K-System isolated barriers offer an extensive range of intrinsic safety interface modules for many signals and applications â€“ from simple isolators to highly functional modules. Furthermore, the signal conditioners are the perfect choice for general-purpose. Both types of modules can be mounted on the same Power Rail. They are clearly differentiated by color as signal conditioners have grey front labels. K-System modules are available in a variety of housing widths so they easily fit into any cabinet or enclosure. Whether one chooses the 12.5 mm KC-modules or the 20mm and 40mm KF-modules, the electrical and mechanical characteristics of the K-System are maintained.