R1200 series of smart serial RS-485 remote I/O offers the benefit of simple wiring, as they only use two wires to communicate with the controller or other RS-485 devices. It uses the EIA RS-485 communication protocol and 3 kV DC I/O isolation between I/O channels, RS-485 port and power circuits and is ESD- and EFT-compliant CE/FCC, UL 508 certification.