Locate the terminal block plug.
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.
Identify the positive and negative feed positions for the terminal block connection. The recommended wiring sequence is (see the figure below):
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.
Use a ratcheting torque screwdriver to torque the terminal block
plug captive screw (above the installed wire lead) from 4.425 in.-lb (.5 N-m)
to 5.310 in-lb (.6 N-m).
Repeat Step 4 through Step 5 for the remaining DC input power
source wire and the ground wire.
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.
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.
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.
This completes the procedure for connecting the DC power supply in
the Cisco NCS 4216.
If you are installing a redundant DC power supply, repeat these steps
for the second power source.