Cisco Systems Cisco CRS-1 Manual De Usuario
2-18
Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis Installation Guide
OL-10971-07
Chapter 2 Installing and Removing Power Components
Removing a DC Power Shelf
Removing a DC Power Shelf
This section describes how to remove a DC power shelf from the Cisco CRS-1 4-slot line card chassis.
The DC power shelf is comprised of both the DC power input shelf and the DC power input module
(PIM). The DC power shelf encloses four power supplies and the power distribution connections and
wiring blocks.
The DC power shelf is comprised of both the DC power input shelf and the DC power input module
(PIM). The DC power shelf encloses four power supplies and the power distribution connections and
wiring blocks.
The DC power input shelf is in the front of the chassis; the power input module (PIM) is in the rear of
the chassis.
the chassis.
Sequence of Tasks
The sequence of tasks required to remove the DC power shelf is as follows:
1.
Bring down all power to the chassis.
2.
Disconnect the input power cables.
3.
Disconnect the grounding cable.
4.
Remove the air intake (inlet) grille.
5.
Remove all DC power supplies.
6.
Remove the DC power input shelf.
7.
Remove the DC power input module (PIM).
Prerequisites
Bring down the power to the Cisco CRS-1 4-slot line card chassis (as described in the steps below).
Required Tools and Equipment
You need the following tools and parts to perform this task:
•
ESD-preventive wrist strap
•
Medium flat-blade screwdriver
•
Number 1 Phillips screwdriver
•
Medium Phillips screwdriver
•
5 mm Allen wrench
•
10 mm hex socket wrench
Note
This procedure assumes that the Cisco CRS-1 4-slot line card chassis is already mounted in a rack with
sufficient room to access the sides and the bottom of the chassis.
sufficient room to access the sides and the bottom of the chassis.