mITX-BW – User Guide, Rev. 1.6
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7.1.2.
DC Power-Jack Connector (J56)
Figure 15: Power Connector J56
Table 20: Pin Assignment J56
Pin Designation
Signal
Description
Type
Center
Vin
Power +12 V to +24 V (2.5 mm Center Pin)
PWR
Ring
GND
Ground (5.5 mm Ring hole)
PWR
The board can be supplied via the AC/DC adapter plugged into the power jack. Such adapters
have usually no connection to protective earth. Consequently, the potential of the
conductive parts on the board may drift. If a human touches such a part, this may lead to an
electric shock. The board must be grounded separately, if the unit is supplied via power jack.
7.2.
Fan Connectors (J47 & J48)
The FANSYS (J48) can be used to power, control and monitor a fan for chassis ventilation etc.
The FANCPU (J47) is used for the connection of the FAN for the CPU.
The 4-pin header is recommended to be used for driving 4-wire type Fan in order to implement FAN speed control.
3-wire Fan support is also possible, but no fan speed control is integrated.
Figure 16: Fan Connector J47, J48
Table 21: 4-pin Mode J47, J48
Pin
Signal
Description
Type
1
GND
Ground
PWR
2
12 V
Power +12 V
PWR
3
TACHO
Tacho signal
I
4
PWM
PWM output
O-3.3
Table 22: 3-pin Mode J47, J48
Pin
Signal
Description
Type
1
GND
Ground
PWR
2
12 V
Power +12 V
PWR
1
2
3
4
