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IS/IEC 61508-1 (1998): Functional Safety of Electrical/Electronic

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IS/IEC 61508-1 (1998): Functional Safety of Electrical/Electronic इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान का अधकार, जी का अधकार” “परा को छोड न 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS/IEC 61508-1 (1998): Functional safety of electrical/electronic/programmable electronic safety-related systems, Part 1: General requirements [ETD 18: Industrial Process Measurement and Control] “ान $ एक न भारत का नमण” Satyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” “ान एक ऐसा खजाना > जो कभी चराया नह जा सकताह ै”ै Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS/IEC 61508-1 : 1998 FUNCTIONAL SAFETY OF ELECTRICAL/ ELECTRONIC/PROGRAMMABLE ELECTRONIC SAFETY-RELATED SYSTEMS PART1 GENERAL REQUIREMENTS ICS 13.110; 25.040; 29.020; 35.240.50 ©BIS 2008 BUREAU OF INDIAN STANDARDS MANAK BHAVAN,-9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 October 2008 Price Group 14 IS/IEC 61508-1 : 1998 CONTENTS Page Clause 1 Scope................................................................................................................. ..................... 1 2 Normative references........................................................................................ ....................... 3 3 Definitions and abbreviations ......................................... .......................................................... 4 4 Conformance to this standard ................................................................................................... 4 5 Documentation ......................................................................................................................... 5 5.1 Objectives ...................................................................................................................... 5 5.2 Requirements................................................................................................................. 6 6 Management of functional safety............................................................................................... 7 6.1 Objectives ...................................................................................................................... 7 6.2 Requirements................................................................................................................. 7 7 Overall safety lifecycle requirements......................................................................................... 9 7.1 General........................................................................... ......................................... ,.... 9 7.2 Concept ........................................... .................................. ..........................................17 7.3 Overall scope definition............................. ................................. ............. .....................18 7.4 Hazard and risk analysis .................................................................................................18 7.5 Overall safety requirements ................................................................................. ..........20 7.6 Safety requirements allocation ........................................................................................22 7.7 Overall operation and maintenance planning......................................................... .........28 7.8 Overall safety validation planning ....................................................................................29 7.9 Overall installation and commissioning planning.............................................................. 30 7.10 Realisation: E/E/PES ................................................. ............. ......................................31 7.11 Realisation: other technology ..........................................................................................31 7.12 Realisation: external risk reduction facilities.....................................................................31 7.13 Overall installation and commissioning...................................................................... …. 32 7.14 Overall safety validation ..................................................................................................32 7.15 Overall operation, maintenance and repair ......................................................................33 7.16 Overall modification and retrofit............................................................................... .......36 7.17 Decommissioning or disposal..........................................................................................38 7.18 Verification....................................................................................... '............................. 39 8 Functional safety assessment .............................................................................................. ....39 8.1 Objective........................................................................................................................ 40 8.2 Requirements ................ ....................………………………………………………………...40 i IS/IEC 61508-1 : 1998 Annexes Annex A (informative) Example documentation structure................................................................ 43 A.1 General .......................................................................................................................... 43 A.2 Safety lifecycle document structure................................................................................. 44 A.3 Physical document structure ........................................................................................... 44 A.4 List of documents................ '. .......................................................................................... 49 Annex B (informative) Competence of persons.............................................................................. 50 B.1 Objective ....................................................................................................................... 50 B.2 General considerations .................................................................................................. 50 Annex C (informative) Bibliography .................................................................... ......................... 51 Tables 1 Overall safety lifecycle: overview ............................................................................................. 13 2 Safety integrity levels: target failure measures for a safety function, allocated to an E/E/PE safety-related system operating in low demand mode of operation .........................26 3 Safety integrity levels: target failure measures for a safety function, allocated to an E/E/PE safety-related system operating in high demand or continuous mode of operation........... , ............................................................................................ : .................. 26 4 Minimum levels of independence of those carrying out functional safety assessment (overall safety lifecycle phases 1 to 8 and 12 to 16 inclusive (see figure 2))......................................... 42 5 Minimum levels of independence of those carrying out functional safety assessment (overall safety lifecycle phase 9 - includes all phases of E/E/PES and software safety lifecycles (see figures 2, 3 and 4)) ................................................................................................................ 42 A.1 Example documentation structure for information related to the overall safety lifecycle....................................................................................................................... 45 A.2 Example documentation structure for information related to the E/E/PES safety lifecycle....................................................................................................................... 46 A.3 Example documentation structure for information related to the software safety lifecycle ....................................................................................................................... 47 Figures 1 Overall framework of this standard........................................................................... : ............. 3 2 Overall safety lifecycle ............................................................................................................ 10 3 E/E/PES safety lifecycle (in realisation phase) .............. ....................................................... 11 4 Software safety lifecycle (in realisation phase) ........................................................................ 11 5 Relationship of overall safety lifecycle to E/E/PES and software safety lifecycles .................... 12 6 Allocation of safety requirements to the E/E/PE safety-related systems, other technology safety-related systems and external risk reduction facilities .......................... 25 7 Example
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