Cisco Catalyst 3550 Installation Manual page 80

Connecting to DC Power
Step 2 Identify the positive and negative feed positions for the terminal block
connection. The wiring sequence is positive to positive and negative to negative
for both the A and the B feed wires. The switch rear panel identifies the positive
and negative positions for both the A and B feed wires, as shown in
Figure 2-28 Positive and Negative Positions on the Switch Rear Panel
Using a 18-gauge wire-stripping tool, strip each of the four wires coming from the
Step 3
DC-input power source to 0.27 inch (6.6 mm) ± 0.02 inch (0.5 mm), as shown in
Figure
wire. Stripping more than the recommended amount of wire can leave exposed
wire from the terminal block plug after installation.
Figure 2-29 Stripping the DC-Input Power Source Wire
Step 4 Insert the exposed wire of one of the four DC-input power source wires into the
terminal block plug, as shown in
wire lead. Only wire with insulation should extend from the terminal block.
Warning An exposed wire lead from a DC-input power source can conduct harmful levels
of electricity. Be sure that no exposed portion of the DC-input power source
wire extends from the terminal block plug.
Catalyst 3550 Multilayer Switch Hardware Installation Guide
2-30
A
I N P U T 3
C U R R E
B
N T : 2 - 1
2-29. Do not strip more than 0.29 inch (7.4 mm) of insulation from the
0.25 in. (6.3 mm) ± 0.02 in. (0.5 mm)
Chapter 2
6 - 7 2 V
A
Figure 2-30. Make sure that you cannot see any
Installing and Starting the Switch
Figure
78-11358-03
2-28.