front (PLIM) side of the chassis, if installed,
and install the alarm module and power modules to the required configuration in each power shelf.
Required Tools and Equipment
You need the following tools to perform this task:
ESD-preventive wrist strap
AC or DC PM Slot Cover
AC PM slot cover (Cisco product number 700–29097–xx), or
DC PM slot cover (Cisco product number 700–29098–xx)
Steps
To install a PM
slot cover in a modular configuration power shelf, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Align the PM
slot cover with the empty PM slot in the power shelf.
Insert the two
tabs on the right side of the PM slot cover into the two holes on the right
side of the PM slot.
Push the left
side of the PM slot cover gently until it clicks into place.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Align the PM
slot cover with the empty PM slot in the power shelf.
Step 3
Insert the two
tabs on the right side of the PM slot cover into the two holes on the right
side of the PM slot.
Step 4
Push the left
side of the PM slot cover gently until it clicks into place.
What to do next
After the PM slot covers are installed in the chassis, install the
upper grille on the front (PLIM) side of the chassis.
Removing a Power Module Slot Cover
This section describes how to remove a PM slot cover from a PM slot in a modular configuration AC or DC power shelf.
Prerequisites
Before performing this task, you must first remove the upper grille on the front (PLIM) side of the chassis, if installed.
Required Tools and Equipment
You need the following tools to perform this task:
ESD-preventive wrist strap
Steps
To remove a PM slot
cover from a power shelf, perform the following steps:
SUMMARY STEPS
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Gently pinch
the tab on the left side of the PM slot cover to detach the PM slot cover from
the PM slot, as shown in the previous figure.
Remove the two
tabs on the right side of the PM slot cover from the two holes on the right
side of the PM slot, as shown in the previous figure.
Set the PM slot
cover aside.
DETAILED STEPS
Step 1
Attach the
ESD-preventive wrist strap to your wrist and connect its leash to one of the
ESD connection sockets on the front (PLIM) side of the chassis or a bare metal
surface on the chassis.
Step 2
Gently pinch
the tab on the left side of the PM slot cover to detach the PM slot cover from
the PM slot, as shown in the previous figure.
Step 3
Remove the two
tabs on the right side of the PM slot cover from the two holes on the right
side of the PM slot, as shown in the previous figure.
Most components on
the chassis, such as the PMs, alarm modules, and fan trays, can be removed or
installed in the chassis while it is running. Although it is possible to
install or remove a power shelf while the chassis is running, it is recommended
to remove power from the chassis completely, if possible, for service
protection and safety.
The figure shows the
front (PLIM) side of the LCC with a modular configuration power system
installed.
Power Up a Chassis with Modular Configuration Power
This section describes how to power up a chassis with modular configuration AC or DC power shelves installed.
To power on the
chassis, perform the following steps:
SUMMARY STEPS
Make sure that
the facility power breakers for the upper (Power A) and lower (Power B) power
shelves are in the OFF position.
Make sure that
I/O switches on the rear of the upper (Power A) and lower (Power B) power
shelves are in the OFF position.
Make sure all
boards (RPs, PLIMs, SFCs, and FPs) are pulled-out and disconnected from the
backplane.
If you have a
modular configuration DC power system installed:
Turn the
facility breakers for the upper power shelf (Power A) to the ON position.
Verify that the Input_OK LED on all of the PMs installed in the upper shelf are
green.
Turn the I/O
switch at the rear of the upper power shelf (Power A) to the ON position.
Verify that the Output_OK LED on all of the PMs installed in the upper shelf
are green.
Repeat Step 5
and Step 6 for the lower power shelf (Power B).
Turn the I/O
switch at the rear of both upper power shelves (Power A and Power B) to the OFF
position. Verify that none of the Output_OK LEDs on the PMs installed in the
shelf are green.
Install all
boards (RPs, PLIMs, SFCs, and FPs) in the chassis. For more information, see
Installing and Removing Line Cards, PLIMs, and Associated
Components.
