Cisco 7609-S Installation Manual page 30

Cisco 7600 Internet Router Components
Environmental Monitoring of the Power Supply
Cisco 7609 Internet Router Installation Guide
1-12
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. 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.
The power supply front panel LEDs are described in
For more information about the environmental monitoring feature, refer to the
Cisco 7600 Series Internet Router Software Configuration Guide.
Table 1-2 Power Supply Front Panel LEDs
LED Description
INPUT OK AC-input power supplies:
•
•
DC-input power supplies:
•
•
FAN OK Green when the power supply fan is operating properly
OUTPUT FAIL Red when there is a problem with one or more of the
DC-output voltages of the power supply
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
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
Chapter 1 Product Overview
Table 1-2.
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