GFK-0356Q
Appendix B IC690ACC900 Converter
B-5
B
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
Pin
Signal Name
Function
I/O
1
Cable Shield
2
DCD(A)
Differential Data Carrier Detect
Out
3
DCD(B)
Differential Data Carrier Detect
Out
4
ATCH/
Attach (used with HHP)
n/a
5
+5 VDC
Logic Power
In
6
RTS(A)
Differential Request To Send
Out
7
SG
Signal Ground, 0V
In
8
CTS(B’)
Differential Clear To Send
In
9
RT
Resistor Terminator
n/a
10
RD(A’)
Differential Receive Data
In
11
RD(B’)
Differential Receive Data
In
12
SD(A)
Differential Send Data
Out
13
SD(B)
Differential Send Data
Out
14
RTS(B)
Differential Request To Send
Out
15
CTS(A’)
Differential Clear To Send
In