GE 90-30 PLC Series Installation And Hardware Manual page 347

Series 90 PLC Serial Port
The Series 90 PLC serial port is compatible with RS-422. An RS-232 to RS-422 converter is
required to interface to systems that provide RS-232 compatible interfaces. The Series 90 PLC
RS-422 serial port provides the physical connection for SNP communication. This port is a 5-pin
D-type female connector located as follows:
Figure A- shows the serial port orientation and connector layout for the Series 90 PLC types.
(The orientation of the connector on the Series 90-20 CPU is rotated 90 degrees from the Series
90-30 connector with pin to the upper right.) Table A-2 shows the pin numbering and signal
assignment applicable to both PLCs.
Figure A-1. Series 90 PLC, RS-422 Serial Port Connector Configuration
GFK-0356Q Appendix A Serial Ports and Cables
Series 90-70 PLC and Series 90-20 - CPU Module
Series 90-30 PLC - Power Supply
SERIES 90-70 PLC
15
SERIES 90-30 PLC
PIN
1
8
PIN
9
1
8
NOTE
SERIES 90 PLC CONNECTORS
USE METRIC HARDWARE.
(SEE CONNECTOR SPECIFICATIONS)
Serial Ports and Cables
9
15
A
A-3