Ring bus system with central office for alarm system

摘要

Data lines (11) are coupled to the central office (1) in a ring configuration, with bus components (2-3) looped into the data lines. A supply line (12), contg. a fuse (6) in a conductor (13) for the connected bus components, is allocated to the bus components. A further conductor (14) is laid in parallel to the fused conductor, with a fuse (7) for the bus components, which are coupled each to both conductors (13,14) via decoupling diodes (5). Pref. the two conductors are laid in the ring in opposite direction.