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64 8900NET Instruction Manual
Functional Description
Fan Speed Control and Monitor
The fan speed circuit controls the speed of the fans based upon the ambient
temperature in the area in which the frame is located. If the temperature is
30° C or lower, the fans are set to minimum speed. For temperatures above
30° C, the fan speed is set higher as the temperature increases. The fan
speed is set to maximum for ambient temperatures above 40° C. The
control circuit can be overridden so the fans are set to maximum speed,
using a jumper on the board.
On-board Regulator
+12 V supply voltage is regulated on-board to provide +5 V and +3.3 V to
the module.