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