IEC 61496-3-ed.4.0

Detail information

Designation: IEC 61496-3-ed.4.0

Publication date: 14/08/2025

Pages: 89

Country: International technical standard

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Anotation

IEC 61496-3:2025 specifies additional requirements for the design, construction and testing of non-contact electro-sensitive protective equipment (ESPE) designed specifically to detect persons or parts of persons as part of a safety-related system, employing active opto-electronic protective devices responsive to diffuse reflection (AOPDDRs) for the sensing function. Special attention is directed to requirements which ensure that an appropriate safety-related performance is achieved. An ESPE can include optional safety-related functions, the requirements for which are given both in Annex A of this document and in Annex A of IEC 61496-1:2020. NOTE "Non-contact" means that physical contact is not required for sensing. This document does not specify the dimensions or configurations of the detection zone and its disposition in relation to hazardous parts for any particular application, nor what constitutes a hazardous state of any machine. It is restricted to the functioning of the ESPE and how it interfaces with the machine. AOPDDRs are devices that have either - one or more detection zone(s) specified in two dimensions (AOPDDR-2D), or - one or more detection zone(s) specified in three dimensions (AOPDDR-3D) wherein radiation in the near infrared range is emitted by an emitting element(s). When the emitted radiation impinges on an object (for example, a person or part of a person), a portion of the emitted radiation is reflected to a receiving element(s) by diffuse reflection. This reflection is used to determine the position of the object. Opto-electronic devices that perform only a single one-dimensional spot-like distance measure­ment, for example, optical proximity switches, are not covered by this document. This document is limited to ESPE that do not require human intervention for detection. It is limited to ESPE that detect objects entering into or being present in a detection zone(s). This document does not address those aspects required for complex classification or differentiation of the object detected. This document does not address requirements and tests for outdoor application. Excluded from this document are AOPDDRs employing radiation with the peak of wavelength outside the range 820 nm to 1 100 nm, and those employing radiation other than that generated by the AOPDDR itself. For sensing devices that employ radiation of wavelengths outside this range, this document can be used as a guide. This document is relevant for AOPDDRs having a minimum detectable object size in the range from 30 mm to 200 mm. This document can be relevant to applications other than those for the protection of persons, for example, for the protection of machinery or products from mechanical damage. In those applications, different requirements can be appropriate, for example when the materials that are recognized by the sensing function have different properties from those of persons and their clothing. This document does not deal with electromagnetic compatibility (EMC) emission requirements. This fourth edition cancels and replaces the third edition published in 2018. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) some requirement clauses and test procedures have been adapted or removed because they have been consolidated in IEC 61496-1:2020 (e.g. 5.4.6.2 Light sources and Clause A.9); b) change of the minimum probability of detection and fault detection requirements for Type 2 AOPDDR; c) using the AOPDDR as a trip device is described as an optional function in Clause A.13. LIEC 61496-3:2025 specifie des exigences supplementaires pour la conception, la construction et les essais des equipements de protection electrosensibles (ESPE) sans contact, concus specifiquement pour detecter des personnes ou des parties de leurs corps, dans le cadre dun systeme relatif a la securite, et qui utilisent des dispositifs protecteurs optoelectroniques actifs sensibles aux reflexions diffuses (AOPDDR) pour la fonction de detection. Une attention particuliere est portee aux exigences qui permettent de sassurer quune performance relative a la securite appropriee est atteinte. Un ESPE peut comporter des fonctions relatives a la securite facultatives; les exigences de ces fonctions sont specifiees a lAnnexe A du present document et a lAnnexe A de lIEC 61496-1:2020. NOTE Lexpression "sans contact" signifie quun contact physique nest pas exige pour la detection. Le present document ne specifie pas les dimensions ou les configurations de la zone de detection, ni son emplacement par rapport aux parties dangereuses dans une application particuliere, ne definit pas non plus ce qui constitue un etat dangereux pour une machine donnee. Il se limite au fonctionnement de lESPE et a son interface avec la machine. Les AOPDDR sont des dispositifs qui comportent soit - une ou plusieurs zones de detection bidimensionnelles (AOPDDR bidimensionnel), soit - une ou plusieurs zones de detection tridimensionnelles (AOPDDR tridimensionnel) dans laquelle ou lesquelles le rayonnement dans le champ proche infrarouge est emis par un ou plusieurs emetteurs. Lorsque le rayonnement emis heurte un objet (par exemple, une personne ou une partie de son corps), une partie du rayonnement emis est reflechi par reflexion diffuse sur un ou plusieurs recepteurs. Cette reflexion permet de determiner la position de lobjet. Les equipements optoelectroniques qui realisent un seul mesurage de distances unidimensionnelles ponctuelles, par exemple les interrupteurs de proximite optiques, ne sont pas couverts par le present document. Le present document se limite aux ESPE qui nexigent pas dintervention humaine pour la detection. Il se limite aux ESPE qui detectent les objets qui entrent ou sont presents dans une ou plusieurs zones de detection. Le present document ne traite pas des aspects exiges pour une classification complexe ou une differenciati