Cisco AS5400XM Universal Gateway Chassis Installation Guide
Replacing the Power Supply
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Replacing the Power Supply

Table Of Contents

Replacing the Power Supply

Safety Recommendations

Required Tools and Equipment

Removing the Chassis Cover

Removing the Power Supply

Installing the Power Supply

Replacing the Chassis Cover

Verifying the Status of the Redundant Power Supply

Configuring the Power Supply Alarm

Verify Power Supply Alarm Configuration


Replacing the Power Supply


This appendix includes information on how to replace the power supply for the Cisco AS5400XM universal gateway.

Safety Recommendations

Required Tools and Equipment

Removing the Chassis Cover

Removing the Power Supply

Installing the Power Supply

Replacing the Chassis Cover

Verifying the Status of the Redundant Power Supply

Configuring the Power Supply Alarm

The Cisco AS5400XM universal gateway has a redundant power supply. A redundant power supply has two power cords to provide higher reliability and load balancing. You can use the redundant power supply to:

Manage your system with alarms and other management features.

Provide higher reliability with a second built-in power supply connected to a second power source.

Balance loads.

Safety Recommendations

Note the following safety recommendations:


Warning Before opening the unit, disconnect the telephone-network cables to avoid contact with telephone-network voltages. Statement 1041



Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001



Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. Statement 12



Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43



Warning Only trained and qualified personnel should be allowed to install or replace this equipment. Statement 49



Caution Before opening the chassis, ensure that you have discharged all static electricity from your body, and be sure that the power is off.

Required Tools and Equipment

You need the following tools and equipment:

Medium-size Phillips screwdriver

Small or medium flat-blade screwdriver

ESD-preventive wrist strap

Tie-wraps (optional)

Antistatic bag (optional)

Removing the Chassis Cover

You must open the chassis to gain access to its interior components.

To remove the chassis cover, follow these steps:


Step 1 Turn the power switch off and disconnect site power. (Note that the power switch is part of the power supply.)


Note If you are using a DC-powered unit, see Figure B-1 and complete Step a through d.



Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003



Warning Before connecting or disconnecting ground or power wires to the chassis, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position. Statement 140


Figure B-1 DC Power Supply Connections

a. Loosen the six locking screws for the negative, return, and ground connectors on the DC power supply terminal blocks.

b. Remove the -48 VDC wires from the terminal block negative connectors (-).

c. Remove the 48 VDC wires from the terminal block positive connectors (+).

d. Remove the safety ground (green wires) from the terminal block ground connectors.


Caution Do not connect the 48 VDC wire to the chassis. A single-point ground is recommended at the power distribution rack.

Step 2 Remove all interface cables from the rear of the chassis.

Step 3 Place the chassis so that the front panel is facing you.

Step 4 Remove the four screws on the chassis cover. (See Figure B-2.)

Figure B-2 Removing the Chassis Cover Screws

Step 5 Gently pry the cover off with a flat-blade screwdriver. Lift the chassis cover upward, and pull it away from the tabs on the rear of the chassis. (See Figure B-3.)

Figure B-3 Removing the Chassis Cover


Removing the Power Supply

This section describes how to remove the power supply. Note the following safety warnings before you remove the power supply:


Warning Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040



Warning Only trained and qualified personnel should be allowed to install or replace this equipment. Statement 49



Warning Read the installation instructions before connecting the system to the power source. Statement 1004



Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord. Statement 1



Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43



Caution If the power supply unit was originally fitted with the AS54XM-AC-RPS and during the power supply unit's lifecycle is exchanged to the AS54XM-DC-RPS, Cisco IOS will report that the AS54XM-AC-RPS is still installed.

For this reason, Cisco does not recommend replacing the AC power supply with the DC power supply, or the DC power supply with the AC power supply.

To remove the power supply, follow these steps:


Step 1 Place the chassis so that the rear panel is facing you.

Step 2 Remove the three mounting screws that secure the power supply to the chassis and set them aside. (See Figure B-4.)

Figure B-4 Removing the Power Supply Mounting Screws

Step 3 Turn the chassis so that the front panel is facing you.

Step 4 Lift the air separator out of the chassis. (See Figure B-5.)

Figure B-5 Removing the Air Separator

Step 5 Pull the fan closest to the power supply away from the sheet metal tabs. (See Figure B-6.)

Figure B-6 Pulling the Fan Away from the Tabs

Step 6 Lift the fan out of the chassis, and set the fan on top of the power supply. (See Figure B-7.)

