AAEON AEC-6940 - Manual (Page 24)

E m b e d d e d C o n t r o l l e r A E C - 6 9 4 0
Chapter 2 Hardware Installation 2 - 7
JP16 Function (COM2)
1-2 +12V
3-4 +5V
5-6 RI for COM2 (Default)
JP20 Function (COM3)
1-2 +12V
3-4 +5V
5-6 RI for COM3 (Default)
JP19 Function (COM4)
1-2 +12V
3-4 +5V
5-6 RI for COM4 (Default)
2.7 COM2 RS-232/422/485 Serial Port Connector
Pin Signal Pin Signal
1 DCD (422TXD-/485DATA-) 2 RXD (422RXD+)
3 TXD (422TXD+/485DATA+) 4 DTR (422RXD-)
5 GND 6 DSR
7 RTS 8 CTS
9 RI
1
3
4
2
5
6 9
7 8