Removing an AC or DC Power Tray
This section describes how to remove a power tray from the Cisco NCS 4009 chassis.
Prerequisites
•
Power off the power shelf that houses the power tray you are about to remove.
•
Ensure the power tray you are about to remove is empty. It is not necessary to turn off the switch on the
power tray to remove individual power modules. Power modules support OIR, so they can be removed
and replaced with the power on and the system operating.
The I/O switch on each power shelf disables the output of the power modules in that shelf only. The inputs
to the power modules remain hot, as well as the system
’
s internal bus bar (due to the other power shelf).
Caution
In case of power tray replacement, first remove the rear power connections before extracting the power
tray. In DC, if the power connections are not removed, the connected power cables will prevent the power
tray from being extracted. The power lugs could also be shorted with the metal part of the chassis causing
physical damage to the equipment or personnel.
Warning
Required Tools and Equipment
•
6-inch, number-1 Phillips screwdriver
Steps
To remove an AC or DC power tray, perform the following steps:
Hardware Installation Guide for Cisco NCS 4000 Series
247
Removing and Replacing Chassis Components
Removing an AC or DC Power Tray
