Cisco 3110 Hardware Installation Manual page 78

Connect the DC Power Supply Module
1 Release tab
If the slot is to remain empty, install a blank faceplate to ensure proper airflow and to keep dust out of the chassis;
otherwise, install another power supply module.
Step 5 To replace a power supply module, hold the power supply module with both hands and slide it into the power supply
module bay.
Step 6 Push in the power supply module gently until you hear the release tab engage and the power supply is seated.
Step 7
Plug in the power supply cable.
Step 8 Check the LED on the power supply to make sure the power supply is operative. See
for a description of the LEDs.
Connect the DC Power Supply Module
The input connector and plug must be UL recognized under UL 486 for field wiring. The connection polarity
is from left to right: negative (–), positive (+), and ground.
Use the handle on the power supply installation and removal. You must support the module with one hand
because of its length.
Figure 50: DC Power Supply Module
1
3
Cisco Secure Firewall 3110, 3120, 3130, and 3140 Hardware Installation Guide
74
Handle
DC power connector
Installation, Maintenance, and Upgrade
Handle
Power Supply Module, on page 24
2 FAIL and OK LEDs
Ejector latch
4