5
RS-232 PIN DEFINTION
1. DB 9 Male RS-232/422/485 PIN DEFINTION
2. RS-232 CABLE PIN DEFINTION
Connector 1
Connector 2
Function
2
3
Rx
Tx
3
2
Tx
Rx
5
5
Signal ground
Pin
RS-232
RS-422/ 4-wire RS-485
2-wire RS-485
1
DCD
TxD-(A)
--
2
RxD
TxD+(B)
--
3
TxD
RxD+(B)
Data+(B)
4
DTR
RxD-(A)
Data-(A)
5
GND
GND
GND
6
DSR
--
--
7
RTS
--
--
8
CTS
--
--
