ELO E222ZKE001
5
3.2 RS485/RS422 connection
A DB9M (D-SUB 9 pin Male) connector is wired as shown on Pic. 1.
The brief description of the signal names is given in Tab. 1.
Signal
Abbrev. DB9M
Direction
Mode
Transmitted Data +
Tx+
2
OUT
Transmitted Data -
Tx-
7
OUT
Received Data +
RxTx+
3
IN
Received Data -
RxTx-
8
IN
RS422
Data +
RxTx+
3
OUT/IN
Data -
RxTx-
8
OUT/IN
RS485
Ground
GND
5
-
Both
Tab. 1: DB9M Pin description
Tx+
Rx+
/
RxTx+
GND
/
GND
RS485/RS422 connector - front view
Pic. 1
Tx-
Rx-
/
RxTx-