Rockwell Automation 1734-485ASC POINT I/O ASCII User Manual - Manual (Page 17)

Publication 1734-UM009B-EN-P - July 2003
Installing the ASCII Module 1-7
Module Terminations
Terminal RS-232 RS-485 RS-422
0 Tx 1 S+ 1 Tx+ 1
1 Rx 2 NC Rx+ 1
2 NC S- 2 Tx- 2
3 NC NC Rx- 2
4 NC NC NC
5 NC NC NC
6 NC CG CG
7 SG SG SC
1 S+ and Tx+ are transmit from the module
2 S- and Rx- are receive into the module
0 1
2 3
4 5
6 7
Tx
NC
NC
NC
Rx
NC
NC
SG
43124
Tx, S+ = Transmit Rx, S- = Receive
NC = No Connection SG = Signal Ground
CG = Chassis Ground
0 1
2 3
4 5
6 7
S+
S-
NC
CG
NC
NC
NC
SG
43488
0 1
2 3
4 5
6 7
Tx+
Tx-
NC
CG
Rx+
Rx-
NC
SG
43489
RS-422 RS-485 RS-232