Fan Tray Assemblies - Cisco ASR 5000 series Product Overview

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▀ Fan Tray Assemblies

Fan Tray Assemblies

There are two fan tray assemblies within the chassis. A lower fan tray provides air intake and an upper fan tray exhausts

warmed air from the chassis. Each fan tray is connected to both PFUs to ensure power feed redundancy. Both fan tray

assemblies are variable speed units that are automatically adjusted based on temperature or failover situations.

Thermal sensors monitor temperatures within the chassis. In the event of a fan failure or other temperature-related

condition, the Switch Management Card (SMC) notifies all operable fans in the system to switch to high speed and

generates an alarm.

Lower Fan Tray

The lower fan tray assembly contains multiple fans and pulls air into the chassis from the lower front and sides of the

chassis. The air is then pushed upward across the various cards and midplane within the chassis to support vertical

convection cooling.

▄ Cisco ASR 5000 Series Product Overview

Lower Fan Tray Assembly

ASR 5000 Hardware Platform Overview