RS232 Isolator and Surge Protector
5. Male DB9 Pin Assignments and Cable Wiring
DB9-Male Pin Assignment:
1 5
6 9
9 Pins Signal
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 NC
NC = No connection
DB9(Male, Isolator) to DB9(Female, RS232 Device) Wiring:
DB9M(DTE,Isolator)
DB9F(DCE, RS232 Device)
1 DCD
1 DCD
2 RXD
2 TXD
3 TXD
3 RXD
4 DTR
4 DTR
5 GND
5 GND
6 DSR
6 DSR
7 RTS
7 CTS
8 CTS
8 RTS
4
