EN 61511-1:2017/A1:2017
(Amendment)Functional safety - Safety instrumented systems for the process industry sector - Part 1: Framework, definitions, system, hardware and application programming Requirements
Functional safety - Safety instrumented systems for the process industry sector - Part 1: Framework, definitions, system, hardware and application programming Requirements
2017-05-03 - When published - possible update needed to implementation dates of Mother EN & Parts 2 & 3. BT decision to be taken at May 2017 meeting (156th)
Funktionale Sicherheit - PLT-Sicherheitseinrichtungen für die Prozessindustrie - Teil 1: Allgemeines, Begriffe, Anforderungen an Systeme, Hardware und Anwendungsprogrammierung
Sécurité fonctionnelle - Systèmes instrumentés de sécurité pour le secteur des industries de transformation - Partie 1: Cadre, définitions, exigences pour le système, le matériel et la programmation d'application
Funkcijska varnost - Sistemi z varnostnimi instrumenti za sektor procesne industrije - Normativi - 1. del: Ogrodje, definicije, sistem, zahteve za strojno in aplikacijsko programiranje (IEC 61511-1:2016/A1:2017)
General Information
- Status
- Published
- Publication Date
- 23-Nov-2017
- Withdrawal Date
- 19-Sep-2020
- Technical Committee
- CLC/TC 65X - Industrial-process measurement, control and automation
- Drafting Committee
- IEC/SC 65A - IEC_SC_65A
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 24-Nov-2017
- Completion Date
- 24-Nov-2017
Relations
- Effective Date
- 30-Aug-2016
Overview
EN 61511-1:2017/A1:2017 is a European harmonized standard that defines requirements for the functional safety of safety instrumented systems (SIS) used in the process industry sector. It provides a comprehensive framework, including key definitions, system requirements, hardware considerations, and application programming criteria to ensure safe and reliable operation of industrial control systems. This edition incorporates amendments to align with evolving industry practices and technical developments, enhancing the clarity and effectiveness of safety measures.
Developed by the European Committee for Electrotechnical Standardization (CENELEC), this standard builds upon the international IEC 61511-1:2016/A1:2017 and harmonizes it within European regulations. It addresses the full lifecycle management of safety instrumented systems, emphasizing risk reduction through systematic design, implementation, and maintenance.
Key Topics
Functional Safety Framework
EN 61511-1:2017/A1 provides a structured approach for managing functional safety in SIS, including crucial terminology and concepts such as Safety Integrity Level (SIL), diagnostic coverage, and hardware safety integrity.System and Hardware Requirements
The standard defines both hardware and software requirements for SIS to maintain integrity and reliability. It stipulates how devices involved in safety functions must be designed to tolerate fault conditions, including handling dangerous failures and implementing diagnostic strategies.Application Programming
Requirements for SIS application program development cover lifecycle phases, error avoidance techniques, validation procedures, and maintenance guidelines. The standard ensures that application software is systematically developed and verified to prevent and control failures effectively.Risk Assessment and Safety Allocation
EN 61511-1:2017/A1 emphasizes Hazard and Risk Assessment (H&RA) to identify protective layers and allocate safety functions appropriately to mitigate risks in process industries.Amendments and Updates
This amendment clarifies definitions (e.g., dangerous failure, diagnostic coverage), updates references to subsidiary parts (Parts 2 and 3 of EN 61511), and reinforces the alignment with security practices as referenced by IEC 62443 and ISO/IEC 27001.
Applications
Process Industry Safety Systems
Designed for industries such as oil and gas, chemicals, petrochemicals, pharmaceuticals, and manufacturing where safety instrumented systems are critical to prevent hazardous events.SIS Lifecycle Management
The standard guides engineering teams in design, installation, testing, and maintenance of SIS to ensure system performance meets prescribed safety integrity levels throughout operational life.Software and Hardware Development
Software developers and hardware manufacturers can use the specifications to create compliant SIS components and application programs that fulfill safety and reliability requirements.Integration with Security Standards
Organizations integrating safety with cybersecurity protocols benefit from the guidance related to SIS security, supporting the development of robust process control environments.
Related Standards
- EN 61511-2:2017 – Guidelines for the application of EN 61511-1:2017, providing procedural advice for implementing safety instrumented systems.
- EN 61511-3:2017 – Guidance for determining the required Safety Integrity Levels (SIL) based on risk assessments and system requirements.
- IEC 62443 Series – Standards focused on industrial automation and control system security, referenced for SIS security considerations.
- ISO/IEC 27001 – International standard for information security management, supporting the integration of security in SIS lifecycle management.
