Cisco Systems 4500 manual 78-14409-08

Chapter 4 Removing and Replacing FRUs

Removing and Replacing the Power Supply

Follow these steps to install a DC-input power supply, connect it to a power source, and verify its operation:

Step 1 Verify that power is off to the DC circuit or circuits on the power supply you are installing.

Step 2 Grasp the power supply handle with one hand. Place your other hand underneath it as you slowly insert the power supply into the bay (as shown earlier in Figure 4-16).

Step 3 Using a screwdriver, tighten the captive screws on the power supply (see Figure 4-15).

Step 4 Before you connect the power supply to a power source, ensure that all site power and grounding requirements have been met.

Step 5 Connect the DC-input wires to the power supply terminal block. The proper wiring sequence is ground to ground, positive to positive, and negative to negative (see Figure 4-13or Figure 4-14depending on your installation).

The 1400W triple-input power supply has two grounding posts; use the one that is most convenient for your installation.

Warning When installing or replacing the unit, the ground connection must always be made first and disconnected last. Statement 1046

Step 6 Replace the terminal cover.

Step 7 Connect the other end of the power cords to a DC-power input source.

Caution In a system with multiple power supplies or a single triple-input power supply, connect each power supply to a separate DC power source. In the event of a power source failure, if the second source is still available, it can maintain maximum overcurrent protection for each power connection.

	Catalyst 4500 Series Switches Installation Guide
78-14409-08		4-17