Model 8310
IM-289A
Aeroflex / Weinschel
18
5-4.2. RS-422/485 Operation:
The RS-422/RS-485 Serial mode is useful in applications requiring long cable lengths
(up to 5000 ft at 9600 baud), or in electrically noisy environments. All communication parameters available for the
RS232 port are also available under RS-422 operation (baud rate, handshaking, etc). Full Duplex operation is
supported. The RS-422 port utilizes a 9-pin connector. The pin-out for the connector is show below. For clarity, the
signal names and directions are relative to the 8310.
Pin Signal
Name Description Direction
1
RxD+
Receive
data
input
2
RxD-
Receive
data
input
3
TxD-
Transmit
data
output
4
TxD+
Transmit data
output
5
GND
Ground
---
6
CTS+
Clear To Send
input
7
RTS-
Request To Send
output
8
CTS-
Clear To Send
input
9
RTS+
Request To Send
output
1
2
3
4
5
9
8
7
6
RXD+
RXD-
TXD-
TXD+
GND
RTS+
CTS -
RTS -
CTS+
RS422
9-pin DB9 Pinout
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