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Kontron mITX-E38 User Manual

Page 27

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KTD-N0903-A

Page 25

Internal Connectors


mITX-E38 Users Guide

Fan for SOC and System (Fan SOC – J29, Fan Sys – J28)

7.4

The Fan SOC is used for the connection of the FAN included in active SOC cooler.

The Fan Sys can be used to power, control and monitor fan for chassis ventilation etc.





Signal

Description

PWM

PWM output signal for FAN speed control.

TACHO

Tacho input signal from the fan, for rotation speed supervision RPM (Rotation Per Minute). The
signal shall be generated by an open collector transistor or similar. Onboard is a pull-up
resistor 4K7 to +12V. The signal has to be pulsed and onboard circuit is prepared for two pulses
per rotation.

12V

+12V supply for fan. A maximum of 500mA can be supplied from this pin.

GND

Power Supply GND signal






Header

Pin

Signal

Description

Type


1

GND

Ground

PWR

2

12V

AI

3

TACHO

Tacho signal

I

4

PWM

PWM output

O-3.3