Cisco Systems Cisco XR 12416 manual DC Power Shelf

Chapter 1 Product Overview

Physical and Functional Description of Router

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

ADC-input power subsystem consists of a DC-input power shelf that houses 4 DC PEMs that provide full redundant power to the router. Figure 1-7shows 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.

	Cisco XR 12416 Router Installation Guide
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