System 3000 relay switching insert - Switching of lighting and single-phase motors. - Control of electric underfloor heating and thermal actuators in combination with a room temperature controller attachment. - Adaptive zero point switching. - Connection of extensions possible. - Automatic switching off of the load. Run-on times adjustable in five stages, cannot be retriggered. - Test operation for functional testing. - Operation with neutral conductor connection. Combination with RF operating attachment 1-way / 2-way for KNX: - Switching actuator channel 1-way or heating actuator 1-way - Sensor channel 1-way or 2-way. - Local control of the System 3000 insert possible. - Radio control of other devices for KNX as a sensor possible. - Temperature detection. - {b}Function selection of the insert for switching:{\b} Normally open/normally closed operation, staircase function with switch-off warning, scene function (16 scenes), lock function, time delays. Extension input as an additional control point for the System 3000 insert or for radio control of other devices for KNX as a sensor possible. - {b}Function selection of the insert for room temperature controller:{\b} Control of 230 V actuators, heating, cooling mode, heating and cooling mode, switching of heating or cooling mode via communication object or extension input. PWM and 2-point controller, absolute and relative setpoint specification, heat requirement control including cascading, valve protection function. Cyclic monitoring of the floor temperature, service mode for valve output, frost protection function (automatic or via communication object), calibration of the temperature sensor, boost function, summer and winter compensation, scene function (16 scenes). If the ambient temperature is higher than 35 °C, the connected load must be reduced.