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Product Number: PWR-GSR8-AC=
This document presents procedures for adding, removing, or replacing an AC-input power supply for the Cisco 12008 Gigabit Switch Router. It contains the following sections:
Use this document in conjunction with the Cisco 12008 Gigabit Switch Router Installation and Configuration Guide (document number 78-4953-01), which shipped with your Cisco 12008 Gigabit Switch Router.
Before beginning the AC-input power supply installation/replacement procedures for the Cisco 12008 router, review the safety guidelines in this section to prevent injury to yourself or damage to the equipment. This section also lists the tools that you will need to perform the installation/replacement procedures.
Figure 1 is a representation of the Cisco 12008 router.
The following list does not identify all the potentially hazardous conditions that you may encounter in the workplace; accordingly, you should be alert at all times and exercise care when working with the router's electrical and electronic components.
To ensure your safety and protect the equipment, observe the following general guidelines:
Observe the following electrical safety guidelines when working with the electrical and electronic components of the router:
In addition, observe the following guidelines when working with equipment connected to telephone wiring or other network cabling.
 | Warning Do not work on the system or connect/disconnect cables during an electrical storm. |
| Warning Before working on the router, disconnect all telephone network cables to avoid exposure to network voltages. |
Electrostatic discharge (ESD) damage to circuit boards and electronic components can occur if they are touched or handled improperly. ESD damage can result in intermittent or complete failure of electronic components.
To prevent ESD damage to router components, observe the following guidelines:
To install or replace an AC-input power supply, you will need the following:
The Cisco 12008 can operate with either one or two AC-input power supplies. Although the router supports an online insertion and removal (OIR) capability for field replaceable units (FRUs), you must observe the following rules regarding the AC-input power supplies:
The AC-input power supply for the Cisco 12008 Gigabit Switch Router provides the following operating voltages to the router backplane:
The AC-input power supply (see Figure 2) has the following characteristics:
 | Caution You cannot use an AC-input power supply and a DC-input power supply in the same chassis. |
For additional information about the AC-input power supply, refer to the document entitled Cisco 12008 Gigabit Switch Router Installation and Configuration Guide (document number 78-4953-01).
The following sections present the procedures for adding, removing, or replacing an AC-input power supply.
In the following procedure, it is assumed that you will be adding a second (redundant) AC-input power supply to the router. In this case, it is also assumed that a blank filler panel is installed in the vacant power supply bay.
The functional elements of the AC-input power supply are shown in Figure 3.
To add a second (redundant) AC-input power supply to the router, perform the following steps:
Step 1 Locate the source AC circuit breaker that will service the AC-input power supply; ensure that this circuit breaker is set to the OFF position.
For added safety, tape the circuit breaker handle in the OFF position.
Step 2 Using a 1/4-inch flat-blade screwdriver, loosen the captive installation screw on the blank filler panel covering the vacant (upper) power supply bay; remove the filler panel and retain it for possible future use.
Presumably, you will install the new power supply in the upper power supply bay, since, by convention, a single AC-input power supply is installed in the lower bay.
Step 3 Ensure that the rotary power switch on the faceplate of the new power supply that you intend to install is set to the standby (OFF) position (see Figure 3).
Step 4 Grasp the carrying handle on the new power supply with one hand; while lifting the power supply, place your free hand beneath the unit to support its weight.
| Warning The AC-input power supply weighs 17 lb (7.73 kg). For safety, use both hands to install the unit in the power supply bay. |
Step 5 Position the power supply appropriately for insertion into the vacant upper bay.
Step 6 Gently slide the unit into the bay, carefully seating it so that the power supply faceplate rests flush against the sheet metal of the power supply bay.
| Caution To prevent damage to the blind-mating connector at the rear of the power supply, do not use excessive speed or force when inserting the power supply into the bay. |
Step 7 Using a 1/4-inch flat-blade screwdriver, tighten the captive installation screw on the faceplate of the power supply (see Figure 3).
Step 8 Connect the source AC power cord to the AC receptacle on the power supply faceplate and secure the bail latch (see Figure 4) over the source AC power cord.
Step 9 Connect the other end of the source AC power cord to its power source, as shown in Figure 4.
Step 10 Set the rotary power switch on the new AC-input power supply to the ON (1) position.
To verify that the new AC-input power supply is operating properly, proceed to the section entitled "Verifying the Installation of a Power Supply," page 11.
For the following procedure, it is assumed that you will remove an AC-input power supply from a Cisco 12008 that is equipped with a single such unit. In this case, you must power down the router before removing the power supply.
It is also assumed that the power supply to be removed is installed in the lower power supply bay, which, by convention, is the normal configuration for a single power supply.
Lastly, in such a single power supply configuration, it is assumed that the vacant upper power supply bay has previously been covered by a blank filler panel to ensure EMI compliance and the proper flow of cooling air through the router. However, if such is not the case, it is recommended that you either install a second (redundant) power supply in the vacant bay or cover it with a blank filler panel.
