GE 90-30 PLC Series Installation And Hardware Manual page 362

RS-422/RS-485 Interface Pin Assignments
Pin assignments and signal definitions for the RS-422/RS-485 interface are listed below.
Table B-2. RS-422/RS-485 Interface for Converter
GFK-0356Q Appendix B IC690ACC900 Converter
Pin Signal Name
1 Cable Shield
2 DCD(A)
3 DCD(B)
4 ATCH/
5 +5 VDC
6 RTS(A)
7 SG
8 CTS(B')
9 RT
10 RD(A')
11 RD(B')
12 SD(A)
13 SD(B)
14 RTS(B)
15 CTS(A')
Function
Differential Data Carrier Detect
Differential Data Carrier Detect
Attach (used with HHP)
Logic Power
Differential Request To Send
Signal Ground, 0V
Differential Clear To Send
Resistor Terminator
Differential Receive Data
Differential Receive Data
Differential Send Data
Differential Send Data
Differential Request To Send
Differential Clear To Send
B
I/O
Out
Out
n/a
In
Out
In
In
n/a
In
In
Out
Out
Out
In
B-5