Rockwell Automation 1747-KE,D17476.12 DH-485/RS-232C Interface Module - Manual (Page 48)

Publication 1747-UM005B-EN-P - March 2006
4-10 Installation and System Configuration
RS-423/232 DTE to DCE (No Handshake to DCE)
RS-423/232 DTE to DTE (Soft or No Handshake to DTE
RS-422
NC
RXD
TXD
DTR
COM
DSR
RTS
CTS
NC
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
8
3
2
20
7
6
4
5
22
CD
COM
RI
RXD
TXD
DTR
DSR
RTS
CTS
(1)
(1)
(1) Connect DSR to DTR and CTS to RTS when using devices that cannot disable their hardware handshaking.
Peripheral Interface Module
9-pin 25-pin
DTE DCE
NC
RXD
TXD
DTR
COM
DSR
RTS
CTS
NC
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
8
3
2
20
7
6
4
5
22
CD
COM
RI
RXD
TXD
DTR
DSR
RTS
CTS
(1)
(1)
(1)
Connect DSR to DTR and CD, and CTS to RTS when using devices that cannot disable their handshaking.
Peripheral Interface Module
9-pin 25-pin
DTE DTE
TXD-
RXD-
COM
RXD+
TXD+
1
2
3
4
5
6
7
8
9
RXD-
TXD-
COM
TXD+
RXD+
Peripheral Interface Module
DTE