BS EN 60825-12-2004 Safety of laser products - Safety of free space optical communication systems used for transmission of information《激光产品的安全 用于信息传输的自由空间光通信系统的安全》.pdf

1、BRITISH STANDARD BS EN 60825-12:2004 Safety of laser products Part 12: Safety of free space optical communication systems used for transmission of information The European Standard EN 60825-12:2004 has the status of a British Standard ICS 31.260 BS EN 60825-12:2004 This British Standard was publishe

2、d under the authority of the Standards Policy and Strategy Committee on 19 May 2004 BSI 19 May 2004 ISBN 0 580 43791 4 National foreword This British Standard is the official English language version of EN 60825-12:2004. It is identical with IEC 60825-12:2004. The UK participation in its preparation

3、 was entrusted to Technical Committee EPL/76, Optical radiation safety and laser equipment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or Euro

4、pean publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include a

5、ll the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries

6、on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 33 and a back cover.

7、 The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60825-12 NORME EUROPENNE EUROPISCHE NORM April 2004 CENELEC European Committee for Electrotechnical Standardization Comit E

8、uropen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60825-12:2004 E ICS 31.260 E

9、nglish version Safety of laser products Part 12: Safety of free space optical communication systems used for transmission of information (IEC 60825-12:2004) Scurit des appareils laser Partie 12 : Scurit des systmes de communications optiques en espace libre utiliss pour la transmission dinformations

10、 (CEI 60825-12:2004) Sicherheit von Lasereinrichtungen Teil 12: Sicherheit von optischen Freiraumkommunikationssystemen fr die Informationsbertragung (IEC 60825-12:2004) This European Standard was approved by CENELEC on 2004-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Re

11、gulations 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.

12、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 mem

13、bers are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzer

14、land and United Kingdom. Foreword The text of document 76/281/FDIS, future edition 1 of IEC 60825-12, prepared by IEC TC 76, Optical radiation safety and laser equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60825-12 on 2004-04-01. The following dates were

15、 fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2005-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2007-04-01 This European Standard was prepare

16、d under a mandate given to CENELEC by the European Commission and the European Free Trade Association and supports the essential requirements of Directive 1999/5/EC. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60825-12:2004 was approved by CENE

17、LEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60812 NOTE Harmonized as HD 485 S1:1987 (not modified). IEC 61508 NOTE Harmonized in EN 61508 series (not modified). _ Page2 EN6082512

18、:2004 CONTENTS 1 Scope.4 2 Normative references.5 3 Terms and definitions .5 4 Requirements.8 4.1 General remarks8 4.2 Access level and classification requirements by location type10 4.3 Classification.16 4.4 Determination of access level18 4.5 Installation protection systems (IPS) .18 4.6 Specular

19、reflections.18 4.7 Organisational requirements18 Annex A (informative) Examples of applications and calculations22 Annex B (informative) Methods of hazard/safety analysis29 Annex C (informative) Guidance for installing, servicing and operating organisations.30 Annex ZA (normative) Normative referenc

20、s to internatioal publications with their corresponding European publications .32 Bibliography33 Figure 1 Commercial structures .10 Figure 2 Residential areas .10 Figure 3 Examples of external location types .11 Figure 4 Class 1M or 2M transmitter near edge of unrestricted rooftop.12 Figure 5 Class

21、1M transmitter in unrestricted location13 Figure 6 Class 3R transmitter in restricted location 15 Table 1 Restrictions for product classes and access levels 9 Table 2 Requirements for warning signs 21 Page3 EN6082512:2004 SAFETY OF LASER PRODUCTS Part 12: Safety of free space optical communication s

22、ystems used for transmission of information 1 Scope This part of IEC 60825 provides requirements and specific guidance for the manufacture and safe use of laser products and systems used for point-to-point or point-to-multipoint free space optical data transmission. This standard only addresses the

23、open beam portion of the system. If portions of the equipment or system incorporate optical fibre that extends from the confinements of the enclosure(s), the manufacturing and safety requirements under IEC 60825-1 apply to those portions only. This standard does not apply to systems designed for pur

24、poses of transmitting optical power for applications such as material processing or medical treatment. This standard also does not apply to the use of systems in explosive atmospheres. Throughout this part of IEC 60825, light-emitting diodes (LEDs) are included whenever the word “laser” is used. The

25、 objective of this part of IEC 60825 is to: provide information to protect people from potentially hazardous optical radiation produced by free space optical communication systems (FSOCS) by specifying engineering controls and requirements, administrative controls and work practices according to the

26、 degree of the hazard; specify requirements for manufacturing, installation, service and operating organisations in order to establish procedures and provide written information so that proper precautions can be adopted. Because of the nature of FSOCS, also known as optical wireless or free-air info

27、rmation transmission systems, care must be taken in their manufacture as well as their installation, operation, maintenance and service to assure the safe deployment and use of these systems. This standard places the responsibility for certain product safety requirements, as well as requirements for

