Use of KNX bus coupler 3 with external sensorFeatures: The bus coupler 3 establishes the connection between the KNX system and a KNX application module. The combination of the bus coupler 3 and an application module results in a functional unit. In the ETS project, this unit is planned in the form of the application program of the application module. A remote temperature sensor can also be connected to the bus coupler 3 with external sensor. A room temperature controller can therefore record the temperature at an additional measuring point.Notes: The remote sensor only works in combination with a push button sensor 3 Plus.