GE Series 90-30 PLC - RS-232 Interface Pin Assignments

B-4 Series 90-30 PLC Installation and Hardware Manual – August 2002 GFK-0356Q
B
SERIES 90-30
PROGRAMMER
RS-485 RS-232
CONVERTER
Figure B-3. Typical Configuration with Series 90-30 PLC
RS-232 Interface Pin Assignments
Pin assignments and signal definitions for the RS-232 interface are listed below.
Table B-1. RS-232 Interface for Converter
Pin Signal Name Function I/O
1 Shield Cable shield -
2 SD Transmitted Data Out
3 RD Received Data In
4 RTS Request To Send Out
5 CTS Clear To Send In
6 - No connection -
7 SG Signal Ground -
8 DCD Data Carrier Detect In
9/19 - No connection -
20 DTR Data Terminal Ready Out
21 to 25 - No connection -