Table Of Contents
Power Supply Installation
Power Supply Module Overview
Installation Guidelines
Installing or Replacing an AC Power Supply
Installing a DC Power Supply
Equipment That You Need
Grounding the Switch
Installing the DC Power Supply in the Switch
Wiring the DC Input Power Source
Finding the Power Supply Module Serial Number
Power Supply Installation
This chapter describes how to install the power supply modules.
•
Power Supply Module Overview
•Installation Guidelines
•Installing or Replacing an AC Power Supply
•Installing a DC Power Supply
•Finding the Power Supply Module Serial Number
Power Supply Module Overview
The switch operates with either one or two active power supply modules. A Catalyst 3850 switch that is part of a StackPower stack operates with power supplied by other stack switches.
You can use two AC modules, two DC modules, one AC and one DC module, or one module and a blank cover.
All power supply modules have internal fans. All switches ship with a blank cover in the second power supply slot.
Table 4-1 describes the supported internal power supply modules.
Table 4-1 Power Supply Module Part Numbers and Descriptions
Part Number
|
Description
|
PWR-C1-1100WAC=
|
1100-W AC power supply module
|
PWR-C1-715WAC=
|
715-W AC power supply module
|
PWR-C1-350WAC=
|
350-W AC power supply module
|
CPWR-C1-440WDC=
|
440-W DC power supply module
|
PWR-C1-BLANK
|
Blank cover
|
For information on available PoE, see these sections:
•Table 1-15 (available PoE with AC power supply)
•Table 1-16 (available PoE with DC power supply)
•Table 1-17 (switch power supply requirements for PoE and PoE+)
Note A 48-port switch with one 715-W power supply provides up to 7.7 W of PoE to all ports.
The 350-W and 715-W AC power supply modules are autoranging units that support input voltages between 100 and 240 VAC. The 1100-W power supply module is an autoranging unit that supports input voltages between 115 and 240 VAC. The 440-W DC power supply module has dual input feeds (A and B) and supports input voltages between 36 and 72 VDC. The output voltage range is 51 to 57 V.
Each AC power supply module has a power cord for connection to an AC power outlet. The 1100-W and 715-W modules use a 16-AWG cord (only North America). All other modules use an 18-AWG cord. The DC power supply module must be wired to a DC power source.
Figure 4-1 to Figure 4-4 show the power supply modules.
Figure 4-1 1100-W AC Power Supply
1
|
1100-W AC power supply module
|
5
|
Release latch
|
2
|
AC OK LED
|
6
|
Power cord retainer
|
3
|
PS OK LED
|
7
|
Keying feature
|
4
|
AC power cord connector
|
|
|
Figure 4-2 715-W AC Power Supply Module
1
|
715-W AC power supply module
|
5
|
Release latch
|
2
|
AC OK LED
|
6
|
Power cord retainer
|
3
|
PS OK LED
|
7
|
Keying feature
|
4
|
AC power cord connector
|
|
|
Figure 4-3 350-W AC Power Supply Module
1
|
350-W AC power supply module
|
5
|
Release latch
|
2
|
AC OK LED
|
6
|
Power cord retainer
|
3
|
PS OK LED
|
7
|
Keying feature
|
4
|
AC power cord connector
|
|
|
Figure 4-4 440-W DC Power Supply Module
1
|
440-W DC power supply module
|
6
|
Grounding terminal
|
2
|
DC OK LED
|
7
|
Release latch
|
3
|
PS OK LED
|
8
|
Extraction handle
|
4
|
Input power terminals (positive polarity)
|
9
|
Terminal block safety cover
|
5
|
Input power terminals (negative polarity)
|
10
|
Keying feature
|
If no power supply is installed in a power supply slot, install a power supply slot cover (Figure 4-5).
Figure 4-5 Power Supply Slot Cover
1
|
Release handles
|
2
|
Retainer clips
|
The power supply modules have two status LEDs.
