GE 90-30 PLC Series Installation And Hardware Manual page 260

Conn. B
Conn. A
RS-232/422
Converter
Figure 10-14. Multidrop Arrangement for Series 90-70 TMR Redundant System
GFK-0356Q Chapter 10 Cables
Conn. B
PLC A
C
P
U
IC690CBL714A
Conn. C
Conn. C
PLC B
C
P
U
IC690CBL714A
Conn. A
10
Cables
PLC C
C
P
U
10-21