Excel Smart I/O Compact modules feature three configurable digital inputs, analog inputs, and relay outputs suitable for a wide range of intelligent, distributed applications. Furthermore, it provides a very flexibly configurable switching logic function which empowers the device to perform some fast control functions (e.g. limit checks, On/Off control, light control applications, etc.) executed locally and therefore independent of any other system components. The switching logic can process a bunch of conditions based on physical input, and output signals, network inputs as well as errors conditions due to sensor break, short circuit, or communication failure.