Table 4-2 Switch Power Supply Module LEDs
AC Power Supply Module LEDs
|
AC OK
|
Description
|
PS OK
|
Description
|
Off
(AC LED is off)
|
No AC input power.
|
Off
|
Output is disabled, or input is outside operating range.
|
Green
|
AC input power present.
|
Green
|
Power output to switch.
|
| |
|
Red
|
Output has failed.
|
DC Power Supply Module LEDs
|
DC OK
|
Description
|
PS OK
|
Description
|
Off
(DC LED is off)
|
No DC input power.
|
Off
|
Output is disabled, or input is outside operating range.
|
Green
|
DC input power present.
|
Green
|
Power output to switch.
|
| |
|
Red
|
Output has failed.
|
Installation Guidelines
Table 4-1 lists the switches and the compatible power-supply modules. Observe these guidelines when removing or installing a power supply or fan module:
•Do not force the power supply or fan module into the slot. This can damage the pins on the switch if they are not aligned with the module.
•A power supply that is only partially connected to the switch can disrupt the system operation.
•Remove power from the power-supply module before removing or installing the module.
•The power supply is hot-swappable. In some configurations, such as full PoE+ or power sharing mode, removing a power supply causes powered devices to shut down until the power budget matches the input power of a single power supply. To minimize network interruption, hot swap the power supply under these circumstances:
–The switch is in StackPower mode and sufficient power is available.
–The switch is powered by other switches in a power stack, and no active backup is in progress.
For the switch commands that display available power budget, see the software configuration guide.
Caution Do not operate the switch with one power-supply module slot empty. For proper chassis cooling, both module slots must be populated, with either a power supply or a blank module.
 |
Warning Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards, faceplates, front covers, and rear covers are in place. Statement 1029
|
|
Warning Do not reach into a vacant slot or chassis while you install or remove a module. Exposed circuitry could constitute an energy hazard. Statement 206
|
|
Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030
|
|
Warning If a Cisco external power system is not connected to the switch, install the provided connector cover on the back of the switch. Statement 386
|
Installing or Replacing an AC Power Supply
Step 1 Turn off the power at its source.
Step 2 Remove the power cord from the power cord retainer.
Step 3 Remove the power cord from the power connector.
Step 4 Press the release latch at the right side of the power supply module inward and slide the power supply out. (Figure 4-6).
Caution Do not leave the power-supply slot open for more than 90 seconds while the switch is operating.
|
Warning This unit might have more than one power supply connection. All connections must be removed to de-energize the unit. Statement 1028
|
Step 5 Insert the new power supply into the power-supply slot, and gently push it into the slot (Figure 4-6). When correctly inserted, the 350-W and 715-W power supplies (excluding the power cord retainer) are flush with the switch rear panel. The 1100-W power-supply module extends 1.5 inches from the switch rear panel.
Figure 4-6 Inserting the AC-Power Supply in the Switch
Step 6 (Optional) Make a loop in the power cord and thread it through the power cord retainer (Figure 4-7).
Figure 4-7 AC-Power Supply with Power Cord Retainer
Step 7 Connect the power cord to the power supply and to an AC power outlet. Turn on the power at the power source.
Step 8 Confirm that the power supply AC OK and PS OK LEDs are green. See Table 1-18 for a description of the power supply module LEDs.
Installing a DC Power Supply
•Equipment That You Need
•Grounding the Switch
•Installing the DC Power Supply in the Switch
•Wiring the DC Input Power Source
|
Warning An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no exposed portion of the DC-input power source wire extends from the terminal block plug. Statement 122
|
|
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003
|
|
Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 20 A. Statement 1005
|
|
Warning A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022
|
|
Warning Hazardous voltage or energy may be present on power terminals. Always replace cover when terminals are not in service. Be sure uninsulated conductors are not accessible when cover is in place. Statement 1086
|
Note The grounding architecture of this product is DC-isolated (DC-I).
Equipment That You Need
•Ratcheting torque screwdriver with a number-2 Phillips head that exerts up to 15 pound-force inches (lbf-in.) of pressure.
•Panduit crimping tool with optional controlled-cycle mechanism (model CT-720, CT-920, CT-920CH, CT-930, or CT-940CH).
•Wire-stripping tools.
•12-gauge copper ground wire (insulated or not) for the single-ground connection.
•8-gauge copper ground wire (insulated or not) for the dual-ground connection.
•Ground lug screw (not included in the accessory kit) and ring lug connector in the switch accessory kit. For a dual-ground connection, also use the dual-ground adapter and dual lug connector.
•Four leads of 14-gauge copper wire.
•Four fork-type terminals from the DC power supply accessory kit. The terminals must be the proper size for M3 screws in a Dinkle DT-35-B25-style terminal block.
