Methods for the Safety Integrity Determination of an Electric/Electronic/Programmable Electronic System

摘要

Systems comprised of electrical, electronic and/or, more recent, programmable electronic systems (E/E/ PES) are widely in use for performing safety functions. There is a major interest in the correct safety integrity determination of these systems, as their unavailability might lead to catastrophic events. This paper reviews current approaches to determining the safety integrity of an E/E/ PES in safety related applications. It filters these methods by the specifics of the lift industry and it proposes an applicable solution. A practical example of an E/E/PE system performing a safety function from the lift industry is given and its safety integrity determination is modelled with respect to the chosen technique.