Rockwell Automation 1747-L40 SLC 500 Fixed Hardware Style - Manual (Page 126)

Appendix C
RS-232 Communication Interface
C–3
To connect Allen–Bradley devices with other devices over RS–232, you must
wire the cable connectors so that communication can occur through the
cabling, which provide the interface between devices.
Types of RS-232 Connectors
The figure below shows male connectors, and their pinout locations, for
Allen–Bradley modules.
9-point Connector
(Male)
15-point Connector
(Male)
25-point Connector
(Male)
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
15
14
13
12
11
10
9
5
4
3
2
1
9
8
7
6
Wiring Connectors for RS-232
Communication