DB-37 Female Connector Pin-outs

RS-232 Signal Pin-outs of DB-37 Female

Pin 1 .nc. Pin 20 RI(3)
Pin 2 DCD(3) Pin 21 DTR(3)
Pin 3 GND Pin 22 DSR(3)
Pin 4 CTS(3) Pin 23 RTS(3)
Pin 5 RxD(3) Pin 24 TxD(3)
Pin 6 RI(4) Pin 25 DCD(4)
Pin 7 DTR(4) Pin 26 GND
Pin 8 DSR(4) Pin 27 CTS(4)
Pin 9 RTS(4) Pin 28 RxD(4)
Pin 10 TxD(4) Pin 29 RI(2)
Pin 11 DCD(2) Pin 30 DTR(2)
Pin 12 GND Pin 31 DSR(2)
Pin 13 CTS(2) Pin 32 RTS(2)
Pin 14 RxD(2) Pin 33 TxD(2)
Pin 15 RI(1) Pin 34 DCD(1)
Pin 16 DTR(1) Pin 35 GND
Pin 17 DSR(1) Pin 36 CTS(1)
Pin 18 RTS(1) Pin 37 RxD(1)
Pin 19 TxD(1)    

 

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