Fan Tray - Cisco CRS-1 System Description

Fan Tray

The fan tray contains the following components:
Four fans—Each fan uses –36 to –72 VDC as its input power. The fans operate in the range of 3500
•
to 7500 RPM.
Note
• Fan controller—The board terminates signals to and from the fans, filters common-mode noise, and
contains tracking and indicator parts. The fan controller is not user accessible or field replaceable.
Status LED—The LED indicates the following:
•
–
–
–
The fan tray has the following physical characteristics:
Height—13.7 in. (34.7 cm)
•
Width—17.4 in. (44.1 cm)
•
Depth—3.7 in. (9.3 cm)—Includes rear connector and front handles
•
Weight—16 lb (7.2 kg)
•
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System Description
3-6
The fan speed range limits listed in this document are nominal. These numbers have a tolerance
of plus or minus 10 percent.
Green—The fan tray is operating normally.
Yellow—The fan tray or a fan has experienced a failure and should be replaced.
Off—The RP has not booted, the LED is faulty, or no power is being received.
Chapter 3 Chassis Cooling System
OL-10805-10