WAGO-I/O-SYSTEM 750 Connect Devices 45750-652 Serial Interface RS-232 / RS-485ManualVersion 1.4.07.2.4 DMX Operating ModeIn the DMX operating mode, the wiring is based on the RS-485 operating mode.7.2.5 Data Exchange ModeFigure 16: Point-to-point Connection Between Two NodesIn this mode, the contacts of the I/O modules to connect are connected to eachother crosswise.In the Data Exchange operating mode (point-to-point connection), a twisted-paircable should be used at least for larger cable lengths. Two wire pairs and oneground wire are required. The ends of the cable should be terminated with aterminal resistor.Generally, a passive resistance is used by connecting the signal lines via one100 … 120 Ω resistor apiece to the ends of the of the cable (A-B).