EN 61511-1:2017/A1:2017 remains an essential standard for ensuring the reliable and safe operation of Safety Instrumented Systems in the process industry, providing rigorous and internationally harmonized requirements that minimize risk and protect personnel, the environment, and assets.
Frequently Asked Questions
EN 61511-1:2017/A1:2017 is a amendment published by CLC. Its full title is "Functional safety - Safety instrumented systems for the process industry sector - Part 1: Framework, definitions, system, hardware and application programming Requirements". This standard covers: 2017-05-03 - When published - possible update needed to implementation dates of Mother EN & Parts 2 & 3. BT decision to be taken at May 2017 meeting (156th)
2017-05-03 - When published - possible update needed to implementation dates of Mother EN & Parts 2 & 3. BT decision to be taken at May 2017 meeting (156th)
EN 61511-1:2017/A1:2017 is classified under the following ICS (International Classification for Standards) categories: 13.110 - Safety of machinery; 25.040.01 - Industrial automation systems in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 61511-1:2017/A1:2017 has the following relationships with other standards: It is inter standard links to EN 61511-1:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 61511-1:2017/A1:2017 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2018
Funkcijska varnost - Sistemi z varnostnimi instrumenti za sektor procesne
industrije - Normativi - 1. del: Ogrodje, definicije, sistem, zahteve za strojno in
aplikacijsko programiranje (IEC 61511-1:2016/A1:2017)
Functional safety - Safety instrumented systems for the process industry sector -
Normative (uon) Part 1: Framework, definitions, system, hardware and software
requirements
Funktionale Sicherheit - PLT-Sicherheitseinrichtungen für die Prozessindustrie - Teil 1:
Allgemeines, Begriffe, Anforderungen an Systeme, Hardware und
Anwendungsprogrammierung (IEC 61511-1:2016/A1:2017)
Sécurité fonctionnelle - Systèmes instrumentés de sécurité pour le secteur des industries
de transformation - Partie 1: Cadre, définitions, exigences pour le système, le matériel et
la programmation d'application (IEC 61511-1:2016/A1:2017)
Ta slovenski standard je istoveten z: EN 61511-1:2017/A1:2017
ICS:
25.040.01 Sistemi za avtomatizacijo v Industrial automation
industriji na splošno systems in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 61511-1:2017/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2017
ICS 13.110; 25.040.01
English Version
Functional safety - Safety instrumented systems for the process
industry sector - Normative (uon) - Part 1: Framework,
definitions, system, hardware and software requirements
(IEC 61511-1:2016/A1:2017)
Sécurité fonctionnelle - Systèmes instrumentés de sécurité Funktionale Sicherheit - PLT-Sicherheitseinrichtungen für
pour le secteur des industries de transformation - Partie 1: die Prozessindustrie - Teil 1: Allgemeines, Begriffe,
Cadre, définitions, exigences pour le système, le matériel et Anforderungen an Systeme, Hardware und
la programmation d'application Anwendungsprogrammierung
(IEC 61511-1:2016/A1:2017) (IEC 61511-1:2016/A1:2017)
This amendment A1 modifies the European Standard EN 61511-1:2017; it was approved by CENELEC on 2017-09-20. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61511-1:2017/A1:2017 E
European foreword
The text of document 65A/777/FDIS, future edition 1 of IEC 61511-1:2016/A1:2017, prepared by
IEC/SC 65A "System aspects", of IEC/TC 65 "Industrial-process measurement, control and
automation" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which this document has (dop) 2018-06-20
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-09-20
standards conflicting with this
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 61511-1:2016/A1:2017 was approved by CENELEC as a
European Standard without any modification.
Replace the following references in the Bibliography of EN 61511-1:2017:
IEC 61511-2:2016 NOTE Harmonized as EN 61511-2:2017.
IEC 61511-3:2016 NOTE Harmonized as EN 61511-3:2017.
IEC 61511-1 ®
Edition 2.0 2017-08
INTERNATIONAL
STANDARD
AMENDMENT 1
Functional safety – Safety instrumented systems for the process industry
sector –
Part 1: Framework, definitions, system, hardware and application programming
requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.110; 25.040.01 ISBN 978-2-8322-4582-8
– 2 – IEC 61511-1:2016/AMD1:2017
© IEC 2017
FOREWORD
This amendment has been prepared by subcommittee 65A: System aspects, of IEC technical
committee 65: Industrial-process measurement, control and automation.
The text of this amendment is based on the following documents:
FDIS Report on voting
65A/844/FDIS 65A/848/RVD
Full information on the voting for the approval of
...
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