76 Appendix WAGO-I/O-SYSTEM 750750-652 Serial Interface RS-232 / RS-485Manual1.2.0Figure 29: Example of the 750-375 and 750-377 fieldbus coupler configuration dialog11.1.2.1 All PROFIBUS DP and PROFINET IO Fieldbus CouplersThe following assignment applies to the parameters of the I/O module when usingPROFIBUS-DP and PROFINET-IO fieldbus couplers.Component damage due to incorrect voltage level!Incorrectly selected voltage levels can destroy the device!Note when switching between operating modes that RS-232 and RS-485 usedifferent voltage levels.Switch off connected devices before changing operating modes!Make sure that devices you connect support the voltage level of the currentoperating mode!Table 49: Specific module / channel parameters for 75x-652GSD File WAGO-I/O-CHECKDescription Value Selection box ValueEnhancedoperating modeaccording to the followingsettingsOperating Mode (no equivalent)DMX half-duplex/250k Operating Mode DMX half-duplex/250kMode RS-232 Operating Mode RS-232RS-485 half-duplex*) Operating Mode RS-485 half-duplex*)RS-422 full-duplex Operating Mode RS-422 full-duplexData exchange RS-422 Operating Mode Data exchange RS-422
