•
It provides side-to-side forced air cooling
•
It provides redundant fans
•
It is field replaceable
•
It contains status LEDs
•
It contains two alarm ports with two external alarm inputs
The fan tray modules supported on the router are:
•
A902-FAN-E ( Figure 1-6 )
For more information about air flow guidelines, see the
section . For instructions on how
to install the fan tray, see the
section. For a summary of the LEDs on the fan tray, see
the
section .
Fan Tray (A902-FAN-E)
The Cisco ASR 902 Router uses a modular fan tray that is separate from the power supply. The A902-FAN-E
is a fan tray containing eight (40 x 40 x 20 mm) fans and provides sufficient capacity to maintain operations
indefinitely in the event of an individual fan failure. It has a 8-mm fan dust filter that prevents dust from
entering the unit and avoids possible damage to the components. The fan tray is IEC60950-1 compliant.
Figure 6: Cisco ASR 902 Fan Tray with Dust Filter and Dummy Cover (A902-FAN-E)
Component
Label
Component
Label
Dummy cover
4
Label
1
Pull tab
5
Alarm
2
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
10
Overview
Fan Tray