Cisco Systems 7609 manual Environmental Monitoring of the Power Supply, Led

Chapter 1 Product Overview

Cisco 7600 Internet 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. 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 Table 1-2.

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:
	• 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
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

	Cisco 7609 Internet Router Installation Guide
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