Pinouts >  RS-232 and other serial ports and interfaces
9 pin D-SUB female connector layout
9 pin D-SUB female connector
Pin Signal Description
1   Shield
2 RTS+ Request To Send +
3 RTS- Request To Send -
4 TXD+ Transmit Data +
5 TXD- Transmit Data -
6 CTS+ Clear To Send +
7 CTS- Clear To Send -
8 RXD+ Received Data +
9 RXD- Received Data
used with PCA-6773 motherboard and some other hardware
Pinout status: +2 -7
According to 9 reports in our database (2 positive and 7 negative) the RS-422 (9 pin) pinout may be incorrect.

Is this pinout
NO DIY devices
RS-422 (9 pin) visual pinout:click to enlarge
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