Cisco Systems OL-11497-03 manual Maintaining the Router Removing and Replacing a DC PEM

Chapter 6 Maintaining the Router

Removing and Replacing a DC PEM

Use the following procedure to remove and replace a DC power supply.

Caution You cannot mix power supply types within the chassis. If you are replacing a 1400 W power supply with a 1900 W power supply, you must replace both power supplies, the DC PDU, and the blower module if you are required to meet NEBS extended temperature range requirements (see the “Power Supply and PDU Compatibility” section on page 6-14for additional information). You must shut down the router to perform the upgrade. Notify the system administrator and other appropriate personnel that all routing traffic will stop while the upgrade takes place.

Step 1 Set the power switch to the Off position.

Step 2 Power off the circuit breaker assigned to the power supply.

Warning To ensure that power remains off while you are performing this procedure, tape the circuit breaker switch in the Off (0) position.

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