Cisco 3745 User Manual
Page 15
15
Step 3
Crimp the terminals onto the DC power input wires.
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 4
Remove the plastic cover from the terminal block. Save it for reinstallation after you finish wiring.
Step 5
Connect the DC power input wires to the terminal block, as shown in Figure 6.
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
Warning
An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no
exposed portion of the DC-input power source wire extends from the terminal block plug. Statement 122
Caution
Do not overtorque the terminal block screws. The recommended torque is 8.0 ± 0.5 in-lb (0.9 ± 0.05 N-m).
Figure 6
Terminal Block Connections for DC Input Power
Step 6
Install the plastic cover over the terminal block.
Warning
The safety cover is an integral part of the product. Do not operate the unit without the safety cover installed.
Operating the unit without the cover in place will invalidate the safety approvals and pose a risk of fire and
electrical hazards. Statement 117
Step 7
Secure the wires using cable ties.
Step 8
If your router has a second power supply installed, repeat Step 1 through Step 7 for the second power supply.
Step 9
Turn on power to the DC circuit.
Connecting Routers to the Cisco Redundant Power System
If your router uses the Cisco Redundant Power System (RPS), refer to the instructions about the power connections.To locate these documents, see the “Where to Go Next” section on page 24.
103041
0V (return)
Positive polarity input
Safety ground
0V (return)
Negative polarity input
Safety ground
Negative DC input
Positive DC input