Pem; Environmental Monitoring Of The Power Supply; Power Supply Leds - Cisco 7600-SIP-400 - SPA Interface Processor 400 Installation Manual

Cisco 7600 Series Router Components

Environmental Monitoring of the Power Supply

The environmental monitoring and reporting functions allow you to maintain normal system operation
by resolving adverse environmental conditions prior to loss of operation.
The power supplies monitor their own internal temperature and voltages, and in the event of excessive
internal temperature, the power supply will shut down to prevent damage. When the power supply
returns to a safe operating temperature, it will restart. In the event of an abnormal voltage on one or more
outputs of the power supplies, the OUTPUT FAIL LED will light. Substantial overvoltage conditions
can lead to a power supply shutdown.
For more information about the environmental monitoring feature, refer to the Cisco 7600 Series Router
Supervisor Engine and Route Switch Processor Guide.

Power Supply LEDs

The power supply front panel LEDs are described in
Table 1-2
LED
INPUT OK
FAN OK
OUTPUT FAIL
1. The 4000 W DC-input power supply has three INPUT OK LEDs.

PEM

For information on installing or replacing a PEM, see the
Note
on page
The Cisco 7603 router, Cisco 7603-S router, and Cisco 7606 router use PEMs to connect the site power
source to the power supply.
and Cisco 7606 routers.
The PWR-2700-AC power supply does not use PEMs.
Note
Cisco 7600 Series Router Installation Guide
1-32
Power Supply Front Panel LEDs
Description
AC-input power supplies:
Green when the input voltage is OK (85 VAC or
•
greater)
Off when the input voltage falls below 70 VAC or if the
•
power supply shuts down
DC-input power supplies
Green when the input voltage is OK (–40.5 VDC or
•
greater)
Off when the input voltage falls below –33 VDC or if
•
the power supply shuts down
Green when the power supply fan is operating properly
Red when there is a problem with one or more of the
DC-output voltages of the power supply
5-112.
Table 1-3
Table 1-2.
1
:
"Removing and Replacing the PEM" section
list the PEMs and corresponding power upplies for the Cisco 7603
Chapter 1 Product Overview
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