Figure B-7 Removing the Fan


Caution Do not attempt to remove the fan cables without first depressing the tab as shown in Figure B-8. You can damage the fan cables by applying stress if the connector is not removed properly.

Step 7 Disconnect the fan cable, and set aside the fan. (See Figure B-8.)

Figure B-8 Disconnecting the Fan Cable

Step 8 Remove the next fan and disconnect its cable.

Step 9 Remove the cables for the two remaining fans. You can disconnect these cables without removing the fans.


Note There are three different lengths of 2-wire, 12 VDC power cables. The two shortest cables go to the fan that you removed in Step 6. The two longer cables go to the three remaining fans removed in Step 8 and Step 9. The remaining cable goes to the power connector on the backplane.

These cables are color-coded. If you use an incorrect cable to connect a fan or the backplane, then you will be unable to make one of the other connections. To help with reconnecting the cables, write down which colored cable goes to each fan.


Step 10 Disconnect the power connectors from the backplane. First disconnect the 2-pin 12V connector and then disconnect the 4-jack harness of the power connector. (See Figure B-9.)

Figure B-9 Disconnecting the Power Connectors from the Backplane

Step 11 Disconnect the 6-pin connector from the system board. (See Figure B-9.)

Step 12 Slide the power supply toward the front panel to disengage the power supply from the chassis hook, and remove the power supply from the chassis. (See Figure B-10.)

Figure B-10 Lifting the Power Supply Out of the Chassis


Installing the Power Supply

A redundant power supply has two power cords to provide higher reliability and load balancing. Use the redundant power supply for these tasks:

To manage your system with alarms and other management features

To provide a higher reliability with a second built-in power supply

To balance loads

To install the redundant power supply, follow these steps:


Step 1 Place the redundant power supply in the chassis, and slide it toward the rear panel. You will be able to feel the chassis hook engage with the slot on the bottom of the power supply. (See Figure B-11.)

Figure B-11 Inserting the Power Supply in the Chassis

Step 2 Connect the 6-pin connector to the system board. (See Figure B-12.)


Note For clarity, the illustration does not show the fans in place or the fan cables.


Figure B-12 Connecting the 6-Pin Connector to the System Board

Step 3 Reconnect the 4-jack harness of the power connector, and then reconnect the 2-pin 12V connector. (See Figure B-13.)

Figure B-13 Reconnecting the Power Cables to the Backplane

Step 4 Route the fan cables as shown in Figure B-14. Note that the two longest cables are connected to the two installed fans on the right. The connectors to these two fans will fit into the space between the second and third fans.


Caution Route the fan cables carefully to avoid pinching the cables near the bridge lance. (See Figure B-14.)

Figure B-14 Routing the Fan Cables

Step 5 Insert the second fan, making sure that the fan cable feeds to your left. Position the cables to the two installed fans so that they will fit under the first and second fans. Press the fan into place between the four sheet metal tabs. (See Figure B-14.)

Step 6 Reconnect the two 2-pin fan cables to the remaining fan. (See Figure B-15.)

Figure B-15 Reconnecting the Fan Cables

Step 7 Reinstall the remaining fan. Make sure you orient the fan so that the cables feed to the right (toward the second fan). Route the cable completely under the fan before you reconnect it. This takes up the extra length of fan cable and keeps it out of the way.

When correctly assembled, the cables appear as shown in Figure B-16.

Figure B-16 Correct Fan Cable Routing

Step 8 Replace the air separator, holding all cables to the right of the separator as you slip it into the chassis. (See Figure B-17.)

Figure B-17 Replacing the Air Separator

Step 9 Turn the chassis so that the rear panel faces you, and reinstall the three mounting screws that secure the power supply to the chassis. (See Figure B-18.)

Figure B-18 Replacing the Redundant Power Supply Mounting Screws

Step 10 Replace the chassis cover, as described in the "Replacing the Chassis Cover" section.


Replacing the Chassis Cover

To replace the chassis cover, follow these steps:


Step 1 Place the chassis bottom so that the front panel is facing you.

Step 2 Hold the chassis cover over the chassis bottom, and align each of the cover tabs with the chassis tabs at the top rear of the chassis. (See Figure B-19.)

Figure B-19 Replacing the Chassis Cover

Step 3 Lower the front of the top cover to close the chassis, and ensure the following:

The chassis cover tabs fit under the edge of the chassis rear panel so that they are not exposed.

The chassis tabs fit under the chassis cover so that they are not exposed.

The chassis cover side tabs on both sides fit inside the chassis side panels so that they are not exposed.

