Installation manual

Model 8210A-2-5 IM-377

Aeroflex / Weinschel

5-4. RS-422/RS485 OPERATION: The RS422/RS485 Serial mode is useful in applications requiring long cable

lengths (up to5000 ft at 9600 baud), or in electrically noisy environments. All communication parameters available for

the RS232 port are available under RS422 operation (baud rate, handshaking, etc). Full Duplex operation is

supported. The RS422 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 the8210A-2-5. The signals are electrically compatible with either RS-422 or

RS485.

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

RXD+

RXD-

TXD-

TXD+

GND

RTS+

CTS -

RTS -

CTS+

RS422

9-pin DB9 Pinout