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EN 61508-5:2010

Current
Current

The latest, up-to-date edition.

Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 5: Examples of methods for the determination of safety integrity levels
Published date

28-05-2010

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions and abbreviations
Annex A (informative) - Risk and safety integrity - General
        concepts
Annex B (informative) - Selection of methods for determining
        safety integrity level requirements
Annex C (informative) - ALARP and tolerable risk concepts
Annex D (informative) - Determination of safety integrity
        levels - A quantitative method
Annex E (informative) - Determination of safety integrity
        levels - Risk graph methods
Annex F (informative) - Semi-quantitative method using
        layer of protection analysis (LOPA)
Annex G (informative) - Determination of safety integrity
        levels - A qualitative method - hazardous event severity
        matrix
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

IEC 61508-5:2010 provides information on the underlying concepts of risk and the relationship of risk to safety integrity (see Annex A); a number of methods that will enable the safety integrity levels for the E/E/PE safety-related systems to be determined (see Annexes C, D, E, F and G). The method selected will depend upon the application sector and the specific circumstances under consideration. Annexes C, D, E, F and G illustrate quantitative and qualitative approaches and have been simplified in order to illustrate the underlying principles. These annexes have been included to illustrate the general principles of a number of methods but do not provide a definitive account. Those intending to apply the methods indicated in these annexes should consult the source material referenced. This second edition cancels and replaces the first edition published in 1998. This edition constitutes a technical revision. It has been subject to a thorough review and incorporates many comments received at the various revision stages.

NEW! Also available: IEC Standards+ 61508:2010, containing all parts, together with a commented Redline version. Changes made in this 2nd edition are highlighted and commented by a leading world expert.

This publication is of high relevance for Smart Grid.

DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Current

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EN 13463-6:2005 Non-electrical equipment for use in potentially explosive atmospheres - Part 6: Protection by control of ignition source 'b'
DIN EN 81-2:2000-05 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 2: HYDRAULIC LIFTS
EN 61508-2:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems
EN 60300-3-4:2008 Dependability management - Part 3-4: Application guide - Guide to the specification of dependability requirements
EN 61557-15:2014 Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 15: Functional safety requirements for insulation monitoring devices in IT systems and equipment for insulation fault location in IT systems
BS EN 61511-3:2017 Functional safety. Safety instrumented systems for the process industry sector Guidance for the determination of the required safety integrity levels
12/30268377 DC : 0 BS EN 50156-2 - ELECTRICAL EQUIPMENT FOR FURNACES AND ANCILLARY EQUIPMENT - PART 2: REQUIREMENTS FOR DESIGN, DEVELOPMENT AND TYPE APPROVAL OF SAFETY DEVICES AND SUBSYSTEMS
I.S. EN 13463-6:2005 NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 6: PROTECTION BY CONTROL OF IGNITION SOURCE 'B'
UNE-EN 50271:2011 Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen - Requirements and tests for apparatus using software and/or digital technologies
CEN/TR 16787:2014 Industrial Gas Installation - Guideline
BS EN 50402:2017 Electrical apparatus for the detection and measurement of combustible or toxic gases or vapours or of oxygen. Requirements on the functional safety of gas detection systems
PREN 81-50 : DRAFT 2011 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - EXAMINATIONS AND TESTS - PART 50: DESIGN RULES, CALCULATIONS, EXAMINATIONS AND TESTS OF LIFT COMPONENTS
BS EN 61508-3:2010 Functional safety of electrical/electronic/ programmable electronic safety-related systems Software requirements
I.S. EN 50156-2:2015 ELECTRICAL EQUIPMENT FOR FURNACES AND ANCILLARY EQUIPMENT - PART 2: REQUIREMENTS FOR DESIGN, DEVELOPMENT AND TYPE APPROVAL OF SAFETY DEVICES AND SUBSYSTEMS
BS EN 15333-1:2008 Respiratory equipment. Open-circuit umbilical supplied compressed gas diving apparatus Demand apparatus
PREN 50402 : DRAFT 2013 ELECTRICAL APPARATUS FOR THE DETECTION AND MEASUREMENT OF COMBUSTIBLE OR TOXIC GASES OR VAPOURS OR OF OXYGEN - REQUIREMENTS ON THE FUNCTIONAL SAFETY OF FIXED GAS DETECTION SYSTEMS
EN 50402:2017 Electrical apparatus for the detection and measurement of combustible or toxic gases or vapours or of oxygen - Requirements on the functional safety of gas detection systems
I.S. EN 50156-1:2015 ELECTRICAL EQUIPMENT FOR FURNACES AND ANCILLARY EQUIPMENT - PART 1: REQUIREMENTS FOR APPLICATION DESIGN AND INSTALLATION
EN 50271:2010 Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen - Requirements and tests for apparatus using software and/or digital technologies
EN 81-22:2014 Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 22: Electric lifts with inclined path
UNI EN 81-20 : 2014 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - LIFTS FOR THE TRANSPORT OF PERSONS AND GOODS - PART 20: PASSENGER AND GOODS PASSENGER LIFTS
S.R. CWA 15902-1:2009 LIFTING AND LOAD-BEARING EQUIPMENT FOR STAGES AND OTHER PRODUCTION AREAS WITHIN THE ENTERTAINMENT INDUSTRY - PART 1: GENERAL REQUIREMENTS (EXCLUDING ALUMINIUM AND STEEL TRUSSES AND TOWERS)
DIN EN 81-20 E : 2014 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - LIFTS FOR THE TRANSPORT OF PERSONS AND GOODS - PART 20: PASSENGER AND GOODS PASSENGER LIFTS
DIN EN 15233:2007-11 Methodology for functional safety assessment of protective systems for potentially explosive atmospheres
DIN EN 13042-5 E : 2009 MACHINES AND PLANTS FOR THE MANUFACTURE, TREATMENT AND PROCESSING OF HOLLOW GLASS -SAFETY REQUIREMENTS - PART 5: PRESSES
UNI EN 81-22 : 2014 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - LIFTS FOR THE TRANSPORT OF PERSONS AND GOODS - PART 22: ELECTRIC LIFTS WITH INCLINED PATH
BS EN 15233:2007 Methodology for functional safety assessment of protective systems for potentially explosive atmospheres
UNE-EN 81-20:2017 Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 20: Passenger and goods passenger lifts
I.S. EN 13042-5:2003 MACHINES AND PLANTS FOR THE MANUFACTURE, TREATMENT AND PROCESSING OF HOLLOW GLASS - SAFETY REQUIREMENTS - PART 5: PRESSES
I.S. EN 14143:2013 RESPIRATORY EQUIPMENT - SELF-CONTAINED RE-BREATHING DIVING APPARATUS
I.S. EN 81-1:1999 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 1: ELECTRIC LIFTS
DIN EN 13463-6:2005-07 NON-ELECTRICAL EQUIPMENT FOR USE IN POTENTIALLY EXPLOSIVE ATMOSPHERES - PART 6: PROTECTION BY CONTROL OF IGNITION SOURCE 'B'
I.S. EN 81-2:1999 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 2: HYDRAULIC LIFTS
