This Zelio RPM power plug-in relay has a coil control voltage of 24V DC and has 4 changeover contacts 4PDT (quadruple pole double throw) with a rating of 15A. It has large choice of number of contacts for high rated current use. It helps to reduce the size of enclosures and increases machine reliability: you can mount nearly everywhere. Plug in type enables easy installation and maintenance. Workablity for hard-wired logic automated systems to complement the functions of industrial progammable logic controllers (PLCs).