IEC IEC 60079-28 Edition 3.02025-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Explosiveatmospheres- Part 28: Protection of equipment and transmission systems using optical radiation Atmospheresexplosives- Partie 28: Protection du materielet des systemes de transmission utilisant le rayonnement optique IEC 60079-28:2025-11(en-fr) ICS29.260.20 ISBN 978-2-8327-0789-0 THISPUBLICATIONISCOPYRIGHTPROTECTED Copyright@2025IEC,Geneva,Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or IEC or IEC's memberNational Committee in the country of the requester. If youhave anyquestions about IEC copyright IEC member National Committee for further information. Droits de reproduction reserves. Sauf indication contraire, aucune partie de cette publication ne peut etre reproduite ni les microfilms, sans I'accord ecrit de I'lEC ou du Comite national de I'IEC du pays du demandeur. Si vous avez des questions sur le copyright de I'EC ou si vous désirez obtenir des droits supplementaires sur cette publication, utilisez les coordonnees ci-apres ou contactez le Comite national de I'lEC de votre pays de residence. IEC Secretariat Tel.: +41 22 919 02 11 3, rue de Varembe [email protected] CH-1211Geneva 20 www.iec.ch Switzerland About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. AboutIECpublications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigendum or an amendment might have been published. IEC publications search- IEC Products & Services Portal-products.iec.ch webstore.iec.ch/advsearchform Discover our powerful search engine and read freely all the The advanced search enables to find IEC publications by a publications previews, graphical symbols and the glossary. variety of criteria (reference number, text, technical With a subscription you will always have access to up to date committee, .)..It also gives information on projects. content tailored to your needs replaced and withdrawn publications Electropedia -www.electropedia.org IEC Just Published - webstore.iec.ch/justpublished The world's leading online dictionary on electrotechnology Stay up to date on all new IEC publications. Just Published containing more than 22 500 terminological entries in English details all new publications released. Available online and and French, with equivalent terms in 25 additional languages. once a month by email. Also known as the International Electrotechnical Vocabulary (IEV) online. IEc CustomerServiceCentre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: [email protected]. A propos de I'IEc La Commission Electrotechnique Internationale (lEC) est la premiere organisation mondiale qui elabore et publie des Normes internationales pour tout ce qui a trait a I'electricite, a I'électronique et aux technologies apparentees. A propos des publications IEC Le contenu technique des publications IEc est constamment revu. Veuillez vous assurer que vous possedez I'édition la plus recente, un corrigendum ou amendement peut avoir éte publié. IEC Products & Services Portal - products.iec.ch Recherche depublications IEC- webstore.iec.ch/advsearchform Decouvrez notre puissant moteur de recherche et consultez La recherche avancee permet de trouver des publications gratuitement tous les apercus des publications, symboles IEC en utilisant differents criteres (numero de reference, graphiques et le glossaire. Avec un abonnement, vous aurez texte, comite d'etudes, Elledonne aussi des toujours acces a un contenu a jour adapte a vos besoins. ..). informations sur les projets et les publications remplacees ou retirees. Electropedia-www.electropedia.org Le premier dictio