rH-TSR1S2 is a combination of a three-state relay and two contact inputs. The module sends information about the opening and closing of contacts to the system and controls the relay that can switch bidirectional electrical receivers. Communication with the server takes place via radio. The module has two physical inputs for connecting two monostable potential-free contacts, and two relay inputs. The load of the relay contacts can be resistive, inductive or capacitive, both in DC and AC circuits.