{"id":"iec-61511","model_id":"IEC 61511-1:2016","name":"IEC 61511-1:2016 Functional safety – Safety instrumented systems for the process industry sector – Part 1","summary":"IEC 61511-1:2016 is an international standard that gives requirements for the specification, design, installation, operation and maintenance of a safety instrumented system (SIS) so that it can be entrusted to achieve or maintain a safe state of the process. It was developed as a process sector implementation of IEC 61508:2010. It is Part 1 of the IEC 61511 series and covers framework, definitions, system, hardware and application programming requirements.","study_notes":["Prepared by technical committee TC 65/SC 65A, System aspects.","Publication date 2016-02-24; second edition (2.0), 175 pages.","A consolidated version exists as IEC 61511-1:2016+AMD1:2017 CSV, edition 2.1, dated 2017-08-16.","The corrigendum of September 2016 (COR1:2016) is included in this copy.","ICS classifications: 13.110 and 25.040.01; stability date 2029; ISBN 9782832231593.","Adopted in the US as ANSI/ISA-61511-1-2018/IEC 61511-1:2016+AMD1:2017 CSV.","Part 2 of the series (IEC 61511-2:2016) gives guidelines for the application of Part 1; Part 3 covers determination of required safety integrity levels."],"safety_notes":["Establishes performance targets based on safety integrity levels (SIL) to manage risk.","Covers the SIS lifecycle from initial specification through decommissioning."],"sources":[{"url":"https://webstore.iec.ch/en/publication/24241","title":"IEC 61511-1:2016","accessed":"2026-10-25"},{"url":"https://www.isa.org/standards-and-publications/isa-standards/isa-84-standards","title":"ISA-84 Series of Standards","accessed":"2026-10-25"}],"verification":{"status":"source_checked","checked_at":"2026-10-25","values":4,"method":"llm_source_check"},"updated_at":"2026-10-25","type":"standard","spec":{"body":"IEC","reference":"IEC 61511-1","edition_year":2016,"status":"published","related":["iec-61508"]},"url":"https://machineschema.com/standard/iec-61511","license":"https://creativecommons.org/licenses/by/4.0/"}