Cisco 2955 Installation Guide Page 83

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3-19
Catalyst 2955 Hardware Installation Guide
78-14944-03
Chapter 3 Installation
Verifying Switch Operation
To wire the switch to a DC-input power source, follow these steps:
Step 1 Locate the power and relay connector (see Figure 3-5).
Figure 3-5 Power and Relay Connector
Step 2
Identify the positive and return feed positions for the power and relay connector.
The positive DC power connection from power supply A is labeled VA, and the
return is the adjacent connection labeled RT. The positive DC power connection
from power supply B (the redundant power supply) is labeled VB, and the return
is the adjacent connection labeled RT.
Step 3 Measure two strands of twisted-pair copper wire (18 to 20 AWG) long enough to
connect to the DC power source.
Step 4 Using an 18-gauge wire-stripping tool, strip each of the two twisted pair wires
coming from each DC-input power source to 0.25 inch (6.3 mm) ± 0.02 inch (0.5
mm). Do not strip more than 0.27 inch (6.8 mm) of insulation from the wire.
Stripping more than the recommended amount of wire can leave exposed wire
from the power and relay connector after installation.
Figure 3-6 Stripping the Power Connection Wire
Step 5 Insert the exposed DC-input power source wires into the power and relay
connector, as shown in Figure 3-7. Make sure that you cannot see any wire lead.
Only wire with insulation should extend from the connector.
104353
RT
A1
A2
VB
VA
A1
A2
RT
1 0.25 in. (6.3 mm) ± 0.02 in. (0.5 mm)
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1
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