To remove the AC-input power supply from the router, perform the following steps:
Step 1 Set the rotary power switch on the power supply faceplate to the standby (OFF) position.
Step 2 Locate and turn off the source AC circuit breaker that is currently servicing the AC-input power supply.
Step 3 Tape the circuit breaker handle in the OFF position as an added safety precaution.
Step 4 Release the bail latch that secures the source AC power cord to the AC receptacle on the power supply faceplate.
Step 5 Disconnect the source AC power cord.
Step 6 Using a flat-blade screwdriver, loosen the captive installation screw on the power supply faceplate that secures the power supply within the bay.
Step 7 With one hand, grasp the power supply carrying handle and pull the unit halfway out of the bay to disengage the female blind-mating connector at the back of the power supply from the backplane.
| Warning The AC-input power supply weighs 17 lb (7.73 kg). For safety, use both hands to remove the unit from the power supply bay. |
Step 8 Place your free hand beneath the power supply to support its weight; withdraw the unit completely from the bay.
Step 9 Set the power supply aside in a safe place, pending further disposition.
If you intend to return the removed power supply to the factory for repair or replacement, repackage the unit properly for return shipment using the original packing materials, if available.
For the following procedure, it is assumed that you will remove an AC-input power supply from a Cisco 12008 router equipped with a single such unit. In this case, you must power down the router before removing the power supply.
It is also assumed that the power supply to be removed is installed in the lower power supply bay, which, by convention, is the normal configuration for a single power supply.
Lastly, in such a single power supply configuration, it is assumed that the vacant upper power supply bay has previously been covered by a blank filler panel to ensure EMI compliance and the proper flow of cooling air through the router. However, if such is not the case, it is recommended that you either install a second (redundant) power supply in the vacant bay or cover it with a blank filler panel.
To remove the AC-input power supply from the router, perform the following steps:
Step 1 On the power supply to be replaced, set the rotary power switch to the standby (OFF) position.
Step 2 Locate and turn off the source AC circuit breaker that is currently servicing the AC-input power supply.
Step 3 Tape the circuit breaker handle in the OFF position as an additional safety precaution.
Step 4 Using a 1/4-inch flat-blade screwdriver, loosen the captive installation screw on the power supply faceplate.
Step 5 Release the bail latch that secures the source AC power cord to the AC receptacle on the power supply faceplate.
Step 6 Remove the power cord from the AC receptacle.
Step 7 Grasp the power supply carrying handle with one hand and pull the unit halfway out of the bay to disengage the blind-mating connector at the back of the power supply from the backplane.
| Warning The AC-input power supply weighs 17 lb (7.73 kg). For safety, use both hands to withdraw the unit from the bay. |
Step 8 Place your free hand beneath the power supply to support its weight; withdraw the unit completely from the bay.
Step 9 Pending further action, set the unit aside in a safe place.
If you intend to return the removed power supply to the factory for repair or replacement, repackage the unit properly for return shipment using the original packing materials, if available.
Step 10 On the new AC-input power supply that you intend to insert into the now vacant power supply bay, set the rotary power switch on the power supply faceplate to the standby (OFF) position.
Step 11 Grasp the carrying handle on the power supply with one hand; place your free hand beneath the unit to support its weight.
Step 12 Position the unit appropriately for insertion into the vacant power supply bay.
Step 13 Gently slide the new power supply into the bay, carefully seating it so that the power supply faceplate is flush against the sheet metal of the power supply bay. Doing so ensures that the blind-mating connector at the rear of the power supply is firmly seated in the backplane connector.
| Caution To prevent damage to the blind-mating connectors, do not use excessive speed or force when inserting the new power supply into the bay. |
Step 14 Using a 1/4-inch flat-blade screwdriver, tighten the captive installation screw on the power supply faceplate.
Step 15 Connect the source AC power cord to the AC receptacle on the power supply faceplate.
Step 16 Secure the bail latch over the source AC power cord to retain it in the AC receptacle.
Step 17 Set the rotary power switch on the new AC-input power supply to the ON (|) position.
To verify that the new power supply is operating properly, perform the procedure in the following section.
To verify the operation of a newly-installed AC-input power supply, you first apply power to the unit and then observe the status of the LEDs on the power supply faceplate.
To verify the operation of a newly-installed AC-input power supply, perform the following steps:
Step 1 First, verify that the following conditions have been satisfied:
Step 2 Set the rotary power switch on the newly-installed power supply to the ON position.
Step 3 Observe the behavior of the green AC INPUT OK LED on the power supply faceplate for the following conditions:
(a) The source AC circuit breaker is on.
(b) The source AC power cord is securely connected from the source AC circuit breaker to the AC receptacle on the power supply faceplate.
Step 4 Observe the behavior of the red OUTPUT FAIL LED on the power supply faceplate after applying power to the unit. This LED should flash on momentarily, then go off and remain so.
If the new AC-input power supply fails to operate properly after several attempts to power it up as described above, contact your Cisco service representative for assistance.
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