“This Harmony RPM plug-in socket has a rated voltage of 250V AC with an output rating of 16A.” “This plug-in relay socket is compatible with interface plug-in relay RPM range.” “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 increase machine reliability, you can mount nearly everywhere.” “It is compatible with plug in control relay.” “It enables easy installation and connect to relay from its socket.” “Workability for hard-wired logic automated systems to complement the functions of industrial programmable logic controllers (PLCs).”