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Chapter 1: Overview
42
AT-SBx31FAN Tray
The AT-SBx31FAN Tray consists of four fans with speed control and
status circuitry. It is a field replaceable assembly that is factory installed
and shipped with the AT-SBx3112 Chassis.
The fan tray is initialized by the Switchblade x3112 Management Software
running on the AT-SBx31CFC Fabric Control Card. The fan speed is
controlled automatically and is adjusted proportional to the internal
operating temperature of the switch. When the ambient temperature
coming into the fan tray is approximately 20 C, the speed of the fans are
their lowest. The fan speed increases to provide additional cooling as the
ambient temperature rises, which allows proper operation for the line
cards within the chassis.
The AT-SBx31FAN Tray features the following:
Cooling across all twelve chassis line card slots
Quad-fan design for better reliability
Software controlled, temperature speed control for noise control
Hot-swappable design
Figure 19 AT-SBx31FAN Tray
Note
The CLI mnemonic for the AT-SBx31FAN Tray in the Switchblade
x3112 Management Software is “FM4”.
1808
SBx31FAN
POWER