1、 ISO/IEC 14762 Edition 1.0 2009-01 INTERNATIONAL STANDARDInformation technology Functional safety requirements for home and building electronic systems (HBES) ISO/IEC 14762:2009(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 ISO/IEC, Geneva, Switzerland All rights reserved. Unless otherwi
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9、tion technology Functional safety requirements for home and building electronic systems (HBES) INTERNATIONAL ELECTROTECHNICAL COMMISSION M ICS 35.200 PRICE CODE ISBN 2-8318-1026-1 2 14762 ISO/IEC:2009(E) CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references .7 3 Terms, definitions and
10、abbreviations 8 4 Conformance10 5 General requirements.11 5.1 General .11 5.2 Method of establishment for the requirements .11 5.2.1 General .11 5.2.2 HBES application environment 11 5.2.3 Sources of hazards11 5.2.4 Hazardous events12 5.2.5 Derivation of requirements.12 6 Requirements for functional
11、 safety .12 6.1 General .13 6.2 Power feeding .13 6.2.1 Safe restart after power is restored (1) 13 6.2.2 Product marking and instructions prevent risk of wrong connections (3) (6)13 6.2.3 Product construction and design prevent wrong connections .13 6.3 Environment14 6.3.1 Product designed for appl
12、ication environment and specified temperature range (7)14 6.3.2 Resistance to abnormal heat and prevention of fire propagation (8).14 6.3.3 Withstand of mechanical stress appropriate to the application(s) (9)14 6.4 Lifetime .14 6.5 Reasonably foreseeable misuse14 6.5.1 Minimization of accidental dow
13、nload of wrong application software or parameters (15).14 6.5.2 Proper configuration and related parameters (15)15 6.5.3 Detection and/or indication of missing or incompletely configured products during configuration process (15) 15 6.6 Software and communication.15 6.6.1 Development process complia
14、nce with ISO 9000 or similar standards (16) .15 6.6.2 Check for proper operation of product software and integrity of the configuration (16) 15 6.6.3 Limitation of the traffic load imposed on the communication medium (12) (17) 15 6.6.4 Proper function of product and exclusion of hazards on reception
15、 of messages from multiple sources (23) 16 6.6.5 Defined state after a system reset (if any) (24) 16 6.6.6 Restricted access to manual configuration of system parameters (24) .16 6.6.7 Disturbed communication 16 6.7 Remote operations 17 14762 ISO/IEC:2009(E) 3 6.7.1 General recommendations.17 6.7.2
16、Within a single building or in its immediate vicinity.17 6.7.3 From outside the building 18 6.7.4 Management18 Annex A (informative) Example of a method for the determination of safety integrity levels .20 A.1 General 20 A.2 Terms and definitions .20 A.3 As low as reasonably practicable (ALARP) and
17、tolerable risk concepts 21 Annex B (informative) Hazards and development of necessary functional safety requirements 22 Annex C (informative) Some examples of non safety related HBES applications28 C.1 General 28 C.2 Example 1: Oven28 C.3 Example 2: Devices presenting a high potential risk of hazard
18、28 C.4 Example 3: Mains plugs, socket outlets and circuits .29 C.5 Example 4: Water temperature adjustment .29 Bibliography30 Figure A.1 Risk reduction General concept .20 Table 1 Requirements for avoiding inadvertent operations and possible ways to achieve them 19 Table A.1 Example of risk classifi
19、cation of accidents .21 Table A.2 Interpretation of risk classes 21 Table B.1 Safety requirements and risk reduction 22 4 14762 ISO/IEC:2009(E) INFORMATION TECHNOLOGY FUNCTIONAL SAFETY REQUIREMENTS FOR HOME AND BUILDING ELECTRONIC SYSTEMS (HBES) FOREWORD 1) ISO (International Organization for Standa
20、rdization) and IEC (International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards. Their preparation is entrusted to technical committees; any ISO and IEC
21、member body interested in the subject dealt with may participate in this preparatory work. International governmental and non-governmental organizations liaising with ISO and IEC also participate in this preparation. 2) In the field of information technology, ISO and IEC have established a joint tec
22、hnical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. 3) The formal decisions or agreemen
23、ts of IEC and ISO on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC and ISO member bodies. 4) IEC, ISO and ISO/IEC publications have the form of recommendations
24、 for international use and are accepted by IEC and ISO member bodies in that sense. While all reasonable efforts are made to ensure that the technical content of IEC, ISO and ISO/IEC publications is accurate, IEC or ISO cannot be held responsible for the way in which they are used or for any misinte
25、rpretation by any end user. 5) In order to promote international uniformity, IEC and ISO member bodies undertake to apply IEC, ISO and ISO/IEC publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any ISO/IEC publication and the
26、 corresponding national or regional publication should be clearly indicated in the latter. 6) ISO and IEC provide no marking procedure to indicate their approval and cannot be rendered responsible for any equipment declared to be in conformity with an ISO/IEC publication. 7) All users should ensure
27、that they have the latest edition of this publication. 8) No liability shall attach to IEC or ISO or its directors, employees, servants or agents including individual experts and members of their technical committees and IEC or ISO member bodies for any personal injury, property damage or other dama
28、ge of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication of, use of, or reliance upon, this ISO/IEC publication or any other IEC, ISO or ISO/IEC publications. 9) Attention is drawn to the normative references cited in th
29、is publication. Use of the referenced publications is indispensable for the correct application of this publication. 10) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO and IEC shall not be held responsible for i
