Installing A Dc Power Shelf; Dc Power Supplies - Cisco Carrier Routing System CRS-1 Installation Manual

Installing a DC Power Shelf

Installing a DC Power Shelf

This section describes how to install a DC power shelf in the Cisco CRS 4-slot line card chassis.
The DC power shelf encloses four power supplies and the power distribution connections and wiring.
The DC power input shelf is installed in the front of the chassis; the power input module (PIM) is
installed in the rear of the chassis.
We recommend that you have two separate, redundant –48 VDC power battery sources to provide power
to the Cisco CRS 4-slot line card chassis. Connect the two input pair 60-A DC inputs on the left to one
–48 VDC power source, and the input pair 60-A DC inputs on the right to the other –48 VDC power
source.
Sequence of Tasks
The sequence of tasks required to install the DC power shelf is:
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Prerequisites
Power down the Cisco CRS 4-slot line card chassis.
Tip We recommend that you do this procedure with the line card chassis mounted in a rack with sufficient
space for bottom and side access to the screws.
Required Tools and Equipment
You need the following tools and parts to perform this task:
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Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
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Remove the rear power access panels.
Install the DC power input module (PIM).
Install the DC power input shelf.
Mate and secure the power input module to the DC power input shelf.
Connect the grounding cable and the power input cables.
Install the DC power supplies.
ESD-preventive wrist strap
Medium flat-blade screwdriver
Number 1 Phillips screwdriver
Number 2 Phillips screwdriver
5-mm Allen wrench
10-mm hex socket wrench
DC power input shelf (Cisco product number: CRS-4-DC-INPUT)
DC power input module (PIM) (Cisco product number: CRS-4-DC-PIM)
DC power supplies (Cisco product number: CRS-4-DC-SUPPLY)
Chapter 2 Installing and Removing Power Components
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