Cisco Catalyst 2955 Hardware Installation Manual page 86

Verifying Switch Operation
Connect the other end of the wire connected to VA to the positive pole on the DC
Step 7
power source, and connect the other end of the wire connected to RT to the return
pole on the DC power source.
Note
Figure 3-9
for a primary power supply and an optional secondary power supply.
Catalyst 2955 Hardware Installation Guide
3-22
If you are connecting a second power supply, repeat
for the DC-input (VB) and return (RT) for power supply B.
shows the completed DC-input wiring on a power and relay connector
Chapter 3 Installation
Step 4 through Step 7
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