30、dentifying any or all such patent rights. ISO/IEC 14762 has been prepared by subcommittee 25: Interconnection of information technology equipment, of ISO/IEC joint technical committee 1: Information technology. This International Standard cancels and replaces ISO/IEC TR 14762, published in 2001, and
31、 constitutes a technical revision. The main changes with respect to the Technical Report are the following: While the Technical Report lists reasons for harms and some possible counter measures this International Standard extends the list of hazards and specifies specific measures to counter them. T
32、his International Standard applies to all physical media, however, additional aspects of wireless and powerline features covered in ISO/IEC 24767 are not repeated. 14762 ISO/IEC:2009(E) 5 This standard has the status of a product family standard and may be used as a normative reference in a dedicate
33、d product standard for the safety of home and building electronic systems. It is not intended to be used as a stand-alone publication. This International Standard has been approved by vote of the member bodies, and the voting results may be obtained from the address given on the second title page. T
34、his publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 6 14762 ISO/IEC:2009(E) INTRODUCTION Home and Building Electronic System (HBES) products integrated in a HBES should be safe for the use in intended applications. This International Standard specifies the general fun
35、ctional safety requirements for HBES following the principles of the basic standard for functional safety, IEC 61508. This International Standard identifies functional safety issues related to products and their installation. The requirements are based on a risk analysis in accordance with IEC 61508
36、. The intention of this International Standard is to allocate, as far as possible, all safety requirements for HBES products in their life cycle. This International Standard only addresses HBES products. This International Standard is addressed to committees that develop or modify HBES product/syste
37、m standards, or, where no suitable HBES product standards addressing functional safety exist, to product manufacturers. HBES and HES products in this International Standard are for non-safety related applications. For related standards, see the IEC website. 14762 ISO/IEC:2009(E) 7 INFORMATION TECHNO
38、LOGY FUNCTIONAL SAFETY REQUIREMENTS FOR HOME AND BUILDING ELECTRONIC SYSTEMS (HBES) 1 Scope ISO/IEC 14762 sets the requirements for functional safety for Home and Building Electronic Systems (HBES) products and systems, a multi-application bus system where the functions are decentralised, distribute
39、d and linked through a common communication process. The requirements may also apply to the distributed functions of any equipment connected in a home or building control system if no specific functional safety standard exists for this equipment or system. The functional safety requirements of this
40、International Standard apply together with the relevant product standards for a device if any. This International Standard does not provide functional safety requirements for safety-related systems. 2 Normative references The following referenced documents are indispensable for the application of th
41、is document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. The provisions of the referenced specifications other than ISO/IEC, IEC, ISO and ITU documents, as identified in this clause, a
42、re valid within the context of this International Standard. The reference to such a specification within this International Standard does not give it any further status within ISO or IEC. In particular, it does not give the referenced specification the status of an International Standard. ISO/IEC 14
43、543-2-1, Information technology Home electronic systems (HES) architecture Part 2-1: Introduction and device modularity ISO/IEC Guide 51, Safety aspects Guidelines for their inclusion in standards IEC 61508 (all parts), Functional safety of electrical/electronic/programmable electronic safety-relate
44、d systems IEC 61508-1:1998, Functional safety of electrical/electronic/programmable electronic safety- related systems Part 1: General requirements IEC 61508-4:1998, Functional safety of electrical/electronic/programmable electronic safety- related systems Part 4: Definitions and abbreviations; incl
45、uding its corrigendum 1 from April 1999 IEC 61508-5:1998, Functional safety of electrical/electronic/programmable electronic safety- related systems Part 5: Examples of methods for the determination of safety integrity levels; including its corrigendum 1 from April 1999 IEC 61709:1996, Electronic co
46、mponents Reliability Reference conditions for failure rates and stress models for conversion ISO 9000 series, Quality management systems 8 14762 ISO/IEC:2009(E) EN 50090-2-2, Home and Building Electronic Systems (HBES) Part 2-2: System overview General technical requirements 3 Terms, definitions and
47、 abbreviations For the purposes of this document, the following terms and definitions apply. 3.1.1 architecture specific configuration of hardware and software elements in a system IEC 61508-4, definition 3.3.5 3.1.2 authentication means for certifying that the entity sending a message is what or wh
48、o it purports to be and confirmation that the message is identical to that which was sent 3.1.3 authorization mechanism to ensure that the entity or person accessing information, functions or services has the authority to do so 3.1.4 disturbed communication where for any reason a message being commu
49、nicated is incomplete, truncated, contains errors or has the correct format but delivers information which is outside the range of expected parameters for such a message 3.1.5 functional safety freedom from unacceptable risk of harm due to the operation of an HBES, including that resulting from a) normal operation, b) reasonably foreseeable misuse, c) failure, d) temporary disturbances NOTE 1 See definition 3.1.9 of IEC 61508-4. Part of the overall safety relating to the EUC (equipment under
