Avalue ECM-KA - Manual (Page 26)

ECM-KA User’s Manual
26 ECM-KA User’s Manual
2.4.9 System fan connector (SYS_FAN1)
Signal PIN
GND 1
+12V 2
EC_TACH1 3
FAN_PWM1 4
2.4.10 COM 1 RS-422-485 mode (J422/1)
Signal PIN PIN Signal
485TX.RX-/422TX- 2 1 422RX+
485TX.RX+/422TX+ 4 3 422RX -
5V 6 5 GND
Note:
J422/485 is available after modify the mode of COM1
in BIOS setting