Cisco Systems XR 12416 Instalační manuál stáhnout pdf (Strana 10)

Chapter 1 Product Overview

Physical and Functional Description of Router

1-10

Cisco XR 12416 Router Installation Guide

OL-13833-01

The status LEDs on an AC PEM provide information about the current operational

status of the power supply:

• PWR OK (green)—Indicates that the power supply module is operating

normally.

• FAULT (yellow)—Indicates that a fault is detected within the PEM.

• TEMP (yellow)—Indicates the PEM is in an overtemperature condition and

shutdown has occurred.

• ILMI (yellow)—Indicates the PEM is operating in a current-limiting

condition.

For additional information about troubleshooting AC PEMs, see the

“Troubleshooting an AC Power Supply” section on page 4-5.

DC Power Shelf

A DC-input power subsystem consists of a DC-input power shelf that houses 4

DC PEMs that provide full redundant power to the router. Figure 1-7 shows a

DC-input power shelf.

The chassis is electrically divided between the PEMS. These sections are referred

to as power zones and are labeled accordingly:

• Two PEMs power the upper card cage (Zone 1)

• Two PEMs power the lower card cage (Zone 2)

Each zone provides power to one blower, one alarm card, line cards and route

processor cards.

Zone 2 also supplies power to all switch fabric cards. The result is that there is

less power available for line cards in Zone 2, limiting the number of high-powered

line cards that can be configured in the lower cage.

Caution To ensure that the chassis configuration complies with the required power

budgets, contact your sales representative to provide you with the required power

calculator. Failure to properly verify the configuration may result in an

unpredictable state if one of the power units fails.

Contact your local sales representative for assistance.

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Cisco Systems XR 12416 Instalační manuál Strana 10