Interface device between a motion sensor for KNX bus and the lights using a DALI bus

摘要

The device (2) has a controlling stage (3) for controlling lights. A supplying stage (4) supplies power to the controlling stage. A voltage isolation stage is arranged among the lights and a microcontroller. The controlling stage comprises a reception circuit receiving data from a digital addressable lighting interface bus and a transmission circuit transmitting data to the bus. The reception and transmission circuits are connected to the microcontroller via the isolation stage. The isolation stage comprises opto-couplers arranged on connection lines of the circuits.