What is a safety-related system in the context of IEC 61508?
A safety-related system comprises everything (hardware, software and human elements) necessary to carry out one or more safety functions, where failure of the safety function would give rise to a significant increase in the risk to the safety of persons and/or the environment. A safety-related system can comprise standalone equipment dedicated to perform a particular safety function (such as a fire detection system) or can be integrated into other plant or equipment (such as motor speed control in a machine tool). Clause 3.4.1 of IEC 61508-4 gives a formal definition.
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- What is a safety-related system in the context of IEC 61508?
