{"id":3796,"date":"2023-01-04T17:51:06","date_gmt":"2023-01-04T16:51:06","guid":{"rendered":"https:\/\/www.gt-engineering.it\/normative-tecniche\/%tipologia_normativa%\/iec-61511-gt-engineering\/"},"modified":"2023-06-26T10:26:19","modified_gmt":"2023-06-26T09:26:19","slug":"iec-61511-gt-engineering","status":"publish","type":"normativa_tecnica","link":"https:\/\/www.gt-engineering.it\/en\/technical-standards\/en-iec-standards\/iec-61511-gt-engineering\/","title":{"rendered":"IEC 61511: Safety instrumented systems for the process industry"},"content":{"rendered":"\n\n \n \n \n
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IEC 61511 (all parts) is intended as the process industry sector implementation of IEC 61508<\/a><\/strong>; it addresses the application of SISs (Safety Instrumented System) in the process industry. <\/span><\/p>\n

Safety Instrumented Functions (SIF) <\/strong>are protective functions implemented in a Safety Instrumented System (SIS)<\/strong>. A typical SIS is comprised of multiple SIFs; typically, each SIF has process sensors that measure a process deviation, a logic solver that executes the functional logic, and final control elements (e.g. valves) that bring the process to a safe state. The IEC 61511 series of standards addresses SIS based on the use of electrical, electronic, or programmable electronic technology in the process industry sector<\/strong>. IEC 61511 series also address a process Hazard and Risk Assessment (H&RA) from which the specification for SISs are derived.<\/span><\/p>\n

The standard recognises that systematic failures<\/strong> come from human errors<\/strong> and they can be reduced with the implementation of solid organisational processes.<\/span><\/p>\n

The first edition of the standard was issued in 2003. The second edition was published in 2016. The standard has four parts:<\/span><\/p>\n