Quatech Connector Pinout: DB-9M connector:
RS-422/485 for SSCF-200/300

Pin

Name

Function

1

RxD-

Receive Data -

2

RxD+

Receive Data +

3

TxD-

Transmit Data -

4

TxD+

Transmit Data +

5

GND

GROUND

6

CTS-

Clear To Send -

7

RTS-

Request To Send -

8

CTS+

Clear To Send +

9

RTS+

Request To Send +

Shell

no connect

none