3-11
Cisco CGS 2520 Hardware Installation Guide
78-19377-02
Chapter 3 Power Supply Installation
Power Supply Module Installation
DC power connection:
Connect the positive wire into the terminal screw labeled +, and the negative wire into the terminal screw
labeled –.
Make sure that you cannot see any wire lead. Only wire with insulation should extend from the terminal
screw.
Note If you have a low-voltage DC power supply module, connect the wires to the terminals labeled Lo. If you
have a high-voltage DC power supply module, connect the wires to the terminals labeled Hi.
Figure 3-14 Connecting the Wires to the Low-Voltage DC Power (PSU2)
Step 8 Torque the captive screws (above the wires) to 8.5 in-lb (± 0.5 in-lb).
Step 9 AC Power:
Connect the other end of the line wire (the one connected to L) to the line terminal on the AC-power
source, and connect the other end of the neutral wire (the one connected to N) to the neutral terminal on
the AC power source.
DC power:
Connect the other end of the positive wire (the one connected to +) to the positive terminal on the
DC-power source, and connect the other end of the negative wire (the one connected
to –) to the negative terminal on the DC power source.
Step 10 Close the power-input terminal cover. Use a ratcheting torque screwdriver to torque the screw to 6–8
in-lb.
Step 11 Turn on the power at the AC or DC circuit, verify that the PSU1 or PSU2 LED on the switch and PSU
OK LED on the power supply module are green.
Step 12 If you have two power supplies, repeat Step 1 through Step 11. See the switch software guide for
information on how to configure the power supply settings.
207428
Cisco
C
CGS
25
5
20
0