BS EN 50491-5-1:2010 BSI Standards Publication General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) Part 5-1: EMC requirements, conditions and test set-up BRITISH STANDARD BS EN 50491-5-1:2010 National foreword This British Standard is the UK implementation of EN 50491-5-1:2010 Together with BS EN 50491-3:2010, BS EN 50491-5-2:2010 and BS EN 50491-5-3:2010, it partially supersedes BS EN 50090-2-2:1996+A2:2007 The UK participation in its preparation was entrusted to Technical Committee IST/6, Data communications A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © BSI 2010 ISBN 978 580 71963 ICS 97.120 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2010 Amendments issued since publication Amd No Date Text affected BS EN 50491-5-1:2010 EUROPEAN STANDARD EN 50491-5-1 NORME EUROPÉENNE April 2010 EUROPÄISCHE NORM ICS 97.120 Supersedes EN 50090-2-2:1996 (partially) + corr Mar.1997 (partially) + A1:2002 (partially) + A2:2007 (partially) English version General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) Part 5-1: EMC requirements, conditions and test set-up Exigences générales relatives aux systèmes électroniques pour les foyers domestiques et les bâtiments (HBES) et aux Systèmes de Gestion Technique du Bâtiment (SGTB) Partie 5-1: CEM Exigences générales, condition et montage d’essais Allgemeine Anforderungen an die Elektrische Systemtechnik für Heim und Gebäude (ESHG) und an Systeme der Gebäudeautomation (GA) Teil 5-1: EMV-Anforderungen, Bedingungen und Prüfungen This European Standard was approved by CENELEC on 2010-04-01 CENELEC 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 application to the Central Secretariat 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 Central Secretariat 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, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels © 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 50491-5-1:2010 E BS EN 50491-5-1:2010 EN 50491-5-1:2010 –2– Foreword This European Standard was prepared by a joint working group of CLC/TC 205, Home and Building Electronic Systems (HBES) and CEN/TC 247, Building Automation, Controls and Building Management (BACS) It was submitted to the formal vote and was accepted by CENELEC as EN 50491-5-1 on 2010-04-01 1) This document supersedes the relevant parts of EN 50090-2-2:1996 ; it is referenced by CEN/TC 247 and CLC/TC 205 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN and CENELEC shall not be held responsible for identifying any or all such patent rights The following dates are proposed: – – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement latest date by which the national standards conflicting with the EN have to be withdrawn (dop) 2011-04-01 (dow) 2013-04-01 As a result of the discussions at the CLC/TC 205 meeting on 2004-10-5/6 concerning the structuring of their standards in general parts and open system parts (see CLC/TC 205/Sec0413/INF) the following new parts of EN 50491 under the generic title “General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS)“ under the task of the JWG CEN/TC 247–CLC/TC 205 are proposed: Part Environmental conditions; Part Electrical safety requirements; Part 4-1 2) Functional safety requirements (for non safety related systems); Part 4-2 2) Functional safety requirements (for safety related systems); Part 5-1 EMC requirements, conditions and test set-up; Part 5-2 EMC requirements for HBES/BACS used in residential, commercial and light industry environment; Part 5-3 EMC requirements for HBES/BACS used in industry environment This draft European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directive EMC Directive 2004/108/EC See Annex ZZ ——————— 1) EN 50090-2-2:1996 + Corr Mar 1997 + A1:2002 + A2:2007, Home and Building Electronic Systems (HBES) – Part 2-2: System overview – General technical requirements 2) Under consideration –3– BS EN 50491-5-1:2010 EN 50491-5-1:2010 Contents Introduction .4 Scope .5 Normative references .5 Terms, definitions and abbreviations 3.1 Terms and definitions .6 3.2 Abbreviations General requirements .8 Performance criteria .9 5.1 General performance criteria 5.2 Performance criterion A 5.3 Performance criterion B 5.4 Performance criterion C Standard test conditions 10 6.1 General 10 6.2 Immunity .11 6.3 Emission .12 Annex A (informative) Additional information for fast transients (burst) test set up 13 Annex B (informative) Test set ups .14 B.1 General 14 B.2 Test set up for conducted immunity tests .14 B.3 Test set up for ESD 15 B.4 Test set up for conducted emission tests .15 B.5 Test set up for radiated (immunity and emission) tests 15 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives 16 Bibliography 17 Figures Figure – EUT ports Figure B.1 – Test set up for conducted immunity tests 14 Figure B.2 – Set up for radiated tests 15 Tables Table – Examples of product standards with an EMC part Table – Examples of stand alone EMC product standards BS EN 50491-5-1:2010 EN 