Cisco Systems Cisco 12008 manual Adding, Removing, or Replacing an AC-Input Power Supply

Adding, Removing, or Replacing an AC-Input Power Supply

Note It is recommended that you connect each AC-input power supply to an independent source of power with a 20A service. It is also recommended that you use an uninterruptable power source (UPS) for your site to protect against a site power failure.

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 7-3).

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.

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