Cisco CAtalyst 4500 Series Installation Manual page 131

Chapter 4 Removing and Replacing FRUs
Follow these steps to install a DC-input power supply, connect it to a power
source, and verify its operation:
Verify that power is off to the DC circuit or circuits on the power supply you are
Step 1
installing.
Grasp the power supply handle with one hand. Place your other hand underneath
Step 2
it as you slowly insert the power supply into the bay (as shown earlier in
Figure
Using a screwdriver, tighten the captive screws on the power supply
Step 3
(see
Before you connect the power supply to a power source, ensure that all site power
Step 4
and grounding requirements have been met.
Connect the DC-input wires to the power supply terminal block. The proper
Step 5
wiring sequence is ground to ground, positive to positive, and negative to negative
(see
The 1400W triple-input power supply has two grounding posts; use the one that
is most convenient for your installation.
When installing or replacing the unit, the ground connection must always be
Warning
made first and disconnected last. Statement 1046
Replace the terminal cover.
Step 6
Connect the other end of the power cords to a DC-power input source.
Step 7
In a system with multiple power supplies or a single triple-input power supply,
Caution
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.
78-14409-08
4-16).
Figure 4-15).
Figure 4-13 or Figure 4-14
Removing and Replacing the Power Supply
depending on your installation).
Catalyst 4500 Series Switches Installation Guide
4-17