RS422 9pin connector

#Computer#Serial Interfaces
9 pin D-SUB MALE connector pin-out & layout

9 pin D-SUB MALE connector  at the DTE (Computer)

1 Shield
2RTS+Request To Send +
3RTS-Request To Send -
4TXD+Transmit Data +
5TXD-Transmit Data -
6CTS+Clear To Send +
7CTS-Clear To Send -
8RXD+Received Data +
9RXD-Received Data -
Note: Direction is DTE (Computer) relative DCE (Modem)

RS366 interface

RS422 interface