Mw 1280mAKNX Power Supply KN X-40F cores % Typical application © Application 1:Powering KNX Bus Only 1. the maximum number of bus devices connected is 256 for TP1-256 topology. 3. the maximum distance batsmen two bus devices cannot exceed 700m. 4. the maximum length of a bus line I8 1000 m, keeping Info account all segments, @ Application 2:Pewerlng KNX Bus and KNX Davies PE N L KNX Bus Binds & Lighting devise Shutters Bus wiring consideration: 2.