AAEON AEC-6876 - Manual (Page 20)

E m b e d d e d C o n t r o l l e r A E C - 6 8 7 6
Chapter 2 Hardware Installation 2 - 4
2.2 RS-232 Box Header (COM1)
4B
Pin
25B
Signal Pin
5B
Signal
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI
2.3 RS-232/422/485 Pin Header (COM2)
RS-232 Mode
4B
Pin
25B
Signal Pin
5B
Signal
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 RI
RS-422 Mode
Pin Signal Pin Signal
1 TXD- 2 RXD+
3 TXD+ 4 RXD-
5 Ground 6 NC
7 NC 8 NC
9 NC