28、 providing appropriate information on how to use these systems safely, on the manufacturer of the system and/or transmitters. It places the responsibility for the safe deployment and use of these systems on the installer and/or operating organisation. It places the responsibility for adherence to sa

29、fety instructions during installation and service operations on the installation and service organisations as appropriate, and during operation and maintenance functions on the operating organisation. It is recognised that the user of this standard may fall into one or more of the categories of manu

30、facturer, installer, service organisation and/or operating organisation as mentioned above. Any laser product is exempt from all further requirements of this part of IEC 60825 if classification by the manufacturer according to IEC 60825-1 shows that the emission level does not exceed the accessible

31、emission limit (AEL) of Class 1 under all conditions of operation, maintenance, service and failure, and it does not contain an embedded laser product. Page4 EN6082512:2004 2 Normative references The following referenced documents are indispensable for the application of this document. For dated ref

32、erences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60825-1:1993, Safety of laser products Part 1: Equipment classification, requirements and users guide 1 Amendment 1 (1997) Amendment 2 (2001) IEC 608

33、25-2, Safety of laser products Part 2: Safety of optical fibre communication systems 3 Terms and definitions 3.1 access level potential hazard at any accessible position associated with a free space optical communication system (FSOCS) installation NOTE 1 The access level is based on the level of op

34、tical radiation which could become accessible in reasonably foreseeable circumstances, e.g. walking into an open beam path. It is closely related to the laser classification procedure in IEC 60825-1. NOTE 2 Practically speaking, it takes two or more seconds to fully align an optical aid with a beam,

35、 (which might occur in an unrestricted location), and this delay is incorporated into the method for determining access level. 3.2 access level 1 level for which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits (AEL) of Class 1

36、for the applicable wavelengths and emission duration will not occur 3.3 access level 1M level for which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits (AEL) of Class 1M for the applicable wavelengths and emission duration will

37、 not occur NOTE If the applicable limit of access level 1M is larger than the limit of 3R and less than the limit of 3B, access level 1M is allocated. 3.4 access level 2 level for which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission

38、limits of Class 2 for the applicable wavelengths and emission duration will not occur 3.5 access level 2M level for which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits of Class 2M for the applicable wavelengths and emission d

39、uration will not occur NOTE If the applicable limit of access level 2M is larger than the limit of 3R and less than the limit of 3B, access level 2M is allocated. _ 1)A consolidated edition (1.2) exists comprising IEC 60825-1 (1993) and its Amendments 1 (1997) and 2 (2001). Page5 EN6082512:20043.6 a

40、ccess level 3R level for which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits of Class 3R for the applicable wavelengths and emission duration will not occur NOTE If the applicable limit of access level 1M or 2M is larger than

41、 the limit of 3R and less than the limit of 3B, access level 1M or 2M is allocated. 3.7 access level 3B level for which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits of Class 3B for the applicable wavelengths and emission dur

42、ation will not occur 3.8 access level 4 level for which, under reasonably foreseeable circumstances, it is possible that human access to laser radiation in excess of the accessible emission limits of Class 3B for the applicable wavelengths and emission duration could occur 3.9 automatic power reduct

43、ion (APR) feature of a transmitter of a FSOCS, provided by the system equipment manufacturer, by which the accessible power in the nominal hazard zone (NHZ) or NHZ-Aided is reduced to a specified value within a specified time, whenever there is an event which could result in human exposure to optica

44、l radiation above the maximum permissible exposure (MPE), e.g. by a person entering the NHZ or NHZ-Aided as applicable. In FSOCS, this feature may be used by the transmitter manufacturer to determine the classification 3.10 beacon optical source whose function is to aid in pointing or alignment of a

45、n optical system 3.11 embedded laser product See definition 3.29 in IEC 60825-1. 3.12 end-to-end system FSOCS that is comprised of at least one transmitter, one receiver, and any peripheral hardware necessary for the effective transfer of data along the transmission path from one position in space t

46、o another 3.13 free space optical communication system (FSOCS) installed, portable, or temporarily mounted, through-the-air system typically used, intended or promoted for voice, data or multimedia communications and/or control purposes via the use of modulated optical radiation produced by a laser

47、or LED. “Free space” means indoor and outdoor optical wireless applications with both non-directed and directed transmission. Emitting and detecting assemblies may or may not be separated NOTE Refer to the conditions within Clause 1 (Scope) by which Class 1 FSOCS products are exempt from all require

48、ments of this standard. 3.14 FSOCS transmitter; transmitter optical transmitter emitting radiation through the air and used in FSOCS Page6 EN6082512:2004 3.15 installation organisation; installer organisation or individual who is responsible for the installation of a FSOCS 3.16 installation protecti

49、on system (IPS) feature of an installation site, provided by the installer or operating organisation, that has two functions: (1) it detects human entry into the accessible volume of either the NHZ for restricted or controlled locations or the NHZ-Aided for an unrestricted location, and; (2) once such entry is detected, causes reduction of the accessible power of the laser to a specified level within a specified time 3.