Turn the I/O
switch at the rear of both power shelves (Power A and Power B) to the ON
position.
If you have a
modular configuration DC power system installed, measure the input voltage of
each DC input and compare this value to the voltage measurement noted in Step
4. Verify that the equipment is still receiving the correct input voltage
measured in Step 4.
DETAILED STEPS
Step 1
Make sure that
the facility power breakers for the upper (Power A) and lower (Power B) power
shelves are in the OFF position.
Step 2
Make sure that
I/O switches on the rear of the upper (Power A) and lower (Power B) power
shelves are in the OFF position.
Step 3
Make sure all
boards (RPs, PLIMs, SFCs, and FPs) are pulled-out and disconnected from the
backplane.
Step 4
If you have a
modular configuration DC power system installed:
Energize
the facility breaker to PM 0, on the upper power shelf, Power A.
Measure the
voltage at the input terminal block and verify that the DC voltage between the
positive and negative terminals is between 48 VDC and 60 VDC. Make a note of
this voltage measurement.
Turn the
facility breaker to the OFF position.
Caution
Make sure
that the polarity of the DC input wiring is correct.
Caution
This is a
positive ground system; make sure to connect the positive lead to the +RTN
terminal and the negative lead to the –48V terminal.
Repeat 4a
through 4c for each of the remaining DC inputs on the upper power shelf, Power
A.
Repeat 4a
through 4d for each of the DC inputs on the lower power shelf, Power B.
Step 5
Turn the
facility breakers for the upper power shelf (Power A) to the ON position.
Verify that the Input_OK LED on all of the PMs installed in the upper shelf are
green.
Step 6
Turn the I/O
switch at the rear of the upper power shelf (Power A) to the ON position.
Verify that the Output_OK LED on all of the PMs installed in the upper shelf
are green.
Step 7
Repeat Step 5
and Step 6 for the lower power shelf (Power B).
Step 8
Turn the I/O
switch at the rear of both upper power shelves (Power A and Power B) to the OFF
position. Verify that none of the Output_OK LEDs on the PMs installed in the
shelf are green.
Step 9
Install all
boards (RPs, PLIMs, SFCs, and FPs) in the chassis. For more information, see
Installing and Removing Line Cards, PLIMs, and Associated
Components.
Step 10
Turn the I/O
switch at the rear of both power shelves (Power A and Power B) to the ON
position.
Step 11
If you have a
modular configuration DC power system installed, measure the input voltage of
each DC input and compare this value to the voltage measurement noted in Step
4. Verify that the equipment is still receiving the correct input voltage
measured in Step 4.
What to do next
Note
For appropriate
line card LED information, see the appropriate section in
Installing and Removing Line
Cards, PLIMs, and Associated Components or the specific documentation
for the card.
Power Down a Chassis with Modular Configuration Power
This section describes how to power down a chassis with a modular configuration AC or DC power shelf.
Steps
To power down the
chassis, perform the following steps:
SUMMARY STEPS
Turn the I/O
switches at the rear of both power shelves, Power A and Power B, to the OFF
position.
Turn off all
facility power breakers (AC or DC) for the upper power shelf (Power A) to the
OFF position. Repeat for the facility power breaker for the lower power shelf
(Power B).
DETAILED STEPS
Step 1
Turn the I/O
switches at the rear of both power shelves, Power A and Power B, to the OFF
position.
Note
There is no
required order in which you must turn off the power shelves.
Step 2
Turn off all
facility power breakers (AC or DC) for the upper power shelf (Power A) to the
OFF position. Repeat for the facility power breaker for the lower power shelf
(Power B).
Note
All DC power
cables or AC power cords must be de-energized to fully remove power from the
chassis.
What to do next
This table shows
the LED status indicator lights for the AC and DC PMs in a modular
configuration power supply.
Table 5. PM LED Status
Indicator Lights—Modular Configuration Power
LED Name
Color
Function or
Meaning
Input_OK
Green
On: The
input voltage is present and within regulation range.