NF EN 15333-1 : 2011 RESPIRATORY EQUIPMENT - OPEN-CIRCUIT UMBILICAL SUPPLIED COMPRESSED GAS DIVING APPARATUS - PART 1: DEMAND APPARATUS
PREN 50156-2 : DRAFT 2012 ELECTRICAL EQUIPMENT FOR FURNACES AND ANCILLARY EQUIPMENT - PART 2: REQUIREMENTS FOR DESIGN, DEVELOPMENT AND TYPE APPROVAL OF SAFETY DEVICES AND SUBSYSTEMS
07/30169528 DC : 0 BS EN 15333-2 - RESPIRATORY EQUIPMENT - OPEN-CIRCUIT UMBILICAL SUPPLIED COMPRESSED GAS DIVING APPARATUS - PART 2: FREE FLOW APPARATUS
PD CEN/TR 16787:2014 Industrial Gas Installation. Guideline
BS EN 1012-3:2013 Compressors and vacuum pumps. Safety requirements Process compressors
04/30115623 DC : DRAFT JUN 2004 EN 50402 - ELECTRICAL APPARATUS FOR THE DETECTION AND MEASUREMENT OF COMBUSTIBLE OR TOXIC GASES OR VAPOURS OR OF OXYGEN - REQUIREMENTS ON THE FUNCTIONAL SAFETY OF FIXED GAS DETECTION SYSTEMS
UNI EN 15333-2 : 2009 RESPIRATORY EQUIPMENT - OPEN-CIRCUIT UMBILICAL SUPPLIED COMPRESSED GAS DIVING APPARATUS - PART 2: FREE FLOW APPARATUS
UNI EN 15333-1 : 2008 RESPIRATORY EQUIPMENT - OPEN-CIRCUIT UMBILICAL SUPPLIED COMPRESSED GAS DIVING APPARATUS - PART 1: DEMAND APPARATUS
I.S. EN 15333-1:2008 RESPIRATORY EQUIPMENT - OPEN-CIRCUIT UMBILICAL SUPPLIED COMPRESSED GAS DIVING APPARATUS - PART 1: DEMAND APPARATUS
NF EN 50271 : 2010 ELECTRICAL APPARATUS FOR THE DETECTION AND MEASUREMENT OF COMBUSTIBLE GASES, TOXIC GASES OR OXYGEN - REQUIREMENTS AND TESTS FOR APPARATUS USING SOFTWARE AND/OR DIGITAL TECHNOLOGIES
DIN EN 14143:2013-10 RESPIRATORY EQUIPMENT - SELF-CONTAINED RE-BREATHING DIVING APPARATUS
DIN EN 15233 E : 2007 METHODOLOGY FOR FUNCTIONAL SAFETY ASSESSMENT OF PROTECTIVE SYSTEMS FOR POTENTIALLY EXPLOSIVE ATMOSPHERES
BS EN 81-22:2014 Safety rules for the construction and installation of lifts. Lifts for the transport of persons and goods Electric lifts with inclined path
UNE-EN 81-22:2014 Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 22: Electric lifts with inclined path
UNE-EN 81-2:2001 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 2: HYDRAULIC LIFTS.
UNI EN 14143 : 2013 RESPIRATORY EQUIPMENT - SELF-CONTAINED RE-BREATHING DIVING APPARATUS
UNI EN 81-2 : 2010 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 2: HYDRAULIC LIFTS
UNI EN 1012-3 : 2014 COMPRESSORS AND VACUUM PUMPS - SAFETY REQUIREMENTS - PART 3: PROCESS COMPRESSORS
UNI EN 81-1 : 2010 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 1: ELECTRIC LIFTS
UNI EN 13042-5 : 2010 MACHINES AND PLANTS FOR THE MANUFACTURE, TREATMENT AND PROCESSING OF HOLLOW GLASS - SAFETY REQUIREMENTS - PART 5: PRESSES
BS EN 61508-2:2010 Functional safety of electrical/electronic/ programmable electronic safety-related systems Requirements for electrical/electronic/ programmable electronic safety-related systems
BS EN 15333-2:2009 Respiratory equipment. Open-circuit umbilical supplied compressed gas diving apparatus Free flow apparatus
DIN EN 15333-2:2009-07 RESPIRATORY EQUIPMENT - OPEN-CIRCUIT UMBILICAL SUPPLIED COMPRESSED GAS DIVING APPARATUS - PART 2: FREE FLOW APPARATUS
07/30166811 DC : 0 BS EN ISO 23125 - SAFETY OF MACHINE TOOLS - TURNING MACHINES
EN 62619:2017 Secondary cells and batteries containing alkaline or other non-acid electrolytes - Safety requirements for secondary lithium cells and batteries, for use in industrial applications
I.S. EN 50090-2-3:2005 HOME AND BUILDING ELECTRONIC SYSTEMS (HBES) - PART 2-3: SYSTEM OVERVIEW - GENERAL FUNCTIONAL SAFETY REQUIREMENTS FOR PRODUCTS INTENDED TO BE INTEGRATED IN HBES
02/645215 DC : DRAFT OCT 2002 EN 50090-2-3:2002 - HOME AND BUILDING ELECTRONIC SYSTEMS (HBES) - PART 2-3: SYSTEM OVERVIEW - GENERAL FUNCTIONAL SAFETY REQUIREMENTS FOR PRODUCTS INTENDED TO BE INTEGRATED IN HBES
04/30086349 DC : DRAFT APR 2004 EN ISO 13849-1 - SAFETY OF MACHINERY - SAFETY-RELATED PARTS OF CONTROL SYSTEMS - PART 1: GENERAL PRINCIPLES FOR DESIGN
BS EN 61508-4:2010 Functional safety of electrical/electronic/ programmable electronic safety related systems Definitions and abbreviations
BS EN 50271:2010 Electrical apparatus for the detection and measurement of combustible gases, toxic gases or oxygen. Requirements and tests for apparatus using software and/or digital technologies
I.S. EN 15333-2:2009 RESPIRATORY EQUIPMENT - OPEN-CIRCUIT UMBILICAL SUPPLIED COMPRESSED GAS DIVING APPARATUS - PART 2: FREE FLOW APPARATUS
I.S. EN 50271:2010 ELECTRICAL APPARATUS FOR THE DETECTION AND MEASUREMENT OF COMBUSTIBLE GASES, TOXIC GASES OR OXYGEN - REQUIREMENTS AND TESTS FOR APPARATUS USING SOFTWARE AND/OR DIGITAL TECHNOLOGIES
DIN EN 81-22:2014-12 Safety rules for the construction and installation of lifts - Lifts for the transport of persons and goods - Part 22: Electric lifts with inclined path
BS EN 13463-6:2005 Non-electrical equipment for potentially explosive atmospheres Protection by control of ignition source \'b\'
BS EN 81-1 : 1998 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 1: ELECTRIC LIFTS
