rH-R3S3 is a combination of three relays and three contact inputs. The module sends information about the opening and closing of contacts to the system and controls relays that can switch on any electrical circuits. Communication with the server takes place via radio. The module has three physical inputs for connecting three monostable potential-free contacts, and three relay inputs. The load of the relay contacts can be resistive, inductive or capacitive, both in DC and AC circuits. Pressing the button on the housing for less than 1 s will switch on or off all relays simultaneously.