2-30
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
OL-10971-10
Chapter 2 Installing and Removing Power Components
Removing a Power Supply
Caution
To prevent damage to the AC or DC power shelf-to-power supply connections, do not use
excessive force when seating a power supply to its power shelf.
What to Do Next
After performing this task, you may connect the power shelf to the power source (see the
“About
Installing and Removing the Power Components” section on page 2-1
, replace any front cosmetic
covers, and power up the chassis (see the
“AC Power Supply Cord Illustrations and Plug Types” section
on page 2-4
).
Removing a Power Supply
This section describes how to remove a power supply in the Cisco CRS 4-slot line card chassis. The
power supplies can be an AC or DC power supplies (however, mixed types are not permitted). The AC
power supply converts facility AC power into the DC power necessary to power the cards and modules
in the chassis. Each AC power supply has its own pair of cooling fans, which draws air through the power
supply.
For complete information on regulatory compliance and safety, see
Cisco CRS Carrier Routing System
Regulatory Compliance and Safety Information
.
See
Figure 2-24
for an illustration of a power supply.
Prerequisites
Before operating the power shelf ejectors and removing the power shelf, take the following precautions:
•
For an AC power shelf, ensure that the rear panel fasteners are disengaged.
•
For a DC power shelf, unlock the power input shelf by pulling the lever handles down.
•
Disconnect the input power cables.
•
Remove the air intake (inlet) grille.
Required Tools and Equipment
You need the following tools to perform this task:
•
ESD-preventive wrist strap
Steps
To remove a power supply, follow these steps:
Step 1
Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection
sockets on the front (PLIM) side of the chassis or a bare metal surface on the chassis.