Continuous Mode of Operation Safety System

safety system designed to achieve its safety action permanently

Note 1 to entry: With a continuous mode safety system the hazardous event occurs as soon as the safety system

fails. This is illustrated in Figure B.1 where the systems states “KO” and “hazardous event” are gathered into a

single state.

Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards

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