Cisco 2900 Series Installation Manual page 108

Connecting Power
Cisco 3900 Series Router Wiring Procedure for DC Input
To connect the router to a DC power source, follow these steps:
Step 1 Remove power from the DC circuit. To ensure that power is removed from the DC circuit, locate the
circuit breaker for the DC circuit, switch the circuit breaker to the OFF position.
Follow proper Lockout /Tagout Procedures as defined by your company in accordance with local and
Warning
national laws (e.g. Title 29 CFR Part 1910.147).
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Warning
Statement 1003
Secure all power cabling when installing this unit to avoid disturbing field-wiring connections.
Tip
When stranded wiring is required, use approved wiring terminations, such as closed-loop or
Warning
spade-type with upturned lugs. These terminations should be the appropriate size for the wires and
should clamp both the insulation and conductor. Statement 1002
Strip the wires to the appropriate length for the terminals. The length is 3/16 to 1/4 inch (5 to 6 mm) for
Step 2
Panduit No. LCAS8-10F-L terminals.
Crimp the terminals onto the DC power input and safety ground wires.
Step 3
Remove the plastic covers from the terminal block. Save the covers for reinstallation after you finish
Step 4
wiring.
Connect the wires to the terminal block, starting with the safety ground wire. Connect each wire to the
Step 5
appropriate terminal as shown in
The illustration shows the DC power supply terminal block. Wire the DC power supply as illustrated.
Warning
The proper wiring sequence is ground to ground, positive to positive, and negative to negative. The
ground wire should always be connected first and disconnected last. Statement 239
An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure
Warning
that no exposed portion of the DC-input power source wire extends from the terminal block plug.
Statement 122
Do not overtorque the terminal block screws. The recommended torque is 18.0 – 20.0 in-lb (2.03 – 2.26
Caution
N-m).
Cisco 2900 and 3900 Series Hardware Installation
3-26
Figure 3-25.
Chapter 3 Installing and Connecting the Router