Prerequisites
Power off the DC power modules in the tray you want to disconnect.
Before removal, make sure that the input power cables are not energized.
Note
Required Tools and Equipment
•
ESD-preventive wrist strap
•
6-inch, number-1 Phillips screwdriver
•
3/8-inch ratchet wrench with 7/16-pt. socket
•
Voltmeter
Steps
To disconnect DC input power cables, go to the rear of the chassis or the front if the DC rear to front converter
box is used and perform the following steps:
Procedure
Step 1
Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the two ESD jacks on the
rear of the chassis. You can also connect the ESD-preventive wrist strap leash to any bare metal surface on
the chassis.
Step 2
Using the voltmeter, verify that there is no voltage on the cables that are about to be removed.
Step 3
Use the screwdriver to remove the screw that secures the terminal block cover into the mounting standoff.
Step 4
Slide the terminal block cover downward.
Step 5
Remove the terminal block cover.
Step 6
Disconnect the DC power cables from their terminals in the following order and note the color of each cable:
a) Negative (PWR) cables first.
b) Positive (RTN) cables last.
Step 7
Replace the terminal block cover.
Removing a Power Module Slot Cover
This section describes how to remove a power module slot cover from a power module slot in an AC or DC
power tray.
Steps
To remove a power module slot cover from the front of a power tray, perform the following steps:
Hardware Installation Guide for Cisco NCS 4000 Series
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Removing and Replacing Chassis Components
Removing the Power Components
