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1.0 GENERAL
This Technical Description describes fan units used in the VCO/4K system. The fan unit draws
hot air from inside the VCO/4K and discharges it through the rear of the VCO/4K enclosure.
The fan unit has an alarm indicator (LED) that illuminates when any of the four cooling fans
has failed.
Power is provided to the fan unit from the power backplane. The fan unit is powered
automatically when one or both Power Supply Modules is powered on.
The fan unit consists of an aluminum tray that holds the following components:
•
Eight 12Vdc cooling fans
•
Three controller cards
•
One temperature-sensitive thermal link (fuse)
•
One LED indicator
2.0 SPECIFICATIONS
Part Number
Indicator LED
Fan Type
Power
Physical Dimensions
Technical Description
Contact your Cisco Systems sales representative
Fan Alarm
Brushless, 47 cfm, 12Vdc
6 -15vdc, 24 watts
Height: 3.5 inches
Width: 17.5 inches
Depth: 7.0 inches
Fan Unit
Fan Unit 1-1
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Troubleshooting
