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
-