Public transport vehicle door closing-opening control unit - uses central control unit coupled via data bus to sub-stations

摘要

The door opening and closing is controlled by an allocated substation and a central control unit coupled by data bus to the substations. The substations (14,15...21) connect alternately to one of two or more data bus systems in such a way that substations on adjoining doors connect to different bus systems. There are fewer bus systems than substations. ADVANTAGE - Redundant data bus system ensures certain doors operate in event of bus failure etc.