
18
Rockwell Automation Publication 1769-UM012B-EN-P - January 2014
Chapter 1
Compact I/O ASCII Module
Connect the D-sub Connector
Pins
All the pins are always active.
Figure 1 - RS-232 Wiring Diagram - Module to DTE Device (hardware handshaking disabled)
(1) Connect to the shield of the cable.
IMPORTANT
Pins unused for a particular physical network must not be connected via the
serial cable to any other device. In particular, do not use cables 1747-CP3 and
1756-CP3.
Pin
RS-232
RS-422
RS-485
1
Do Not Connect
Transmit Data -
Transmit/Receive Data -
2
Receive Data
Do Not Connect
Do Not Connect
3
Transmit Data
Do Not Connect
Do Not Connect
4
Do Not Connect
Receive Data -
Do Not Connect
5
Common
Common
Common
6
Do Not Connect
Receive Data +
Do Not Connect
7
Request To Send
Request To Send
Request To Send
8
Clear To Send
Clear To Send
Clear To Send
9
Do Not Connect
Transmit Data +
Transmit/Receive Data +
NC
1
RXD
2
TXD
3
NC
4
COM
5
NC
6
RTS
7
CTS
8
NC
9
DCD
TXD
RSD
DSR
COM
DTR
CTS
RTS
GND
8
2
3
6
7
20
5
4
1
1
3
2
6
5
4
8
7
(1)
ASCII DTE
DTE
9-pin
25-pin
Summary of Contents for Allen-Bradley 1769-ASCII
Page 1: ...Compact I O ASCII Module Catalog Numbers 1769 ASCII User Manual ...
Page 4: ...4 Rockwell Automation Publication 1769 UM012B EN P January 2014 Summary of Changes Notes ...
Page 101: ...Rockwell Automation Publication 1769 UM012B EN P January 2014 101 Error Codes Appendix C ...
Page 117: ......