Dc Power Shelf - Cisco 12416 Installation And Configuration Manual

Physical and Functional Description of Router

DC Power Shelf

Caution
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
1-12
ILMI (yellow)—Indicates the PEM is operating in a current-limiting
•
condition.
For additional information about troubleshooting AC PEMs, see the
"Troubleshooting the AC-Input Power Subsystem" section on page
A DC-input power subsystem consists of a DC-input power shelf that houses 4
(2000 W or 2400 W) DC PEMs that provide full redundant power to the router.
Figure 1-8 shows a DC-input power shelf housing original series 2000 W power
supplies.
The Cisco 12416 and 12816 DC powered systems (part numbers GSR16/320-DC
and GSR16/320-DC) are equipped with 4 PEMs. 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)
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Two PEMs power the lower card cage (Zone 2)
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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.
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.
In the DC-input power configuration:
Modules A1 and B1 provide redundant power for system load zone 1 (the
•
upper blower module and the upper card cage).
Modules A2 and B2 provide redundant power for system load zone 2 (the
•
switch fabric card cage, the lower card cage, and the lower blower module).
Chapter 1 Product Overview
5-6.
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