The Siemens coupling contactor relay with 2 NO + 2 NC contact , 24 V DC voltage and size S00. It has screw type terminal suitable for switching auxiliary circuits SIRIUS 3RH2 for switching the control signals in the control circuit with option of direct connection to electronic controllers. The SIRIUS 3RH2 coupling contactor relays have standard-compliant terminal designations and a reliable and time-saving connection technology. Thanks to the multiplication of outputs, simultaneous switching of several auxiliary circuits is possible. The contacts are available with positively driven operation for safety applications as well as SUVA versions. The coupling contactor relays are climate-resistant, have a high contact reliability and are suitable for use worldwide thanks to the corresponding approvals.