The length of the cables depends on the location of your router in relation to the source of DC power. These
cables and the cable lugs used to attach the cables to the router chassis are not available from Cisco Systems.
They are available from any commercial cable vendor. For more information on site power and source DC
cable requirements, see
Power Connection Guidelines, on page 27
.
Note
To ensure that power remains off while you are performing this procedure, lock-out/tag-out the DC circuit
breaker switch in the off (0) position until you are ready to turn it on.
Caution
Follow these steps to connect the DC source power cables to a DC power tray:
Procedure
Step 1
Verify that the power tray switch is set to the STANDBY (0) position.
Step 2
Remove the clear plastic safety covers that fit over the DC power connection terminal studs.
Step 3
Connect the DC power cables in the following order (see
Figure 192: Typical AC Power Connections to an
AC Power Tray—Version 1 Power System, on page 192
for the version 1 power system,
Power Connections to a Power Tray for a Single DC Power Module—Version 2 Power System, on page 194
the version 2 power system, and
Figure 196: Typical Power Connections to a Power Tray for a Single DC
Power Module—Version 3 Power System, on page 195
for the version 3 power system.
a) Ground cables first.
b) Positive cables next.
c) Negative cable last.
Step 4
Repeat Step 3 for the other power modules installed in the tray.
To prevent injury and damage to the equipment, always attach the ground and source DC power
cable lugs to power tray terminals in the following order: (1) ground to ground, (2) positive (+) to
positive (+), (3) negative (–) to negative (–).
Caution
Do not overtighten the nuts that secure the DC power cables to the power tray terminals. Using the
7/16 hex socket and torque wrench the nuts should be tightened to a torque of 45 to 50 in-lb.
Caution
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
193
Installing Cards and Modules in the Chassis
Connecting Power to a DC-Powered Router