RS-232 DB-25 Male Connector Pin-outs

RS-232 Signal Pin-outs of DB-25 Male

 

Pin 1  
Pin 2 TxD
Pin 3 RxD
Pin 4 RTS
Pin 5 CTS
Pin 6 DSR
Pin 7 GND
Pin 8 DCD
Pin 9  
Pin 10  
Pin 11  
Pin 12  
Pin 13  
Pin 14  
Pin 15  
Pin 16  
Pin 17  
Pin 18  
Pin 19  
Pin 20 DTR
Pin 21  
Pin 22 RI
Pin 23  

Pin 24

 

Pin 25