thepanelshop1 Posted October 3, 2013 Report Share Posted October 3, 2013 I need to set up communication between a V130-33-R34 controller and a Zoom land-line modem. I will be using an RJ11 com port on the PLC, set to RS232. The modem, unfortunately, is an older-style, and has a D-SUB 25-pin com port. I will need to build a cable to connect between the two devices. I found a D-SUB 25 RS232 pin-out arrangement online. Data communications is new to me, so I have a pretty basic question: Do I simply need to match the 6 signals on the PLC RJ11 port to the corresponding pins on the modem's cable? For example, does pin # 1 on the PLC (DTR Signal) get connected with pin #20 on the D-SUB, which, according the pin-out I found online, is also DTR? Following this logic, the two 0V reference pins on the PLC would be connected to the two GND pins on the modem, TXD to TXD, etc. Is this correct? Quote Link to comment Share on other sites More sharing options...
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