Technical data

Dual 9-, 12-, and 20-Slot Power Supply
7-13
7
Removal and Replacement
The flexibility of the XR system allows a variety of power supply
configurations. Use the following list to determine the best
installation method for your system’s configuration.
❏ To replace the power supply in a dual 9-slot system or in a
system configured with a single power supply, follow the
instructions in Dual 9-Slot/Single Power Supply Replacement on
page 7-13.
❏ To replace a power supply in a 12- or 20-slot system
configured with dual power supplies, follow the instructions
in 12- and 20-Slot Hot Swap Replacement on page 7-14.
❏ To add a power supply to a 12- or 20-slot system configured
with a single power supply, follow the instructions in 12- and
20-Slot Hot Add on page 7-16.
Dual 9-Slot/Single Power Supply Replacement
1. Shut down the operating system and switch the power
supply to STANDBY.
Note On the dual 9-slot system, be sure to shut down the side
being replaced.
2. Disconnect the input power source from the power supply
being changed:
– If the power supply is an AC unit, unplug the power cord
from the AC outlet and from the back of the XR chassis.
– If the power supply is a DC unit, turn off the -48Vdc power
source and unscrew the clamping contacts to release the
DC leads from the terminal block on the power supply.