Cisco Systems Cisco 12008 manual Removing a DC-Input Power Supply

Adding, Removing, or Replacing a DC-Input Power Supply

Step 17 Set the circuit breaker to the ON position.

Step 18 Set the rotary power switch on the new DC-input power supply to the ON () position.

To verify that the new DC-input power supply is operating properly, proceed to the section below entitled “Verifying the Installation of a DC-Input Power Supply.”

Removing a DC-Input Power Supply

For the following procedure, it is assumed that you will be removing a DC-input power supply from a Cisco 12008 router that is equipped with a single such unit. In this case, you must power down the router before removing the power supply.

It is assumed further that the power supply to be removed is installed in the lower power supply bay, which, by convention, is the recommended bay for installing a single power supply.

To remove the DC-input power supply from the router, perform the following steps:

Step 1 Set the rotary power switch on the power supply faceplate to the OFF (O) position.

Note Turning the power supply switch counterclockwise to the OFF (O) position also releases the mechanical interlock (latching mechanism) that secures the power supply in the bay.

Step 2 Locate and turn off the source DC circuit breaker that is servicing the DC-input power supply.

Step 3 Tape the circuit breaker handle in the OFF position as an added safety precaution.

Step 4 Remove the plastic safety shield (see Figure 7-7) that covers the alarm terminal block and the positive (+) and negative (–) terminals on the power supply faceplate.

Maintaining the Cisco 12008 7-29