Blinking:
The input voltage is present but out of regulation range.
Off: The
input voltage is not present.
Output_OK
Green
On: The
output voltage is on.
Blinking:
The PM is in a power limit or an OC condition.
Off: The
output voltage is off.
Internal
Fault
Red
On: An
internal fault is detected within the PM.
Off: The PM
has no internal fault.
Converting from One Modular Configuration Power System to Another
This section describes how to convert from one modular configuration power system to another (either from modular AC to modular
DC, or from modular DC to modular AC).
Steps
To convert an LCC
with a modular configuration power system from AC to DC power, or from DC to AC
power, perform the following steps:
SUMMARY STEPS
Power down the
chassis completely and turn the facility power breakers to the OFF position.
Remove the AC
or DC PMs.
Remove the
alarm modules.
Remove the
power shelves.
Unplug the AC
power cords or remove the DC fusing from the power source. Remove the AC or DC
wiring from the rear of the power shelf.
Install the new
power shelves.
Install the
power shelf wiring.
Install the
alarm modules.
Install the AC
or DC PMs.
Power the
chassis back up.
DETAILED STEPS
Step 1
Power down the
chassis completely and turn the facility power breakers to the OFF position.
Step 2
Remove the AC
or DC PMs.
Step 3
Remove the
alarm modules.
Step 4
Remove the
power shelves.
Step 5
Unplug the AC
power cords or remove the DC fusing from the power source. Remove the AC or DC
wiring from the rear of the power shelf.
Step 6
Install the new
power shelves.
Step 7
Install the
power shelf wiring.
Note
If you are
converting from DC to AC power, and if you have AC Delta or AC Wye at your
equipment, a
Cisco CRS PDU
will be required to convert 3-phase AC input power to
single-phase AC input power for the power shelf. For more information, see the
Cisco CRS 3-Phase AC Power Distribution Unit Installation
Guide.
Step 8
Install the
alarm modules.
Step 9
Install the AC
or DC PMs.
Step 10
Power the
chassis back up.
What to do next
Note
Use only one
type of modular configuration power shelf—AC or DC—and its mating AC or DC PM
in a chassis at one time.
Converting a Chassis from Fixed Configuration Power to Modular Configuration Power
Caution
Do not attempt to convert from fixed configuration power to modular configuration power while the LCC is powered up and running.
Ensure that you have powered down the system and all power is disconnected from the system.
This section lists the steps to be performed to convert the LCC from fixed configuration power to modular configuration power..
To convert a
chassis from fixed to modular configuration power, perform the following steps
SUMMARY STEPS
Remove the
alarm modules.
Remove the AC
rectifiers or DC PEMs.
Unplug the AC
power cords or remove the DC fusing from the power source. Remove the AC or DC
wiring from the fixed configuration power shelf.
For fixed
configuration DC only, remove the ground cable connected to the rear of the
power shelf. This ground cable will not be used when installing a modular
configuration power shelf. Remove the fixed configuration power shelves.
Install the
modular configuration power shelves.
Install the AC
or DC wiring on the rear of the power shelf.
Install the
PMs.
Install the
alarm modules.
Replace the DC
fuses or restore AC service. Power the chassis back up.
DETAILED STEPS
Step 1
Remove the
alarm modules.
Step 2
Remove the AC
rectifiers or DC PEMs.
Step 3
Unplug the AC
power cords or remove the DC fusing from the power source. Remove the AC or DC
wiring from the fixed configuration power shelf.
Step 4
For fixed
configuration DC only, remove the ground cable connected to the rear of the
power shelf. This ground cable will not be used when installing a modular
configuration power shelf. Remove the fixed configuration power shelves.
Step 5
Install the
modular configuration power shelves.
Note
Do not
connect ground cables directly to a modular configuration power shelf.
Step 6
Install the AC
or DC wiring on the rear of the power shelf.
Step 7
Install the
PMs.
Step 8
Install the
alarm modules.
Step 9
Replace the DC
fuses or restore AC service. Power the chassis back up.