1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 50491-4-1:2012General requirements forHome and Building ElectronicSystems (HBES) and BuildingAutomation and ControlSystems (BACS) -Part 4-1: General functional safetyrequir
2、ements for products intended to beintegrated in Building Electronic Systems(HBES) and Building Automation andControl Systems (BACS)BS EN 50491-4-1:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN50491-4-1:2012. It supersedes BS EN 50090-2-3:2005 which iswith
3、drawn.The UK participation in its preparation was entrusted to TechnicalCommittee IST/6/-/12, Home Electronic Systems.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contrac
4、t. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 79075 1ICS 97.120Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority o
5、f theStandards Policy and Strategy Committee on 31 May 2012.Amendments issued since publicationDate Text affectedBS EN 50491-4-1:2012EUROPEAN STANDARD EN 50491-4-1 NORME EUROPENNE EUROPISCHE NORM March 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisatio
6、n Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50491-4-1:2012 E ICS 97.120 Supersedes EN 50090-2-3:20
7、05English version General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) - Part 4-1: General functional safety requirements for products intended to be integrated in Building Electronic Systems (HBES) and Building Automation and Contro
8、l Systems (BACS) Exigences gnrales relatives aux systmes lectroniques pour les foyers domestiques et les btiments (HBES) et aux Systmes de Gestion Technique du Btiment (SGTB) - Partie 4-1: Exigences gnrales de scurit fonctionnelle pour les produits destins tre intgrs dans les systmes HBES/SGTB Allge
9、meine Anforderungen an die Elektrische Systemtechnik fr Heim und Gebude (ESHG) und an Systeme der Gebudeautomation (GA) - Teil 4-1: Anforderungen an die funktionale Sicherheit fr Produkte, die fr den Einbau in ESHG / GA vorgesehen sind This European Standard was approved by CENELEC on 2012-02-20. CE
10、NELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on
11、 application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard 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 C
12、EN-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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li
13、thuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 50491-4-1:2012EN 50491-4-1:2012 2 Contents Foreword . 3Introduction . 41 Scope . 52 Normative references. 53 Terms and definitions. 54
14、General requirements 84.1 General 84.2 Method of establishment for the requirements 85 Requirements for functional safety 105.1 General 105.2 Power feeding . 105.3 Environment 115.4 Life time . 115.5 Reasonably foreseeable misuse . 115.6 Software and communication 125.7 Remote operations 13Annex A (
15、informative) Example of a method for the determination of safety integrity levels 15Annex B (informative) Hazards and development of necessary functional safety requirements 17Annex C (informative) Some examples of non safety related HBES /BACS applications 23Bibliography 25Figure Figure A.1 Risk re
16、duction - General concept 15Tables Table 1 Requirements for avoiding inadvertent operations and possible ways to achieve them . 14Table A.1 Example of risk classification of accidents . 16Table A.2 Interpretation of risk classes . 16Table B.1 . 17BS EN 50491-4-1:2012 3 EN 50491-4-1:2012 Foreword Thi
17、s document (EN 50491-4-1:2012) has been prepared by CLC/TC 205, “Home and Building Electronic Systems (HBES)“. The following dates are fixed: latest date by which this document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-02-20
18、 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2015-02-20 This document supersedes EN 50090-2-3:2005. EN 50491-4-1:2012 includes the following significant technical changes with respect to EN 50090-2-3:2005: - 3 Definitions - 5.6 Software and c
19、ommunication EN 50491-4-1 is part of the EN 50491 series, which comprises the following parts under the generic title General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS): - Part 1: General requirements - Part 2: Environmental condit
20、ions - Part 3: Electrical safety requirements - Part 4-1: General functional safety requirements for products intended to be integrated in Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) - Part 5-1: EMC requirements, conditions and test set-up - Part 5-2: EMC re
21、quirements for HBES/BACS used in residential, commercial and light industry environment - Part 5-3: EMC requirements for HBES/BACS used in industry environment - Part 6-1: HBES installations Installation and planning - Part 6-3 HBES installations Assessment and definition of levels Technical Report
22、Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. This standard covers the Principle Elements of the Safety Objectives for Electrical Eq
23、uipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC) BS EN 50491-4-1:2012EN 50491-4-1:2012 4 Introduction Homes buildings and similar environments require various electronic devices for several application. These devices when linked via a digital transmission network are called
24、Home and Building Electronic System (HBES) or Building Automation and Control System (BACS). Examples of HBES/BACS applications are the management, of lighting, heating, energy water, fire alarms, blinds, different forms of security, etc. A HBES/BACS network may be based on different communication m
25、edia as power line, twisted pair, coax cable, radio frequency or infrared and may be connected to external networks like telephone, broad band, television, power supply networks and alarm networks. Several standards of this series serve to implement public interest matters, primarily as reflected in
26、 European Commission Directives. HBES/BACS products integrated in a HBES/BACS should be safe for the use in intended applications. This European Standard specifies the general functional safety requirements for HBES/BACS following the principles of the basic standard for functional safety EN 61508.
