Aaeon SBC-558 Manual page 49

CPU fan power connector (Fan1)
The SBC-558 onboard offer +12V power for the CPU cooling
fan. Plug in the fan cable onto the 3 pins fan power connector
onboard. The fan connector is marked CN1.
1
2
CPU fan power connector (Fan1)
Pin
1
2
40 SBC-558 User Manual
Signal
Vcc
GND