50491-5-1:2010 –4– Introduction EN 50491 series deals with developing and testing Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) The expression HBES/BACS covers any combination of HBES and/or BACS products including their separate connected/detachable devices linked together via one or more networks Part of this series applies to HBES/BACS devices to ensure a common level of EMC requirements –5– BS EN 50491-5-1:2010 EN 50491-5-1:2010 Scope This product family standard sets the minimum level of EMC performance for HBES/BACS products intended to be connected to an HBES/BACS system A set of devices connected to perform a stand alone application is not considered to be an HBES/BACS system and therefore are outside the scope of this European Standard This European Standard provides the general performance requirements and test setups for EMC for all products connected to HBES/BACS This connection can be wired (e.g communication cable, power line) or wireless (e.g radiofrequency, infrared) This European Standard is applicable (but not limited) to – operator stations and other human system interface devices, – devices for management functions, – control devices, automation stations and application specific controllers, – field devices and their interfaces, – cabling and interconnection of devices, – dedicated devices for engineering and commissioning tools for HBES/BACS Normative references The following referenced documents are indispensable for the application 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 EN 50065 (series) Signalling on low-voltage electrical installations in the frequency range kHz to 148,5 kHz and 1,6 MHz to 30 MHz EN 50428 Switches for household and similar fixed electrical installations – Collateral standard – Switches and related accessories for use in home and building electronic systems (HBES) EN 50491-3:2009 General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) – Part 3: Electrical safety requirements EN 55022 Information technology equipment – Radio disturbance characteristics – Limits and methods of measurement (CISPR 22, mod.) EN 60669-2-1 Switches for household and similar fixed electrical installations – Part 2-1: Particular requirements – Electronic switches (IEC 60669-2-1, mod.) EN 60730 (series) Automatic electrical controls for household and similar use (IEC 60730 series, mod.) EN 61000-3-2 Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for harmonic current emissions (equipment input current ≤ 16 A per phase (IEC 61000-3-2) BS EN 50491-5-1:2010 EN 50491-5-1:2010 –6– EN 61000-3-3 Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current ≤ 16 A per phase and not subject to conditional connection (IEC 61000-3-3) EN 61000-4-2 Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement techniques – Electrostatic discharge immunity test (IEC 61000-4-2) EN 61000-4-3 Electromagnetic compatibility (EMC) – Part 4-3: Testing and measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test (IEC 61000-4-3) EN 61000-4-4 Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement techniques – Electrical fast transient/burst immunity test (IEC 61000-4-4) EN 61000-4-5 Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement techniques – Surge immunity test (IEC 61000-4-5) EN 61000-4-6 Electromagnetic compatibility (EMC) – Part 4-6: Testing and measurement techniques – Immunity to conducted disturbances, induced by radio-frequency fields (IEC 61000-4-6) EN 61000-4-8 Electromagnetic compatibility (EMC) – Part 4-8: Testing and measurement techniques – Power frequency magnetic field immunity test (IEC 61000-4-8) EN 61000-4-11 Electromagnetic compatibility (EMC) – Part 4-11: Testing and measurement techniques – Voltage dips, short interruptions and voltage variations immunity tests (IEC 61000-4-11) EN 62041 Power transformers, power supply units, reactors and similar products – EMC requirements (IEC 62041) ETSI EN 301 489 (series) Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services Terms, definitions and abbreviations 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in EN 50491-3:2009 and the following apply 3.1.1 HBES/BACS products HBES/BACS products are devices intended to be used for control, monitoring, operation or management of building services and/or home electronic systems which can interact via a communication network 3.1.2 port particular interface of the specified device with the external electromagnetic environment (see Figure 1) BS EN 50491-5-1:2010 EN 50491-5-1:2010 –7– Enclosure port AC power port I/O signal port EUT HBES network port DC power port PSU F D F D optional Figure – EUT ports 3.1.3 enclosure port physical boundary of the apparatus which electromagnetic fields may radiate through or impinge on 3.1.4 I/O signal port port at which a conductor or cable intended to carry auxiliary signals (excluding network signals according to Definition 3.1.5) is connected to the apparatus NOTE Examples are analogue inputs, outputs and control