Communicated on LOOP 2 bus. Connection to bus via bus adapter; extremely slim I/O modules in plastic housing to IP 67. Attaching couplers in a row enables straightforward handling of even small components. M12 connectors for bus connection; M8 for S/A connection; 3-way adapter and Y modules for straightforward bus branching; emergency-stop circuit integrated into bus line; pushbutton console for 4 DI, 4 DO (start/stop/step function for easy machine operation).