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Cisco CGS 2520 Hardware Installation Guide
OL-31444-01
Chapter 3 Power Supply Installation
Removing the Power Supply Module
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.
Removing the Power Supply Module
The power supply modules are hot-swappable. By removing the power supply modules, you can power
off the switch without disconnect the wiring from the power-input terminal.
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