27、This European Standard identifies functional safety issues related to products and their installation. The requirements are based on a risk analysis in accordance with EN 61508. The intention of this European Standard is to allocate, as far as possible, all safety requirements for HBES/BACS products
28、 in there life cycle. This European Standard only addresses HBES/BACS products. This European Standard is addressed to committees that develop or modify HBES /BACS product/system standards or, where no suitable HBES/BACS product standards addressing functional safety exist, to product manufacturers.
29、 HBES/BACS products in this European Standard are for non-safety related applications. Additional require-ments for safety related HBES/BACS according to EN 61508 will be defined in part 4-2 of the EN 50491 series. BS EN 50491-4-1:2012 5 EN 50491-4-1:2012 1 Scope This European Standard sets the requ
30、irements for functional safety for HBES/BACS products and systems,a multi-application bus system where the functions are decentralised, distributed and linked through a common communication process. The requirements may also apply to the distributed functions of any equipment connected in a home or
31、building control system if no specific functional safety standard exists for this equipment or system. The functional safety requirements of this European Standard apply together with the relevant product standard for the device if any. This European Standard is part of the EN 50491 series of standa
32、rds. This European Standard does not provide functional safety requirements for safety-related systems. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition c
33、ited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 50491-2 General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) Part 2: Environmental conditions EN 50491-3 Gener
34、al requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) Part 3: Electrical safety requirements EN 50491-5 (all parts) General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) EN
35、61508 (all parts) Functional safety of electrical/electronic/programmable electronic safety-related systems EN 61709:1998 Electronic components Reliability Reference conditions for failure rates and stress models for conversion (IEC 61709:1996) EN ISO 9000 Quality management systems Fundamentals and
36、 vocabulary (ISO 9000) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 architecture specific configuration of hardware and software elements in a system SOURCE: EN 61508-4:2010, definition 3.3.4 3.2 authentication means for certifying that th
37、e entity sending a message is what or who it purports to be and confirmation that the message is identical to that which was sent 3.3 authorisation mechanism to ensure that the entity or person accessing information, functions or services has the authority to do so BS EN 50491-4-1:2012EN 50491-4-1:2
38、012 6 3.4 disturbed communication communication in which for any reason a message being communicated 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 3.5 functional safety freedom from un
39、acceptable risk of harm due to the operation of an HBES/BACS, including that resulting from: 1) normal operation, 2) reasonably foreseeable misuse, 3) failure, 4) temporary disturbances Note 1 to entry: functional safety: part of the overall safety relating to the EUC and the EUC control system that
40、 depends on the correct functioning of the E/E/PE safety-related systems and other risk reduction measures SOURCE: EN 61508-4:2010, definition 3.1.12 Note 2 to entry: Definition of IEC/TR 61000-2-1 and IEC/TS 61000-1-2 (IEC/TC 77) are taken into account. 3.6 Hamming distance numbers of bits in which
41、 two binary codes differ 3.7 harm physical injury or damage to the health of people either directly or indirectly as a result of damage to property or to the environment Note 1 to entry: harm: physical injury or damage to the health of people or damage to property or the environment SOURCE: EN 61508
42、-4:2010, 3.1.1 3.8 hazard potential source of harm SOURCE: ISO/IEC Guide 51:1999, definition 3.5 SOURCE: EN 61508-4:2010, definition 3.1.2 Note 1 to entry: The term includes danger to persons arising within a short time scale (for example, fire and explosion) and also those that have a long-term eff
43、ect on a persons health (for example, release of a toxic substance). 3.9 hazardous event situation which results in harm on normal operation or abnormal condition Note 1 to entry: Whether or not a hazardous event results in harm depends on whether people, property or the environment are exposed to t
44、he consequence of the hazardous event and, in the case of harm to people, whether any such exposed people can escape the consequences of the event after it has occurred. Note 2 to entry: Adapted from EN 61508-4:2010,definition 3.1.4. 3.10 HBES/BACS Home and Building Electronic Systems multi-applicat
45、ion bus system where the functions are decentrally distributed and linked through a common communication process Note 1 to entry: HBES is used in homes and buildings plus their surroundings. Functions of the system are e.g: switching, open loop controlling, closed loop controlling, monitoring and su
46、pervising. 3.11 HBES/BACS product product consisting of devices in the form of hardware, firmware, their associated software and configuration tools, intended to be used in an HBES/BACS BS EN 50491-4-1:2012 7 3.12 product device in the form of hardware, firmware, their associated software and config
47、uration tools 3.13 product documentation manufacturers installation and operations literature as manufacturers catalogue, leaflet and other printed or electronic product information 3.14 safety related system des-ignated system that both implements the required safety functions necessary to achieve
48、or maintain a safe state for the EUC, and is intended to achieve, on its own or with other E/E/PE safety-related systems and other technology risk reduction measures, the necessary safety integrity for the required safety functions Note 1 to entry: The term refers to those systems, designated as saf
49、ety-related systems, that are intended to achieve, together with the other risk reduction measures, the necessary risk reduction in order to meet the required tolerable risk. Note 2 to entry: Safety-related systems are designed to prevent the EUC from going into a dangerous state by taking appropriate action on detection of a condition which may lead to a hazardous event. The failure of a safety-related system would
