Cisco Gigabit Switch Router Cisco 12012 Manual de instrucciones de sustitución - Página 14

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Removing and Replacing a DC-Input Power Supply

If you plan to return the old power supply to the factory, repackage it in the shipping container you

received with the replacement power supply.

Replacing a Power Supply

This procedure provides the steps necessary to replace a defective DC-input power supply or install

a second DC-input power supply. If you are upgrading your Cisco 12012 with a second DC-input

power supply for power supply redundancy, you must meet the following site power and source DC

power cable requirements prior to installing the second supply:

•

If you are upgrading your Cisco 12012 with a second DC-input power supply, you must remove the

two power supply blanks covering the empty power supply bays before installing the power supply.

Perform the following steps to install a new or replacement DC-input power supply:

Caution

power supply.

Step 1

Step 2

Step 3

Step 4

Step 5

Caution

DC power supply you are removing is in the OFF position. Also verify that the power switch on the

DC-input power supply is OFF (O). As an additional check, measure the voltages across the DC

power cable leads you intend to attach to the power supply. All readings should be zero volts.

Step 6

14 Cisco 12012 Gigabit Switch Router DC-Input Power Supply Replacement Instructions

A dedicated 60-amp service is available for the second power supply.

Three power cables—4 AWG, 0.204-inch (5.18-mm) diameter, high strand count. The cable

length is dependent on your router location. This cable is not available from Cisco Systems: it is

available from any commercial cable vendor.

Three power lugs—Must be dual-hole with .625-inch (15.86-mm) centers and able to fit over M6

threaded terminals. (Refer to Figure 3.) This type of lug is not available from Cisco Systems;

electrical-connector vendors, such as Panduit, provide this type of lug.

The DC-input power supply weighs 19 lb (8.3 kg). Use two hands when handling the

Attach an antistatic wrist strap to yourself and to one of the two ESD connection sockets

located on the front edges of the upper card cage or to bare metal on the frame.

Remove the replacement DC-input power supply from its shipping container.

Verify that the power switch on the replacement power supply is in the OFF (O) position.

Loosen the two screws that secure the DC-input power supply front cover in place. Lift

up slightly, then pull the front cover away from the power supply faceplate. Set the front

cover aside. (Refer to Figure 6.)

Remove the two screws that secure the source DC power cable bracket to the power

supply faceplate and remove the bracket.

Before proceeding to the next step, verify that the source DC circuit breaker servicing the

Thread the source DC power cable leads up underneath the power supply handle. Allow

sufficient slack in the power cable for strain relief.