Table Of Contents
Replacing the Power Supply
Overview
Safety Recommendations
Required Tools and Equipment
Removing the Chassis Cover
Removing the Old Power Supply
Installing the Power Supply
Replacing the Chassis Cover
Replacing the Power Supply
This appendix includes information on how to replace the power supply for the Cisco AS5350 and contains the following sections:
•
Safety Recommendations
•Required Tools and Equipment
•Removing the Chassis Cover
•Removing the Old Power Supply
•Installing the Power Supply
•Replacing the Chassis Cover
Overview
The Cisco AS5350 universal gateway can have a single AC or DC power supply or a redundant AC or DC power supply.
Note The redundant power supply is supported in Cisco IOS Release 12.2(2)XB5 or later releases.
Safety Recommendations
Note the following safety recommendations:
Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
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. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Warning Only trained and qualified service personnel should be allowed to install or replace this equipment. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that a UL Listed and Certified fuse or circuit breaker no larger than 60 VDC, 15 A is used on all current-carrying conductors. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
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 universal gateway chassis to gain access to its interior components.
To open the chassis cover, follow this procedure:
Step 1 Turn the power switch on the universal gateway off and disconnect site power.
Note Note that the power switch is part of the power supply.
Note If you are using a DC-powered unit, refer to Figure B-1 or Figure B-2 and complete the Step a through Step d.
Warning Before performing any of the following procedures, 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. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Figure B-1 DC Power Supply Connections—Single Power Supply
Figure B-2 DC Power Supply Connections—Redundant Power Supply
a. Loosen the five locking screws for the negative, return, and ground connectors on the DC connector.
b. Remove the +48 VDC return wires from the DC connectors.
c. Remove the -48 VDC wires into the DC negative connectors.
d. Remove the safety ground wire from the DC connector.
Step 2 Remove all interface cables from the rear panel of the universal gateway.
Step 3 Place the universal gateway so that the front panel is facing you.
Step 4 Remove the five screws on the chassis cover. (See Figure B-3.)
Figure B-3 Removing the Chassis Cover Screws
Step 5 Gently pry the cover off with a flat-blade screwdriver. Lift the chassis cover upward, as shown in Figure B-4, and pull it away from the tabs on the rear of the chassis.
Figure B-4 Removing the Chassis Cover
Step 6 Continue with the "Removing the Old Power Supply" section.
Removing the Old 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. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Warning Only trained and qualified personnel should be allowed to install or replace this equipment. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Warning Read the installation instructions before you connect the system to its power source. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Warning Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
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. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
To remove the power supply, follow this procedure:
Step 1 Place the universal gateway so that the rear panel is facing you.
Step 2 Remove the mounting screw that secures the power supply to the chassis and set it aside. (See Figure B-5 or Figure B-6.)
Note Although the following illustrations show only the AC power supply, the procedures are the same for the DC power supply.
Figure B-5 Removing the Mounting Screw on the Single AC Power Supply
Figure B-6 Removing the Mounting Screw on the Redundant AC Power Supply
Step 3 Turn the universal gateway so that the front panel is facing you.
Step 4 Lift the air separator out of the chassis. (See Figure B-7.)
Figure B-7 Removing the Air Separator
Note There are two power connectors on the power supply. One connects to the backplane and the other to the system board. (See Figure B-8.)
Figure B-8 Power Supply Connectors
Step 5 Disconnect both power supply connectors. Disconnect the backplane connector first, followed by the system board connector. (See Figure B-9.)
Note The system board connector is located on the system board, below and left of the backplane connector.
Figure B-9 Disconnecting the Power Connectors from the Backplane
Step 6 Slide the power supply toward the front panel to disengage the power supply from the chassis hooks. (See Figure B-10.) Remove the power supply from the chassis.
Figure B-10 Lifting the Power Supply Out of the Chassis
Installing the Power Supply
To install the power supply, follow this procedure:
Step 1 Place the power supply as shown in Figure B-11, then slide it toward the rear panel. You will be able to feel the chassis hooks engage with the slots on the bottom of the power supply. The same procedure applies to both the AC and DC power supplies.
Figure B-11 Inserting the Power Supply in the Chassis
Step 2 Connect the two power connectors to the system board and backplane. (See Figure B-8.) Connect the system board connector first, followed by the backplane connector. (See Figure B-12.)
Note The system board connector is located on the system board, below and left of the backplane connector.
Figure B-12 Reconnecting the Power Cables to the Backplane
Step 3 Replace the air separator, holding all cables to the right of the separator as you slip it into the chassis. (See Figure B-13.)
Figure B-13 Replacing the Air Separator
Step 4 Reinstall the power supply mounting screw.
Step 5 Replace the chassis cover using the procedures in the "Replacing the Chassis Cover" section.
Replacing the Chassis Cover
To replace the chassis cover, follow this procedure:
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, as shown in Figure B-14.
Figure B-14 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.
Step 4 Secure the chassis cover with five screws.
Step 5 If you installed a different type of power supply (AC or DC) than was originally installed in the universal gateway, place one of the power ratings labels that came in the plastic bag with the documentation directly over the power ratings information on the rear panel. For example, if the original chassis came with an AC power supply and you replaced it with a DC power supply, place the DC power ratings label over the ratings stamped on the rear panel of the chassis. This will ensure that the correct power ratings information appears on the rear panel. (See Figure B-15 and Figure B-16.)
Figure B-15 Power Ratings Label for DC Power Supply
INPUT -48/-60V == 3A 150VA
|
Figure B-16 Power Ratings Label for AC Power Supply
INPUT 100 - 240V~ 50/60Hz 2 - 1A
|
Step 6 Reinstall the chassis on a rack, desktop, or table.
Step 7 Reinstall all interface cables.
Step 8 Reconnect the AC power cord. Or, if you are using a DC-powered unit, refer to Figure B-17 or Figure B-18, and complete the steps appropriate for each power supply.
Warning The illustration shows the DC power supply terminal block. Wire the DC power supply using the appropriate wire terminations at the wiring end, as illustrated. The proper wiring sequence is ground to ground, return to return, and negative to negative. Note that the ground wire should always be connected first and disconnected last. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Figure B-17 Connecting DC Power Supply—Single Power Supply
a. Connect the DC connector to the rear of the power supply.
Caution Do not overtorque the terminal block contact screws. The recommended torque is 4.5 lb-in (0.50 N-m).
Figure B-18 Connecting DC Power Supply—Redundant Power Supply
Note This product is intended for installation in restricted access areas and is approved for connection using 12 or 14 AWG copper conductors only. The installation must comply with all applicable codes.
Note For central office installations, it is recommended to use a 6 AWG green ground wire with one end connected to reliable earth. The other end of the wire should be crimped onto the double-hole lug provided in the installation pack. The lug should be secured to the mating holes on the side of the chassis with the two screws included in the accessory pack.
Note If you are installing a redundant power supply, you should attach appropriate sized spade terminals to the stripped ends of the ground and input wires.
a. Insert the safety ground (green wires) into the DC connector ground connector and tighten the locking screw. Ensure that no bare wire is exposed.
b. Insert the +48 VDC return wires into the DC connectors (+) and tighten the locking screws. Ensure that no bare wire is exposed.
c. Insert the -48 VDC wires into the DC negative connectors (-) and tighten the locking screws. Ensure that no bare wire is exposed.
d. Make sure that the power supply wires are secured to cable strain-relief clamps 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. To see translations of the warnings that appear in this publication, refer to the Regulatory Compliance and Safety Information document that accompanied this device.
Step 9 Power on the universal gateway.
The internal power supply fan should power on.
