CLC IEC/TR 61511-0:2019

Functional safety - Safety instrumented systems for the process industry sector - Part 0: Functional safety for the process industry and IEC 61511

This part of IEC 61511 provides an overview of the other three parts of IEC 61511.

Funktionale Sicherheit - PLT-Sicherheitseinrichtungen für die Prozessindustrie - Teil 0: Funktionale Sicherheit für die Prozessindustrie und IEC 61511

This part of IEC 61511 provides an overview of the other three parts of IEC 61511.

Sécurité fonctionnelle - Systèmes instrumentés de sécurité pour le secteur des industries de transformation - Partie 0: Sécurité fonctionnelle relative aux industries de transformation et l’IEC 61511

Funkcijska varnost - Sistemi z varnostnimi instrumenti za sektor procesne industrije - 0. del: Funkcijska varnost za procesno industrijo in IEC 61511

Ta del standarda IEC 61511 podaja pregled drugih treh delov standarda IEC 61511.

General Information

• Status: Published
• Publication Date: 04-Jul-2019
• ICS: 13.110 - Safety of machinery
• ICS: 25.040.01 - Industrial automation systems in general
• Technical Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Drafting Committee: CLC/TC 65X - Industrial-process measurement, control and automation
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 05-Jul-2019
• Due Date: 07-Aug-2020
• Completion Date: 05-Jul-2019
• Ref Project: SIST-TP CLC IEC/TR 61511-0:2019 - Functional safety - safety instrumented systems for the process industry sector - Part 0: Functional safety for the process industry and IEC 61511

Overview

CLC IEC/TR 61511-0:2019 (IEC TR 61511-0:2018) is a technical report that provides a concise overview of the IEC 61511 series on functional safety for the process industry. Part 0 explains the purpose and structure of the three normative/informative parts of IEC 61511 and describes the Safety Instrumented System (SIS) environment, typical SIS components, and the role of lifecycle management in achieving risk reduction.

Key topics and requirements

• Scope and intent
  • Part 0 summarizes the IEC 61511 series and how it applies to SIS based on electrical, electronic and programmable electronic technology.
• SIS structure and components
  • Describes typical Safety Instrumented Functions (SIF) consisting of sensors, logic solvers and final control elements (valves, pumps).
• Causes of SIS failure
  • Distinguishes random component failures and systematic failures (including human error), and stresses the need for both reliable components and lifecycle controls.
• SIS lifecycle management
  • Highlights lifecycle phases and Functional Safety Assessment (FSA) stages used to manage specification, design, installation, commissioning, operation, maintenance, modification and decommissioning.
• Part-level roles in the standard series
  • Part 1 (IEC 61511-1) – Normative: framework, terminology, requirements for specification, hardware, application programming, commissioning, validation, operation, maintenance, testing and lifecycle management (responsibilities, competency, supplier quality, change/bypass management, verification and audits).
  • Part 2 (IEC 61511-2) – Informative: guidance and implementation examples for Part 1 requirements.
  • Part 3 (IEC 61511-3) – Informative: methods for Hazard & Risk Assessment (H&RA) and determination of Safety Integrity Levels (SIL).
• Compliance and best practice
  • Notes IEC 61511 is widely recognized as good engineering practice and increasingly incorporated into regulation.

Practical applications and users

Who uses this standard:

• Process safety engineers, control systems designers and SIS integrators
• Plant owners, asset managers and operations personnel
• Safety auditors, certification bodies and regulators
• Equipment and software suppliers

Typical uses:

• Developing internal procedures and SIS lifecycle management systems
• Specifying SIFs and selecting SIS components
• Conducting H&RA and determining required SILs
• Commissioning, validation, maintenance, testing and change control of SIS
• Supplier quality management and compliance assessments

Related standards

• IEC 61511-1:2016 (framework and requirements)
• IEC 61511-2:2016 (guidelines for application)
• IEC 61511-3:2016 (guidance for SIL determination)
• Endorsed in Europe as CLC IEC/TR 61511-0:2019 (CENELEC)

