Kontron COMe Ref. Carrier T2 - Manual (Page 56)

COM Express™ miniBaseboard Type 2 / Connectors and Features
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5.18.3 FAN
On ETXexpress® miniBaseboard two 3-pin Fan connectors for FAN1 (J49) and FAN2 (J50) are available for system
cooling controlled by the LPC-I/O.
The COM Express™ miniBaseboard Type 2 provides one 4-pin PWM FAN connector directly controlled by the LPC-I/O
PWM output 1.
Fan pin-out
Pin J49 / J50 on ETXexpress® miniBaseboard J50 on COM Express™ miniBaseboard Type 2
1 Sense GND
2 +12V (default)
8.5V - 12V in Single Supply mode
Optional: +5V in ATX and Single Supply mode +12V (default)
Not supported in Single Supply mode
Optional: +5V in ATX and Single Supply mode
3 GND Sense
4 - Control (PWM)
Note: In default ATX mode all Fan connectors are configured to 12V. Optionally all connectors can be modified to
5V output in ATX and Single Supply mode. See single supply assembly instructions how to fix fan voltage
outputs to 5V.