Motorola P880 User Manual

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Cajun P880 Routing Switch Installation Guide

The Cajun P880 contains two fan assemblies:

■

One large chassis fan tray containing ten fans to cool the logic 
section of the system.

■

One smaller rear fan tray containing four fans, mounted on 
the lower rear panel to cool the switch elements.

Both fan assemblies are hot-swappable and contain fan management 
circuitry to:

■

Provides power to the fans

■

Supplies reduced voltage to the fans, for reduced speed 
operation

■

Provides the Fan OK and present status signal to the CPU

■

Forces full fan speed operation, in the event of a fan failure

■

Accepts a control signal from the CPU, to force full fan speed 
in the event of an over-temperature condition.