The SHR-7 L3 radio receiver for direct connection to the 230V mains is ideal for all surface-mounted installations in both private and industrial settings. It processes any radio signal from compatible transmitters in the SH-7 series and can switch one or more of the three potential-free relay contacts on and/or off. For each of the three relays, the transmitter code and button can be learned, allowing for combinations of button presses for operation. Two different transmission combinations can be stored for each relay contact. Therefore, the SHR-7 L3 receiver is also suitable for defining multiple user groups or protecting functions with button codes (e.g., door opening, alarm systems, etc.). In conjunction with transmitter coding via DIP switches, an unlimited number of transmitters can control one and/or multiple SHR-7 L3 receivers. The 3-channel receiver is designed for direct connection to the 230V / 50 Hz power supply. Using jumpers, the relay function for each output can be set individually. In toggle operation, the input and output behave identically. The output is active only while ON is being transmitted. In toggle mode, one command keeps the output permanently active. The same command will then deactivate the output permanently, and so on. To ensure trouble-free operation when used with inductive loads or in poor radio conditions, the relay's delay time can be extended to approximately 500 ms. This delay time prevents relay chatter. The SHR-7 L3 is delivered fully ready for connection with an IP54 housing and built-in wire antenna.