When the chassis cover is properly assembled, no tabs are visible. (See Figure B-20.)

Figure B-20 Cisco AS5400XM Universal Gateway Chassis

Step 4 Secure the chassis cover with four screws. (See Figure B-19.)

Step 5 Reinstall the chassis on a rack, desktop, or table.

Step 6 Reinstall all interface cables.

Step 7 Reconnect the AC power cord. Or, if using a DC-powered unit, see Figure B-21, and complete Step a through Step d.


Warning The illustration shows the DC power supply terminal block. Wire the DC power supply using the appropriate lugs at the wiring end, or with no lugs, as illustrated. The proper wiring sequence is ground to ground, positive to positive, and negative to negative. Note that the ground wire should always be connected first and disconnected last. Statement 197


Figure B-21 DC Power Supply Connections


Caution Do not overtorque the terminal block contact screws. The recommended torque is 5.0 in.-lb (0.56 N-m).

a. Insert the safety ground (green wires) into the terminal block ground connectors and tighten the locking screws. Ensure that no bare wire is exposed.

b. Insert the 48 VDC Return wires into the terminal block positive connectors (+) and tighten the locking screws. Ensure that no bare wire is exposed.

c. Insert the -48 VDC wires into the terminal block negative connectors (-) and tighten the locking screws. Ensure that no bare wire is exposed.

d. Make sure the power supply cords are secured to the cable strain-relief clamps on the DC power supply with cable ties.


Warning After wiring the DC power supply, remove the tape from the circuit breaker switch handle and reinstate power by moving the handle of the circuit breaker to the ON position. Statement 8



Note You can order a Y-connector (CAB-AC-Y) to plug into both power connectors on the power supply. If you use this Y-connector, you remove the backup feature of this power supply by eliminating redundant operations and reducing reliability. We highly recommend that you use both power cords whenever possible.


Step 8 Power up the universal gateway.

The internal power supply fan should power up. If you are using a redundant power supply, the six green LEDs on the front of the power supply should light. If any LED is not lit, consult the appropriate redundant power supply software message to determine where the problem is located.


Verifying the Status of the Redundant Power Supply

To display the current status of the redundant power supply unit, enter the show environment command.

5400# show environment
Temperature:
        Temperature Reading:
                Temperature at inlet is measured as 29C/84F.
                Temperature at outlet is measured as 39C/102F.
        Temperature State:
                Temperature is in normal state.

Voltage:
        Voltage Reading:
                MAX6656-1 Internal 3.3 Volt is measured as 3259.
                Motherbd 5V is measured as 5228.
                CPU Core 1.2V is measured as 1160.
                Memory 2.5V is measured as 2476.
                MAX6656-2 Internal 3.3 Volt is measured as 3259.
                PHY 2.5V is measured as 2300.
                HT, Crush FPGA 1.8V is measured as 1833.
                PLD 1.5V is measured as 1443.
        Voltage State:
                Voltage is in 0 state.
Fans:
        Fans temperature delta is measured as 10C.
        All fans are running well.
Power Supply:
        Redundant Power System is not present.
        PS Input Voltage status:  normal
        PS Output Voltage status:  normal
        PS Fan status:  normal
        PS Thermal status:  normal
        PS OverVoltage status:  normal

Configuring the Power Supply Alarm

Cisco IOS software can be configured to poll every second to detect the failure of the redundant power supply. By default, the facility alarm is off. To begin monitoring of the redundant power supply, enter the facility-alarm detect command. Enter the no version of the command to disable the alarm.

To configure alarm support for the redundant power supply, follow these steps:

Step
Command
Purpose

Step 1 

Router> enable
Password: password

Router#

Enters enable mode. Enter the password.


You have entered enable mode when the prompt changes to Router#.

Step 2 

Router# configure terminal

Enters global configuration mode.

Step 3 

Router(config)# facility-alarm detect rps

Turns on an alarm when a redundant power supply failure is detected. Any of the following failures will turn on the alarm:

Input power voltage failure

Output power voltage failure

Overvoltage condition

Multiple failures

Verify Power Supply Alarm Configuration

To verify the status of the power supply alarm configuration, enter the show facility-alarm command:

5400# show facility-alarm

    Device            State
    ------            -----
 
  GigabitEthernet0/0   UP
  Modem Card 4         UP
 
 Facility Alarm is ON


Note For information on connecting alarm devices to the alarm port on the Cisco AS5400XM universal gateway, see the "Connecting to the Alarm Port" section on page 3-11.