Chapter1 Product Overview
Cisco 7600 Internet Router Components
1-12
Cisco7609 Internet Router Installation Guide
OL-5079-04
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. 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 Tab le 1-2.
For more information about the environmental monitoring feature, refer to the
Cisco 7600 Series Internet Router Software Configuration Guide.
Table1-2 Power Supply Front Panel LEDs
LED Description
INPUT OK AC-input power supplies:
•Green when the input voltage is OK (85 VAC or
greater)
•Off when the input voltage falls below 70VAC 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 –33VDC or if
the power supply shuts down
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