Habey BIS-6650 - Manual (Page 16)

SATA:
Pin Signal Name
1 GND
2 TX+
3 TX-
4 GND
5 RX-
6 RX+
7 GND
PWROUT:
Pin Signal Name
1 +12V
2 GND
3 VCC
4 GND
5 VCC3
2.5.2 Serial Ports（COM）
Board provides 2x standard DB9 serial ports( Reserved two Pins :JCOM1, JCOM2)。
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