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Appendix H — A Standardized Architecture for Safety Mechanisms

Every safety mechanism has the same anatomy; give them one architecture.

Safety mechanisms are all diagnostic functions — watch a signal, confirm a fault, react in time — yet scattered implementations share a processor, timebase, and scheduler no one ever drew. The chapter proposes one architecture of detectors and a central fault manager, then derives its fault tree: the residual single points are the safe-state actuation, and the manager and platform are common causes across every fault case.