BS EN 81-2 : 1998 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 2: HYDRAULIC LIFTS
BS EN 81-20:2014 Safety rules for the construction and installation of lifts. Lifts for the transport of persons and goods Passenger and goods passenger lifts
BS EN 14143:2013 Respiratory equipment. Self-contained re-breathing diving apparatus
BS EN 13042-5 : 2003 MACHINES AND PLANTS FOR THE MANUFACTURE, TREATMENT AND PROCESSING OF HOLLOW GLASS - SAFETY REQUIREMENTS - PART 5: PRESSES
BS EN 50156-1:2015 Electrical equipment for furnaces and ancillary equipment Requirements for application design and installation
12/30260546 DC : 0 BS EN 50156-1 - ELECTRICAL EQUIPMENT FOR FURNACES AND ANCILLARY EQUIPMENT - PART 1: REQUIREMENTS FOR APPLICATION DESIGN AND INSTALLATION
UNE-EN 14143:2014 Respiratory equipment - Self-contained re-breathing diving apparatus
DIN EN 13042-5:2009-12 Machines and plants for the manufacture, treatment and processing of hollow glass - Safety requirements - Part 5: Presses (includes Amendment A1:2009)
DIN EN 81-2:2010-08 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 2: HYDRAULIC LIFTS
EN 14143:2013 Respiratory equipment - Self-contained re-breathing diving apparatus
EN 81-2 : 1998 + A3 2009 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 2: HYDRAULIC LIFTS
EN 15333-2:2009 Respiratory equipment - Open-circuit umbilical supplied compressed gas diving apparatus - Part 2: Free flow apparatus
EN 15233:2007 Methodology for functional safety assessment of protective systems for potentially explosive atmospheres
EN 81-1:1998+A3:2009 Safety rules for the construction and installation of lifts - Part 1: Electric lifts
EN 13042-5:2003+A1:2009 Machines and plants for the manufacture, treatment and processing of hollow glass - Safety requirements - Part 5: Presses
DIN EN 15333-1:2008-04 RESPIRATORY EQUIPMENT - OPEN-CIRCUIT UMBILICAL SUPPLIED COMPRESSED GAS DIVING APPARATUS - PART 1: DEMAND APPARATUS
I.S. EN 81-22:2014 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - LIFTS FOR THE TRANSPORT OF PERSONS AND GOODS - PART 22: ELECTRIC LIFTS WITH INCLINED PATH
12/30243459 DC : 0 BS ISO/IEC 80079-37 - EXPLOSIVE ATMOSPHERES - PART 37: NON-ELECTRICAL EQUIPMENT FOR USE IN EXPLOSIVE ATMOSPHERES - NON-ELECTRICAL TYPE OF PROTECTION CONSTRUCTIONAL SAFETY 'CH', CONTROL OF IGNITION SOURCES 'BH', LIQUID IMMERSION 'KH'
BS EN 62619:2017 Secondary cells and batteries containing alkaline or other non-acid electrolytes. Safety requirements for secondary lithium cells and batteries, for use in industrial applications
BS EN 60300-3-4:2008 Dependability management Application guide. Guide to the specification of dependability requirements
CEI EN 50271 : 2011 ELECTRICAL APPARATUS FOR THE DETECTION AND MEASUREMENT OF COMBUSTIBLE GASES, TOXIC GASES OR OXYGEN - REQUIREMENTS AND TESTS FOR APPARATUS USING SOFTWARE AND/OR DIGITAL TECHNOLOGIES
I.S. EN 81-20:2014 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - LIFTS FOR THE TRANSPORT OF PERSONS AND GOODS - PART 20: PASSENGER AND GOODS PASSENGER LIFTS
10/30216944 DC : 0 BS EN 81-22 - SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - LIFTS FOR TRANSPORT OF PERSONS AND GOODS - PART 22: ELECTRIC LIFTS WITH INCLINED PATH
BS EN 61557-15:2014 Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures Functional safety requirements for insulation monitoring devices in IT systems and equipment for insulation fault location in IT systems
EN 1012-3:2013 Compressors and vacuum pumps - Safety requirements - Part 3: Process compressors
EN 61511-3:2017 Functional safety - Safety instrumented systems for the process industry sector - Part 3: Guidance for the determination of the required safety integrity levels
EN 50156-1:2015 Electrical equipment for furnaces and ancillary equipment - Part 1: Requirements for application design and installation
EN 50156-2:2015 Electrical equipment for furnaces and ancillary equipment - Part 2: Requirements for design, development and type approval of safety devices and subsystems
DIN EN 81-1:2010-06 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 1: ELECTRIC LIFTS
DIN EN 81-1:2000-05 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - PART 1: ELECTRIC LIFTS
EN 15333-1 : 2008/AC : 2009 RESPIRATORY EQUIPMENT - OPEN-CIRCUIT UMBILICAL SUPPLIED COMPRESSED GAS DIVING APPARATUS - PART 1: DEMAND APPARATUS
EN 61508-4:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 4: Definitions and abbreviations
DIN EN 81-20:2014-11 SAFETY RULES FOR THE CONSTRUCTION AND INSTALLATION OF LIFTS - LIFTS FOR THE TRANSPORT OF PERSONS AND GOODS - PART 20: PASSENGER AND GOODS PASSENGER LIFTS
EN 50090-2-3:2005 Home and Building Electronic Systems (HBES) - Part 2-3: System overview - General functional safety requirements for products intended to be integrated in HBES
EN 61508-3:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 3: Software requirements

