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Installing the Cisco ASR 907 Router
Installing Terminal Block on the DC PSU (A900-PWR1200-D)
Perform the following procedure to install the terminal block.
Step 1
Locate the terminal block plug.
Step 2
Use a wire-stripping tool to strip the ends of each of the two wires coming from the DC-input power source to 0.27 inch
(6.6 mm) ± 0.02 inch (0.5 mm) and the wire for grounding. Do not strip more than 0.29 inch (7.4 mm) of insulation from
the wire. Stripping more than the recommended amount of wire can leave behind exposed wire from the terminal block
plug after installation.
Step 3
Identify the ground, positive, and negative feed positions for the terminal block connection. The recommended wiring
sequence is (see the figure below):
a) Ground lead wire (left)
b) Negative (-) lead wire (top)
c) Positive (+) lead wire (right)
Figure 33: DC Power Supply with Lead Wires
1
2
Step 4
Insert the exposed wire of one of the three DC-input power source wires into the terminal block plug. Make sure that
you cannot see any wire lead. Only wire with insulation should extend from the terminal block.
Do not overtorque the plug captive screws of the terminal block. The recommended maximum torque is from
Caution
4.425 in.-lb (.5 N-m) to 5.310 in-lb (.6 N-m).
Ground lead wire
Negative (–) lead wire
Installing the DC Power Supply
3
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Cisco ASR 907 Router Hardware Installation Guide
Positive (+) lead wire
79
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