Avalue EPI-QM57 - Manual (Page 28)

EPI-QM57
28 EPI-QM57 User’s Manual
2.4.11 Serial port 2 In RS-422/485 mode connector (J422/485)
Signal PIN PIN Signal
GND 6 5 +5V
RX+ 4 3 TX+
RX- 2 1 TX-
Note: J422/485 is available after
modifying the mode of COM2 in BIOS setting.
2.4.12 HD power connector (HD_PWR)
Signal PIN
GND 1
GND 2
+5V 3
+5V 4