Removing An Ac Or Dc Power Tray - Cisco NCS 4000 Series Hardware Installation

Removing and Replacing Chassis Components

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
Caution 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).
In case of power tray replacement, first remove the rear power connections before extracting the power
Warning
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.
Required Tools and Equipment
• 6-inch, number-1 Phillips screwdriver
Steps
To remove an AC or DC power tray, perform the following steps:
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.
Removing an AC or DC Power Tray
Hardware Installation Guide for Cisco NCS 4000 Series
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