Cisco Firepower 2120 Hardware Installation Manual page 54

Connect the DC Power Supply Module
• Make sure that the chassis ground is connected on the chassis before you begin installing the DC power
Step 1
Verify that the power is off to the DC circuit on the power supply module that you are installing.
Step 2 While supporting the power supply module with one hand, insert the power supply module into the power supply bay
and gently push it in. See the illustration above for the location of the handle.
Step 3
Use a wire-stripping tool to strip each of the 2 wires coming from the DC input power source. Strip the wires to
approximately 0.39 inch (10 mm) + 0.02 inch (0.5 mm). We recommend you use 14 AWG insulated wire.
Do not strip more than the recommended length of wire because doing so could leave the wire exposed from
Note
the terminal block.
Figure 24: Stripped DC Input Source Wire
Step 4 Insert the exposed wire into the terminal block. Ensure that you cannot see any wire lead outside the plastic cover. Only
wires with insulation should extend from the terminal block.
Step 5 Use a screwdriver to tighten the terminal block captive screws.
Do not overtorque the terminal block captive screws. Make sure that the connection is snug, but the wire is
Caution
not crushed. Verify by tugging lightly on each wire to make sure that they do not move.
Cisco Firepower 2100 Series Hardware Installation Guide
50
supply. See Ground the Chassis, on page 38 for the procedure.
Maintenance and Upgrades