Cisco ASR 902 Installation Manual page 25

Installing the Cisco ASR 902 Router
• Lugs fork-type or ring-type (Burndy, see Troubleshooting )—TP10-6 or TP10-8F (recommended)
Step 1 If the power supply unit is already installed in the chassis, follow the steps described in
Power Supply to remove the power supply unit.
Step 2
Locate the T-shaped terminal block plug on the DC power supply unit. See figure "DC PSU Module (A900-PWR550-D-E)
with T-Shaped Connector" in the
Step 3 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
after installation.
Step 4 Prepare the cables by attaching the lugs to the cables.
Step 5 Identify the ground, positive, and negative feed positions for the terminal block connection. The recommended wiring
sequence is:
1 Negative (-) lead wire (top)
2 Ground lead wire (left)
3 Positive (+) lead wire (right)
Step 6 Insert the lugged end of the cables to the connector and secure the cables using the captive screws.
Note The recommended torque for securing the captive screws is 0.7 N-m.
Step 7
Ensure that the terminal block plug is fully seated in the terminal block header on the DC power supply panel. See the
Installing a DC Power Supply
Activating a DC Power Supply
Perform the following procedure to activate a DC power supply:
Step 1 Remove the tape from the circuit-breaker switch handle, and restore power by moving the circuit-breaker switch handle
to the On (|) position.
Step 2 Verify power supply operation by checking if the power supply front panel LEDs are in the following states:
• INPUT OK LED is green
• OUTPUT FAIL LED is green
If the LEDs indicate a power problem, see Troubleshooting.
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.
DC Power Specifications
section for installing the power supply unit into the chassis.
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
section.
Installing a DC Power Supply
Removing and Replacing a DC
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