46 Connect Devices WAGO-I/O-SYSTEM 750750-652 Serial Interface RS-232 / RS-485Manual1.2.07.2.5 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).Pos : 80 /D okumentation allgemei n/Glieder ungs elemente/---Seitenwechs el--- @ 3\mod_1221108045078_0.doc x @ 21810 @ @ 1
