RedLotus Posted September 22, 2011 Report Share Posted September 22, 2011 Hi, I am using a Jazz JZ-10-11-R10 PLC in my application. I intend to use the serial port to communicate modbus with a modem. The problem is that the modem has a DB9 Female on board and a serial cable (RS-232) DB 9 Male/Female was provided with it in the box. Can I use this configuration to build my cable? Modem side (D type 9-pin Male) PLC side RJ11 Controller Signals DSR(out) 6 <--> 1 PWR(in) RTS(in) 7 <--> 2 GND GND 5 <--> 3 RXD(in) RXD(out) 2 <--> 4 TXD(out) TXD(in) 3 <--> 5 GND GND 5 <--> 6 PWR(in) DCD(out) 1 <--> I would very much appreciate it if someone could answer my question. Thank you very much. Best Regards, JM Quote Link to comment Share on other sites More sharing options...
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