lines, etc 3.1.5 power port port at which a conductor or cable carrying the primary electrical power (a.c or d.c.) needed for the operation (functioning) of an apparatus or associated apparatus is connected to the apparatus 3.1.6 HBES/BACS network port port at which a conductor or cable intended to carry communication signals between the different devices of the HBES/BACS network is connected to the apparatus NOTE For test purposes, the HBES/BACS network port is equivalent to the telecommunications/network port according to EN 61000-6-3 3.2 Abbreviations For the purposes of this document, the following abbreviations apply AE Auxiliary Equipment BACS Building Automation and Control Systems CDN Coupling De-coupling Network CRT Cathode Ray Tube D Device needed for functional test of the EUT BS EN 50491-5-1:2010 EN 50491-5-1:2010 –8– EMC ElectroMagnetic Compatibility ESD ElectroStatic Discharge EUT Equipment Under Test F Filters decoupling the D from the test signal These filters may not reduce the test signal for the EUT HBES Home and Building Electronic Systems HCP Horizontal Coupling Plane ITU International Telecommunication Union PSU Power Supply Unit RF Radio-Frequency General requirements This European Standard applies in the following way: – if no applicable EMC product standard exists the test set-up, test levels and performance criteria of this series of standards apply; – if an applicable EMC product standard, that does not specify requirements for HBES applications, the test set-up, test levels and general performance criteria of this series of standards apply; the specific performance criteria of the product standard apply; – if a product standard specifies requirements for HBES, the test levels and general performance criteria of this series of standard shall adopt as the minimum level – Compliance to EN 50491 series shall only be claimed if the product standard refers to it Table – Examples of product standards with an EMC part Automatic electrical controls for household and similar use EN 60730 series Electronic switches and associated electronic extension units for household and similar fixed electrical installations EN 60669-2-1 Switches for household and similar fixed electrical installation – collateral standard – switches and related accessories for use in home and building electronic systems (HBES) EN 50428 Radiofrequency ETSI EN 301 489 series Signalling on low voltage electrical installations EN 50065 series Table – Examples of stand alone EMC product standards Power supply units EN 62041 –9– Performance criteria 5.1 General performance criteria BS EN 50491-5-1:2010 EN 50491-5-1:2010 During and after all tests, independent of the performance criteria, the device shall not block the transmission media or send unintended telegrams Intended telegrams are allowed to be corrupted by EMC phenomena A functional description and a definition of performance criteria, during or as a consequence of the EMC testing, shall be provided by the manufacturer and noted in the test report, based on the following criteria: – many devices operate using sophisticated protocol services which permit the recovery of data corrupted by interference or cause re-transmission of data in the event of corruption Transmission errors caused by the application of the tests in this European Standard and which are subsequently corrected by the protocol services are regarded as normal and the equipment is regarded as operating as intended in such circumstances; – changes in stored data, such as communication error logs, and which are not directly related to the intended function of the equipment shall be ignored, or recorded on request by the manufacturer – 5.2 Performance criterion A In addition to the general performance criteria 5.1, the device shall continue to operate according its product documentation as intended during and after the test No unintended change of state, stored data directly related to the intended function, unintended or loss of function is allowed 5.3 Performance criterion B In addition to the general performance criteria 5.1, the device shall continue to operate as intended after the test The measurement conditions shall be defined by the manufacturer During the test, degradation of performance is allowed as follows: – for analogue I/O signal ports, degradation up to 10 times the tolerance specified in product documentation, with a maximum value of 50 % of full scale, is allowed; – for digital I/O signal ports, no unexpected change of state or stored data related to the intended function is allowed; – for HBES/BACS network port, degradation of performance is allowed, but not total loss of communication 5.4 Performance criterion C In addition to the general performance criteria 5.1, malfunctions like change of state, change of data, loss of communication are permitted during the test, provided the function is self-recoverable after the test or the device restarts with predefined states and