The K-System provides a reliable signal transmission between a field device and the control system. Whether plans include a single isolating module or a large-scale system integration, application-oriented solutions characterize the entire K-System product range of intrinsic safety interface modules. The power rail is an insert in the standard 35-mm DIN rail. When mounting on the DIN rail, the units snap in place. The power rail supplies the modules with power and provides a path for the collective error message from individual isolators. It reduces wiring because it eliminates the need to daisy chain the wires.