Installing The Terminal Block - Cisco ASR 903 Installation Instructions Manual

Installing the Cisco ASR 903 Router as a Satellite Shelf
Step 5
Tighten the captive installation screws of the power supply. The recommended maximum torque is 5.5 lbf/sq in.
If you are installing a redundant DC power supply, repeat these steps for the second power source.

Installing the Terminal Block

SUMMARY STEPS
1. Locate the terminal block plug.
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.
3. Identify the ground, positive, and negative feed positions for the terminal block connection. The
recommended wiring sequence is:
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.
5. Use a ratcheting torque screwdriver to torque the terminal block plug captive screw (above the installed
wire lead) from 0.5 Nm (4.425 lbf/sq in) to 0.6 Nm (5.310 lbf/sq in) as shown in the figure.
6. Repeat Step 4 through Step 5 for the remaining DC input power source wire and the ground wire. This
figure shows the wiring completed for a terminal block plug.
7. Ensure that the terminal block plug is fully seated in the terminal block header on the DC power supply
panel. The plug has a locking feature. You should hear a snap or click when it is installed properly.
8. Use a tie wrap to secure the wires to the rack, so that the wires are not pulled from the terminal block plug
by casual contact. Make sure the tie wrap allows for some slack in the ground wire, as shown in the figure.
9. Use a tie wrap to secure the wires to the handle. Leave a service loop on the ground wire between the
handle and the connector such that it is the last to receive strain if the wires are pulled.
DETAILED STEPS
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:
a) Ground lead wire (right)
b) Negative (–) lead wire (left)
Cisco ASR 9000 Series Aggregation Services Router Satellite Systems Installation Guide
Installing the DC Power Supply
43