EN 61508-1:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 1: General requirements
IEC 61511-1:2016+AMD1:2017 CSV Functional safety - Safety instrumented systems for the process industry sector - Part 1: Framework, definitions, system, hardware and application programming requirements
IEC/ISO 31010:2009 Risk management - Risk assessment techniques
ISA 84.01 : 1996 APPLICATION OF SAFETY INSTRUMENTED SYSTEMS FOR THE PROCESS INDUSTRIES
IEC 61508-4:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 4: Definitions and abbreviations (see Functional Safety and IEC 61508)
IEC 61508-3:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 3: Software requirements (see Functional Safety and IEC 61508)
ISO 10418:2003 Petroleum and natural gas industries Offshore production installations Analysis, design, installation and testing of basic surface process safety systems
ISO/TR 14121-2:2012 Safety of machinery — Risk assessment — Part 2: Practical guidance and examples of methods
IEC 61508-6:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 6: Guidelines on the application of IEC 61508-2 and IEC 61508-3 (see Functional Safety and IEC 61508)
IEC 61508-1:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 1: General requirements (see Functional Safety and IEC 61508)
IEC 62061:2005+AMD1:2012+AMD2:2015 CSV Safety of machinery - Functional safety of safety-related electrical, electronic and programmable electronic control systems
IEC 61508-7:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 7: Overview of techniques and measures (see Functional Safety and IEC 61508)
ISO 13849-1:2015 Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design
IEC 61508-2:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems (see Functional Safety and IEC 61508)
IEC 61800-5-2:2016 Adjustable speed electrical power drive systems - Part 5-2: Safety requirements - Functional
EN 61508-4:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems - Part 4: Definitions and abbreviations

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