data Manual intervention after the test to restart the device is not allowed BS EN 50491-5-1:2010 EN 50491-5-1:2010 Standard test conditions 6.1 General – 10 – EMC tests are carried out on a single device (EUT) All tests shall be done with a minimum test configuration A minimum test configuration is a set of devices to exercise the fundamental functions of the EUT The minimum test configuration adopted for the EUT shall be recorded on the test report NOTE The minimum test configuration may be different for each test Precautions should be taken to prevent auxiliary devices from being disturbed by tests In addition: – Where a relevant European product Standard (EN) exists, which defines suitable operating condition(s) during EMC tests, the operating condition(s) of the EUT, during the test conditioning, shall be as defined in that Standard – Where no relevant European product Standard (EN) exists, the operating condition(s) of the EUT, during the test conditioning, shall include at least that (those) corresponding to the main functional mode (appropriate to the test being undertaken) of the system, which it forms part of NOTE The configuration and mode(s) of operation during the tests shall be precisely noted in the test report – The use of dedicated software for testing purposes is allowed, providing that all significant functions are exercised – All I/O signal and HBES/BACS network ports shall be tested, with cables attached If the EUT has more than five identical ports then at least 10 % of them, with a minimum of 5, shall be tested with cables attached NOTE “identical” means same hardware and software characteristics – Ports (e.g test and service ports) to which cables are normally not attached, need no cables attached and need not be tested – Cable types (e.g screened, unscreened, twisted pair) shall be those specified by the manufacturer If the manufacturer does not specify the cable types in product documentation, unshielded non twisted cables shall be used – Extensible cables (such as handset cable) shall not be intentionally stretched during the test For such cables, the reference length refers to unstretched conditions – In the case the device shall be installed in a specific case or cabinet according to manufacturer’s product documentation, then all tests on the EUT shall be carried out using such an enclosure – In the case the device can be installed in different kinds of cabinets available on the market, then tests shall be carried out on the EUT without the cabinet to allow repeatability – EUT, auxiliary equipment and cables shall be kept in fixed positions (e.g by means of mechanical constraints) during the test – A description of the test set up shall be contained in the test report – The cable type shall be referenced in the test report – 11 – 6.2 BS EN 50491-5-1:2010 EN 50491-5-1:2010 Immunity 6.2.1 Electrostatic discharge (ESD) This test shall be performed according to the test set-up and test procedures defined in EN 61000-4-2, taking into account the general standard test conditions defined in 6.1, by applying 10 positive and 10 negative discharges in the following manner: – contact discharge to the conductive surfaces and to coupling planes; – air discharge at insulating surfaces, if applicable Test points shall include hand commands (push buttons, keyboards etc.), display, touch screen, slits The static electricity discharges shall be applied only to such points and surfaces of the EUT which are accessible in normal use A clear identification of the tested points shall be included in the test report Wall mounted equipment shall be treated as table-top equipment In order to perform the test the wall side of the EUT is turned towards the HCP The cable length between the components of the minimum configuration should be m unless otherwise specified by the manufacturer 6.2.2 RF fields The test shall be performed according to EN 61000-4-3, taking into account the general standard test conditions defined in 6.1 Wall mounted equipment shall be treated as table-top equipment EUT with each side dimension below cm shall be tested on front face only with vertical and horizontal polarization Cables shall run either vertically or horizontally in the field uniform area, for at least m Connection with AE outside the chamber shall be released through a bypass filter with no effects on signal transmission 6.2.3 Fast transients (Bursts) This test shall be performed according to EN 61000-4-4, taking into account the general standard test conditions defined in 6.1 For tests with the EMC coupling clamp, multiconductor cables shall be tested as a single cable 6.2.4 Surge This test shall be performed according to EN 61000-4-5, taking into account the general standard test conditions defined in 6.1 Number of pulses: positive + negative at each of the following angles: 0°, 90°, 270° Time between pulses: or less For communication system with floating (not connected to ground) devices of small sizes it