Hardware Setting & Mode Configuration

Inside the unit, there is one 1X3 (3 pin) header block which is set to select the pin 9 of DB-9 male connecter. You need to push down the upper case, and slide it open by following the direction of the arrow in the illustration below. You can set the jumper to provide the pin 9 of DB-9 male connecter for RI signal or DC 5V 150mA power.

 

RS-232 DB9 Male Connector Pin-outs

RS-232 Signal Pin-outs of DB-9 Male (short pin header 1 & 2)

 

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

 

 

RS-232 Signal Pin-outs of DB-9 Male (short pin header 2 & 3)

 

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 DC 5V