The SHR-12 K4 radio receiver evaluates every radio signal from compatible transmitters in the SH-12 radio series and can turn one or more of the four potential-free relay contacts on and/or off. To implement a command from a transmitter, it must first be learned once. Learning a transmitter is done easily via a button. Depending on your preference, up to 60 transmitters can be learned with all buttons or individual transmitter buttons. The assignment of which function the transmitter buttons or the transmission command should perform is done through a selection field. With the help of DIP switches, all settings can be conveniently made during installation on-site. Both normally closed and normally open contacts are available for connection. LEDs provide information about the function and transmission behavior and indicate the status of the power supply of the transmitter and the radio receiver. The large number of functions and settings of the 4-channel multifunction receiver SHR-12 K4 allows for use in a wide variety of applications. Additionally, different relay functions can be set separately for each output.

In button operation, the input and output behave identically. The output is active only as long as an ON command is sent. In timer operation, the output remains active for the set time after an ON command and then automatically turns off. The adjustable time range of the timer is between 0.1 seconds and 60 minutes. OFF commands are still implemented. In switch operation, the output remains permanently active until an OFF command deactivates it. In toggle operation, one command permanently activates the output, and the same command permanently deactivates the output, and so on. The signal/function assignment also allows for the combination of various relay functions and mutual interlocks. Regardless of the chosen function, the relays can also be used wired.