is important to consider the return path for the surge current to the test equipment BS EN 50491-5-1:2010 EN 50491-5-1:2010 – 12 – In order to specify a reproducible return path to ground an impedance Z (R = 50 Ω, C = 0, 47 µF) or that specified by the manufacture, shall be connected from ground to each wire of a communication cable For devices with only point-to-point communication (i.e only direct communication between two units) this impedance can be omitted during the test The impedance used shall be recorded in the test report 6.2.5 RF voltage This test shall be performed according to EN 61000-4-6, taking into account the general standard test conditions defined in 6.1 For tests with the EMC coupling clamp, multiconductor cables shall be tested as a single cable 6.2.6 Power frequency magnetic fields This test shall be performed according to EN 61000-4-8, taking into account the general standard test conditions defined in 6.1 6.2.7 Voltage dips and interruptions This test shall be performed according to EN 61000-4-11, taking into account the general standard test conditions defined in 6.1 The test shall be done both with a minimum configuration and a fully loaded EUT from the power supply point of view 6.3 Emission An attempt shall be made to maximize the emission consistent with the typical applications by varying the configuration of the test sample The EUT shall be tested after the thermal steady state condition is reached 6.3.1 Conducted emission This test shall be performed according to EN 55022, taking into account the general standard test conditions defined in 6.1 The EUT shall be tested after the thermal steady state condition is reached 6.3.2 Radiated emission This test shall be performed according to EN 55022, taking into account the general standard test conditions defined in 6.1 Cables shall run either vertically or horizontally for at least m Connection with AE outside the chamber shall be released through a bypass filter with no effects on signal transmission 6.3.3 Low frequency emission This test shall be performed according to EN 61000-3-2 and EN 61000-3-3, taking into account the general standard test conditions defined in 6.1 – 13 – BS EN 50491-5-1:2010 EN 50491-5-1:2010 Annex A (informative) Additional information for fast transients (burst) test set up For communication systems with floating devices of small sizes e.g sensors or push-buttons without connection to earth and supplied via the communication wires or by batteries is it important to consider the return path for the burst current to ground plane of the test equipment The basic standard EN 61000-4-4 specifies the EUT to be placed 10 cm over the ground plane However when mounting the device direct on a wall this capacity to ground can be increased because of the smaller coupling distance This can influence the immunity to the burst impact Therefore an additional test shall be done with the EUT placed directly on the ground plane In cases where the EUT has an accessible metal surface or shielding, the test shall be done with and without connecting this metal surface or shielding to earth BS EN 50491-5-1:2010 EN 50491-5-1:2010 – 14 – Annex B (informative) Test set ups B.1 General In this annex examples of test set ups for EMC tests are given Real test set ups should be created accordingly and described in the test report (see 6.1) These test set ups are based on twisted pair cabled systems To create test set ups for power line and wireless system, make reference to the relevant product standards B.2 Test set up for conducted immunity tests The following test set up is applicable to – fast transients/burst (EN 61000-4-4), – surge (EN 61000-4-5), – RF conducted disturbances (EN 61000-4-6) FILTER OR CDN (OPTIONAL) l6 l6 CABLE LENGTH >3m AE AE AE AE EUT 230V CDN l2 l3 l4 l1 l6: see relevant basic standard MINIMUM SYSTEM GROUND PLANE INSULATING SUPPORT l5 l6 230V FILTER OR CDN (OPTIONAL) GEN CDN EUT CABLE LENGTH > 3m Figure B.1 – Test set up for conducted immunity tests BS EN 50491-5-1:2010 EN 50491-5-1:2010 – 15 – The separation between the EUT and the rest of the system (minimum test configuration, according to 6.1) is normally obtained with a minimum cable length of m The cable may be twisted to save space To improve separation, a CDN or filter may be used, providing it will not affect the system communication If required, This device is connected as reported in Figure B.1, l4 being the total length of the cable and the device B.3 Test set up for ESD See EN 61000-4-2 B.4 Test set up for conducted emission tests See EN 55016-2 series B.5 Test set up for radiated (immunity and emission) tests The following test set up applies to radiated immunity test according to EN 61000-4-3 UNIFORM FIELD AREA l INSULATING SUPPORT EUT lm TURNTABLE Figure B.2 – Set up for radiated tests The EUT is fixed on an insulating support, placed at the centre of the uniform field area (reference volume for emission) At least m of cable is fixed