Bridge/Router Installation Guide

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Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis Installation Guide

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Chapter 2 Installing and Removing Power Components

Installing an AC Power Shelf

This section describes how to install an AC power shelf in the Cisco CRS-1 4-slot line card chassis. The

power shelf encloses four power supplies and the power distribution connections and wiring. The AC

power shelf is installed in the front (PLIM) side of the chassis.

The AC-powered chassis contains a single AC power shelf containing four AC power supplies. Each AC

power supply converts input AC power to the -54 VDC used by the Cisco CRS-1 4-slot line card chassis.

The AC power shelf is configured for single-phase AC power supply wiring(two wires + ground), and is

safety-rated at 110 to 240V VAC nominal, 50 to 60 Hz (4x) 11A.

For additional power details, see Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis System

Description, or in this document, see

Appendix A, “Cisco CRS-1 4-Slot Line Card Chassis

System Specifications.”

For complete information on regulatory compliance and safety, see Cisco CRS-1 Carrier Routing System

Regulatory Compliance and Safety Information.

Figure 2-18 AC Power Shelf

Prerequisites

Remove the air intake grille from the bottom of the chassis.

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