System fan, Table 3-7, Optional system fan (fan1) – ADLINK Express-HRR User Manual
Page 36
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Chapter 3
Hardware
32
Reference Manual
Express-HRR
System Fan
lists the pin signals of the System Fan interface, which provides a 3-pin, single-row header with
0.049" (1.25mm) pitch.
Note: The shaded table cell denotes power or ground.
Table 3-7. Optional System Fan (FAN1)
Pin #
Signal
Description
1
HWM_PWM2
Modulation – This signal controls the fan speed
2
VCC
+5.0/12.0 volts DC +/- 5%
3
HWM_TACH2
Fan Tachometer – This signal monitors the fan speed
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