in vertical position in proximity to the axis of the turntable The auxiliary part of the system is placed outside the chamber and connected through a filter When filtering is not possible (loss of communication), precautions may be taken to keep the shielding attenuation of the chamber when creating the connection with the outside The horizontal path of the cable is laid on the floor to minimise his influence on both immunity or emission The final path from the floor to the chamber outlet is kept as short as possible, vertical and close to the wall absorbers Precautions may be taken to prevent any movement of the cable when the EUT turns BS EN 50491-5-1:2010 EN 50491-5-1:2010 – 16 – Annex ZZ (informative) Coverage of Essential Requirements of EC Directives This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and within its scope the standard covers all relevant essential requirements as given in Article of Annex I of the EC Directive 2004/108/EC Compliance with this standard provides one means of conformity with the specified essential requirements of the Directive(s) concerned This standard applies with Part 5-2 EMC requirements for HBES/BACS used in residential, commercial and light industry environment; Part 5-3 EMC requirements for HBES/BACS used in industry environment WARNING: Other requirements and other EC Directives may be applicable to the products falling within the scope of this standard – 17 – BS EN 50491-5-1:2010 EN 50491-5-1:2010 Bibliography EN 55016 (series) Specification for radio disturbance and immunity measuring apparatus and methods (CISPR 16 series) This page deliberately left blank This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions Our British Standards and other publications are updated by amendment or revision The knowledge embodied in our standards has been carefully assembled in a dependable format and refined through our open consultation process Organizations of all sizes and across all sectors choose standards to help them achieve their goals Information on standards We can provide you with the knowledge that your organization needs to succeed Find out more about British Standards by visiting our website at bsigroup.com/standards or contacting our Customer Services team or Knowledge Centre Buying standards You can buy and download PDF versions of BSI publications, including British and adopted European and international standards, through our website at bsigroup.com/shop, where hard copies can also be purchased If you need international and foreign standards from other Standards Development Organizations, hard copies can be ordered from our Customer Services team Subscriptions Our range of subscription services are designed to make using standards easier for you For further information on our subscription products go to bsigroup.com/subscriptions With British Standards Online (BSOL) you’ll have instant access to over 55,000 British and adopted European and international standards from your desktop It’s available 24/7 and is refreshed daily so you’ll always be up to date You can keep in touch with standards developments and receive substantial discounts on the purchase price of standards, both in single copy and subscription format, by becoming a BSI Subscribing Member PLUS is an updating service exclusive to BSI Subscribing Members You will automatically receive the latest hard copy of your standards when they’re revised or replaced To find out more about becoming a BSI Subscribing Member and the benefits of membership, please visit bsigroup.com/shop With a Multi-User Network Licence (MUNL) you are able to host standards publications on your intranet Licences can cover as few or as many users as you wish With updates supplied as soon as they’re available, you can be sure your documentation is current For further information, email bsmusales@bsigroup.com BSI Group Headquarters 389 Chiswick High Road London W4 4AL UK We continually improve the quality of our products and services to benefit your business If you find an inaccuracy or ambiguity within a British Standard or other BSI publication please inform the Knowledge Centre Copyright All the data, software and documentation set out in all British Standards and other BSI publications are the property of and copyrighted by BSI, or some person or entity that owns copyright in the information used (such as the international standardization bodies) and has formally licensed such information to BSI for commercial publication and use Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI Details and advice can be obtained from the Copyright & Licensing Department Useful Contacts: Customer Services Tel: +44 845 086 9001 Email (orders): orders@bsigroup.com Email (enquiries): cservices@bsigroup.com Subscriptions Tel: +44 845 086 9001 Email: subscriptions@bsigroup.com Knowledge Centre Tel: +44 20 8996 7004 Email: knowledgecentre@bsigroup.com Copyright & Licensing Tel: +44 20 8996 7070 Email: copyright@bsigroup.com