Serial Port Com3 Connectors(Cn32); Serial Port Com4 Connectors(Cn31) - Aaeon MB-662 User Manual

COM1 (CN32)
COM1 RS-232 (CN32)
Pin
1
2
3
4
5
COM4 (CN31)
COM4 RS-232/422/485 (CN31)
Pin Signal
1 DCDB
3 RXDB
5 TXDB
7 DTRB
9 GND
11 485TXD+
13 422RXD-
38 MB-662 User Manual
Signal
DCDA
RXDA
TXDA
DTRA
GND
Pin Signal
6 DSRA
7 RTSA
8 CTSA
9 DTRA
10 GND
Pin Signal
2 DSRB
4 RTSB
6 CTSB
8 IRIB
10 N/C
12 485TXD-
14 422RXD-