Cisco Systems 7609 manual Installing a DC-Input Power Supply

Chapter 5 Removal and Replacement Procedures

Removing and Replacing the Power Supply

Installing a DC-Input Power Supply

Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position.

Note You must isolate the DC return connection from the system frame and chassis.

Follow these steps to install a DC-input power supply:

Step 1 Ensure that the system (earth) ground connection has been made. For ground connection installation instructions, see the “System Ground Connection” section on page 3-12.

Step 2 Verify that power is off to the DC circuit on the power supply you are installing.

Step 3 Verify that the power switch is in the Off (0) position on the power supply you are installing. (See Figure 5-3.)

Caution Use both hands to install and remove power supplies. Each Cisco 7609 Internet Router DC-input power supply weighs between 22 pounds (9.9 kg) and 28 pounds (12.6 kg).

Step 4 Grasp the power supply handle with one hand and place your other hand underneath the power supply. Slide the power supply into the power supply bay. Make sure that the power supply is fully seated in the bay. (See Figure 5-5.)

Step 5 Tighten the power supply captive installation screw. (See Figure 5-3.)

Step 6 Remove the two screws securing the terminal block cover and slide the cover off of the terminal block. (See Figure 5-3.)

Step 7 Attach the appropriate lugs to the DC-input wires. The maximum width of a lug is 0.300 inch (7.6 mm). The wire should be sized per local and national installation requirements. Use only copper wire.

	Cisco 7609 Internet Router Installation Guide
5-10	OL-5079-04