Grounding the Switch
Follow the grounding procedures at your site and observe these warnings:
|
Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024
|
|
Warning When installing or replacing the unit, the ground connection must always be made first and disconnected last. Statement 1046
|
Caution Follow the grounding procedure instructions, and use a UL-listed lug (included in the accessory kit).
Follow these steps to install either a single-ground lug or a dual-ground lug on the switch. Make sure to follow any grounding requirements at your site.
Step 1 Use the ground lug screw and the lug ring for a single-ground connection. Use the dual-ground adapter and dual-hole lug for a dual-ground connection.
Step 2 Strip the 12-gauge or 8-gauge ground wire to 0.5 inch (12.7 mm) ± 0.02 inch (0.5 mm) (Figure 4-8). Stripping more than the recommended amount of wire can leave exposed wire from the connector. Use 12-gauge copper ground wire for the single-ground connection. Use 8-gauge copper ground wire for the dual-ground connection.
Figure 4-8 Stripping the Ground Wire
Step 3 Slide the open end of the ground lug over the exposed area of the wire.
Step 4 Using a Panduit crimping tool, crimp the ground lug to the wire (Figure 4-9).
Figure 4-9 Crimping the Ground Lug
Step 5 Use the ground screw to attach the single-ground lug to the switch rear panel. Use two ground screws to attach the dual-hole lug to the switch rear panel (Figure 4-10).
Step 6 Using a ratcheting torque screwdriver, torque the ground-lug screws to 60 lbf-in. (960 ozf-in.).
Step 7 Connect the other end of the grounding wire to an appropriate grounding point at your site or to the rack.
Figure 4-10 Attaching the Ground Lug and Wire Assembly
1
|
Single-ground screw and lug ring
|
2
|
Dual-ground adapter and dual-hole lug
|
Installing the DC Power Supply in the Switch
Before installing the power supply, see the Installation Guidelines.
Step 1 Turn off DC power. To ensure that power is off, change the circuit breakers to the OFF position, and tape the circuit-breaker switches in the OFF position.
Step 2 Remove the plastic safety cover from the power supply terminal blocks (Figure 4-4).
If you are not replacing a DC power supply, go to Step 5.
Step 3 Use a number-2 Phillips screwdriver to remove the DC-input power wires from the power terminals.
Step 4 Press the release latch at the right side of the power supply module inward, and pull the power supply out.
Step 5 Insert the power supply in the power-supply slot, and gently push it into the slot (Figure 4-11). When correctly installed, the DC power supply (excluding the extraction handle) is flush with the switch rear panel.
Figure 4-11 Inserting the DC Power Supply in the Switch
Step 6 Connect the input power as described in the "Wiring the DC Input Power Source" section.
Wiring the DC Input Power Source
Step 1 Using a wire-stripping tool, strip each of the four wires from the DC-input power source to the appropriate length for the terminals.
|
Warning Use copper conductors only. Statement 1025
|
Step 2 Using a Panduit crimping tool, crimp the fork-type terminals to the copper conductor, 90C, 14-AWG DC power input wires.
Step 3 Connect the DC-input power terminals to the terminal blocks. See Figure 4-12 or Figure 4-13. Make sure to match the polarity (negative to negative, positive to positive) when connecting the wires to the terminal blocks. Connect the ground wire to a grounded metal rack or to earth ground if the switch is not in a grounded rack.
Figure 4-12 DC Source A Isolated From Source B with No Common Ground
Figure 4-13 DC Source A and Source B Connections with Common Ground
Step 4 Torque all terminal block screws to 11 lbf-in.
Step 5 Replace the terminal block safety cover.
Step 6 Move the DC power source circuit-breakers to the ON position.
Step 7 Confirm that the power supply DC OK and PS OK LEDs are green. See Table 4-2 for a description of the module LEDs.
Finding the Power Supply Module Serial Number
If you contact Cisco Technical Assistance regarding a power supply module, you need to know the serial number. See Figure 4-14 to Figure 4-16 to find the serial number. You can also use the CLI to find out the serial number.
Figure 4-14 1100-W AC Power Supply Serial Number
Figure 4-15 715-W and 350-W AC Power Supply Module Serial Number
Figure 4-16 440-W DC Power Supply Module Serial Number
Feedback
