Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 439)

Section 8
Communication Interface
8-6
Figure 8.7
RS-232 Cable Wiring to an Allen-Bradley T50
Allen-Bradley
T50
9 Pin D-Shell
SH
SD
RD
RS
CS
GND
1
2
3
4
5
7
9/Series
15- Pin D-Shell
3
2
7
8
5
6
4
RS-422 is used for serial communication between the control and
peripherals. RS-422 is also known as complimentary serial I/O. It is
available only on port B which is located on the motherboard (for the
9/260 and 9/290 control) and on the processor board for the 9/230 control.
This signal is able to resist noise even over long distances. When you use
RS-422, the interface cable can be as long as 4000 cable feet (1220
meters). Use shielded, twisted-pair cables to resist noise.
8.4
RS-422 Interface