The modules of the S series were specially developed for industrial automation processes, which can be used to easily and cost-effectively expand the inputs and outputs. Thanks to its built-in LEDs, they continuously provide feedback on the operating conditions. The modules are capable of communicating on one of the most popular communication protocols, Modbus ASCII/RTU. The IP version SfAR-S-ETH module can also be used as a transparent MODBUS TCP/MODBUS RTU or ASCII gateway.