Function: The coupler connects two KNX data lines and ensures the electrical separation of these lines from one another. The definite functions of the device are defined by addressing and parameterization.
Line coupler: Connection of a line with a main line. Alternatively with or without filter function. The coupler belongs logically to the subordinate line (here: line).
Area coupler: Connection of a main line and an area line. Alternatively with or without filter function. The coupler belongs logically to the subordinate line (here: main line).
Amplifier: Preparation and repetition of telegrams on a line, no filter function. Division of a line into max. 4 independent line segments (max. 3 line amplifiers connected in parallel per line). Each line segment requires a separate power supply including a choke