Cisco Firepower 4100 Series Hardware Installation Manual page 71

Maintenance and Upgrade
Note To avoid hazardous conditions, all components in the area where DC input power is accessible must be
properly insulated. Therefore, before installing the DC cable lugs, be sure to insulate the lugs according to
the manufacturer's instructions
This procedure describes how to install the DC power supply input power leads to the Firepower 4100 DC
input power supply on the rear PDU of the chassis.
Before you begin
• The color coding of the DC input power supply leads depends on the color coding of the DC power
• For DC input power cables, the wire gauge is based on the National Electrical Code (NEC) and local
• Tools needed:
Step 1
Install the DC power supply module in the chassis and make note of the bay number so you can connect the wiring to
the correct terminals on the DC power supply module at the rear of the chassis. See
Supply Module, on page 61
Step 2 Verify that the power is off to the DC circuit on the power supply module that you are installing.
Step 3
Make sure that all site power and grounding requirements have been met.
Step 4 To remove the plastic cover from the terminal block, insert a flat screw driver on the side of the plastic cover and pry
it off.
source at your site. Make sure that the lead color coding you choose for the DC input power supply
matches the lead color coding used at the DC power source and verify that the power source is connected
to the negative (–) terminal and to the positive (+) terminal on the power supply.
codes for 26 amp service at nominal DC input voltage (–40/–72 VDC). One pair of cable leads, source
DC (–) and source DC return (+), are required for each power distribution unit (PDU). These cables are
available from any commercial cable vendor. All DC input power cables for the chassis should be 10gauge
wire and cable lengths should match within 10 percent of deviation.
• Phillips head screwdriver
• 10-mm wrench or socket
• Connectors and wire for the DC circuit or circuits
for the procedure.
Cisco Firepower 4110, 4120, 4140, and 4150 Hardware Installation Guide
Connect the DC Power Supply Module
Remove and Replace the Power
67