IEC 61511 is an international standard that addresses the application of Safety Instrumented Systems (SIS) for the process industry sector. It defines requirements for the specification, design, installation, operation, and maintenance of SIS, ensuring safety integrity levels (SIL) are achieved to mitigate process hazards and reduce risk. It is commonly used to ensure that safety systems in chemical plants, oil refineries, and other process industry facilities function reliably and predictably in the event of a hazardous situation.
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