Electronic floor temperature controller for time-dependent control of temperatures in closed rooms. Suitable for floor, edge zone, bathroom, ceiling, tiled stove, marble and wall heating or temperature control systems up to 3000 W. Can be used as a master (pilot controller) to reduce the temperature of other controllers. Controllers of the FETR, FTR and RTBSB series are suitable for this purpose as slaves (satellite controllers). Simple operation with direct selection buttons. In the event of a sensor break or sensor short circuit, the heating is activated with a duty cycle of 30 % to prevent cooling or frost damage in the room. Temperatures below -20 °C are also evaluated as sensor breakage and the emergency run function is triggered. It can also be mounted on a flush-mounted box using an adapter plate.