This Harmony RSL plug-in socket with LED indicator has a rated voltage of 230V AC/DC." "It has a large choice of number of contacts for high rated current use with space-saving design which allows for a flexible and easy installation on DIN rail." "It helps to reduce the size of enclosures and increases machine reliability, you can mount nearly everywhere." "It is compatible with plug in control relay." "Workability for hard-wired logic automated systems to complement the functions of industrial programmable logic controllers (PLCs).