Rockwell Automation 1775-KA PLC-3 Communication Adapter Module User Manual - Manual (Page 28)

Installation
Chapter 2
2Ć16
Figure 2.9
Connection to Allen-Bradley 1775-KA Module
1
2
7
3
25
4
5
6
8
20
1
3
25
2
7
4
5
6
8
20
Connect the Shield at One End Only
RS–232–C
CHANNEL
Connector
of 1775–KA
Module
RS–232–C
CHANNEL
Connector
of 1771–KA
Conductors 2 and 7, 3 and 25 must be twisted pairs for distances longer
than 50 feet.
Set switch 3 (on the 1775–KA) OFF when the module is communicating
with another Allen-Bradley device.
10010–I
1
2
1
2
Module
If you want to connect the 1775–KA module to a modem or computer, use
the cabling pinout diagram (Figure 2.10) to construct your own cable.