Cisco 2811 - Voice Security Bundle Router Hardware Manual page 78

Power Connections
Wiring Procedure for DC Input
To connect a router to a DC power source, perform the following steps:
Remove power from the DC circuit. To ensure that power is removed from the DC circuit, locate the
Step 1
circuit breaker for the DC circuit, switch the circuit breaker to the OFF position, and tape the
circuit-breaker switch in the OFF position.
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
Warning When stranded wiring is required, use approved wiring terminations, such as closed-loop or
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
Step 2 Strip the wires to the appropriate length for the terminals. The strip length is 3/16 to 1/4 inch (5 to 6 mm)
for Amp/Tyco No. 32957 terminals.
Crimp the terminals to the power input and safety ground wires.
Step 3
Step 4 Remove the plastic covers from the terminal block. Save the covers for reinstallation after you finish
wiring.
Step 5 Connect the wires to the terminal block, starting with the safety ground wire. Connect each wire to the
appropriate terminal as shown in
(0.9 ± 0.05 N-m).
Warning The illustration shows the DC power supply terminal block. Wire the DC power supply as illustrated.
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 contact screws. Recommended torque is 8.0 ± 0.5 in-lb
Caution
(0.90 ± 0.05 N-m).
Cable Connection Procedures for Cisco 2800 Series Routers
4
Figure 1. Tighten the terminal screws to 8.0 ± 0.5 in-lb
OL-5787-02