Activating The Dc Power Supply; Removing And Replacing The Dc Power Supply - Cisco ASR 903 Installation Manual

Installing the Power Supply
Follow the steps to remove the power supply unit if installed in the chassis. See
Step 1
the DC Power Supply, page
Locate the T-shaped terminal block plug on the DC power supply unit. See
Step 2
Use a wire-stripping tool to strip the ends of each of the two wires coming from the DC-input power
Step 3
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 after installation.
Prepare the cables by attaching the lugs to the cables.
Step 4
Step 5 Identify the ground, positive, and negative feed positions for the terminal block connection. The
recommended wiring sequence is
•
•
•
Step 6 Insert the lugged end of the cables to the connector and secure the cables using the captive screws.
Note
Ensure that the terminal block plug is fully seated in the terminal block header on the DC power supply
Step 7
panel. See
chassis.

Activating the DC Power Supply

Perform the following procedure to activate the DC power supply:
Remove the tape from the circuit-breaker switch handle, and restore power by moving the circuit-breaker
Step 1
switch handle to the On (|) position.
Verify power supply operation by checking if the power supply front panel LEDs are in the following
Step 2
states:
•
•
If the LEDs indicate a power problem, see
If you are installing a redundant DC power supply, ensure that each power supply is connected to a
separate power source in order to prevent power loss in the event of a power failure.
If you are installing a redundant DC power supply, repeat these steps for the second power source.

Removing and Replacing the DC Power Supply

This section provides information about removing and replacing the DC power supply in the
Cisco ASR 903 Router.
Cisco ASR 903 Router Hardware Installation Guide
3-26
3-26.
Negative (-) lead wire (top)
Ground lead wire (left)
Positive (+) lead wire (right)
The recommended torque for securing the captive screws is 0.7 N-m.
Installing the DC Power Supply, page 3-21
INPUT OK LED is green
OUTPUT FAIL LED is green
Chapter 3
for installing the power supply unit into the
Chapter 5, "Troubleshooting."
Installing the Cisco ASR 903 Router
Removing and Replacing
Figure 1-3.
OL-25178-03