Step 5
Unplug the AC power cords or remove the DC fusing from the power source. Remove the AC or DC wiring from the
rear of the power shelf.
Step 6
Install the new power shelves.
Step 7
Install the power shelf wiring.
If you are converting from DC to AC power, and if you have AC Delta or AC Wye at your equipment, a
Cisco CRS PDU
will be required to convert 3-phase AC input power to single-phase AC input power for
the power shelf. For more information, see the
Cisco CRS 3-Phase AC Power Distribution Unit Installation
Guide
.
Note
Step 8
Install the alarm modules.
Step 9
Install the AC or DC PMs.
Step 10
Power the chassis back up.
What to do next
Use only one type of modular configuration power shelf—AC or DC—and its mating AC or DC PM in a
chassis at one time.
Note
Converting a Chassis from Fixed Configuration Power to
Modular Configuration Power
Do not attempt to convert from fixed configuration power to modular configuration power while the LCC is
powered up and running. Ensure that you have powered down the system and all power is disconnected from
the system.
Caution
This section lists the steps to be performed to convert the LCC from fixed configuration power to modular
configuration power..
Prerequisites
Before performing this task, you must completely power down the system and ensure that all power is
disconnected from the system. See
Power Up and Power Down a Chassis with Modular Configuration Power
for more information.
Steps
To convert a chassis from fixed to modular configuration power, perform the following steps
Cisco CRS Routers 16-Slot Line Card Chassis Installation Guide
96
Installing and Removing Power Components
Converting a Chassis from Fixed Configuration Power to Modular Configuration Power