Keywords: IEC 61511, functional safety, safety instrumented systems, SIS lifecycle, Safety Integrity Level (SIL), hazard and risk assessment, process industry.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2019
Funkcijska varnost - Sistemi z varnostnimi instrumenti za sektor procesne
industrije - 0. del: Funkcijska varnost za procesno industrijo in IEC 61511
Functional safety - safety instrumented systems for the process industry sector - Part 0:
Functional safety for the process industry and IEC 61511
Funktionale Sicherheit - PLT-Sicherheitseinrichtungen für die Prozessindustrie - Teil 0:
Funktionale Sicherheit für die Prozessindustrie und IEC 61511
Sécurité fonctionnelle - Systèmes instrumentés de sécurité pour le secteur des industries
de transformation - Partie 0: Sécurité fonctionnelle relative aux industries de
transformation et l’IEC 61511
Ta slovenski standard je istoveten z: CLC IEC/TR 61511-0:2019
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.

TECHNICAL REPORT CLC IEC/TR 61511-0

RAPPORT TECHNIQUE
TECHNISCHER BERICHT
July 2019
ICS 13.110; 25.040.01
English Version
Functional safety - Safety instrumented systems for the process
industry sector - Part 0: Functional safety for the process
industry and IEC 61511
(IEC/TR 61511-0:2018)
Sécurité fonctionnelle - Systèmes instrumentés de sécurité Funktionale Sicherheit - PLT-Sicherheitseinrichtungen für
pour le secteur des industries de transformation - Partie 0: die Prozessindustrie - Teil 0: Funktionale Sicherheit für die
Sécurité fonctionnelle relative aux industries de Prozessindustrie und IEC 61511
transformation et l'IEC 61511 (IEC/TR 61511-0:2018)
(IEC/TR 61511-0:2018)
This Technical Report was approved by CENELEC on 2019-07-01.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC IEC/TR 61511-0:2019 E

European foreword
This document (CLC IEC/TR 61511-0:2019) consists of the text of IEC/TR 61511-0:2018 prepared by
IEC/SC 65A "System aspects", of IEC technical committee 65 "Industrial-process measurement,
control and automation".
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/TR 61511-0:2018 was approved by CENELEC as a
European Standard without any modification.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61511-1 2016 Functional safety - Safety instrumented EN 61511-1 2017
systems for the process industry sector -
Part 1: Framework, definitions, system,
hardware and application programming
requirements
IEC 61511-2 2016 Functional safety - Safety instrumented EN 61511-2 2017
systems for the process industry sector -
Part 2: Guidelines for the application of IEC
61511-1:2016
IEC 61511-3 2016 Functional safety - Safety instrumented EN 61511-3 2017
systems for the process industry sector -
Part 3: Guidance for the determination of
the required safety integrity levels

IEC TR 61511-0 ®
Edition 1.0 2018-01
TECHNICAL
REPORT
Functional safety – Safety instrumented systems for the process industry

sector –
Part 0: Functional safety for the process industry and IEC 61511

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.110, 25.040.01 ISBN 978-2-8322-5302-1

– 2 – IEC TR 61511-0:2018 © IEC 2018
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Process industry environment and the Safety Instrumented System (SIS) . 5
4.1 General . 5
4.2 Safety Instrumented Functions (SIF) . 6
4.3 Safety Instrumented System (SIS) components . 6
5 IEC 61511 – Part 1 . 6
6 IEC 61511 – Part 2 . 8
7 IEC 61511 – Part 3 . 8
8 Utilization of IEC 61511 in system design . 8

Figure 1 – SIS safety life-cycle phases and functional safety assessment (FSA) stages. 7

IEC TR 61511-0:2018 © IEC 2018 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FUNCTIONAL SAFETY –
SAFETY INSTRUMENTED SYSTEMS
FOR THE PROCESS INDUSTRY SECTOR –

Part 0: Functional safety for the process industry and IEC 61511

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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consensus of opinion on the relevant subjects since each technical committee has representation from all
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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between any IEC Publication and the corresponding
...