RS-232 DB9 Male Connector Pin-outs

 

 

RS-232 Signal Pin-outs of DB-9 Male

 

Pin 1

DCD

Pin 2

RxD

Pin 3

TxD

Pin 4

DTR

Pin 5

GND

Pin 6

DSR

Pin 7

RTS

Pin 8

CTS

Pin 9

RI