SIST EN IEC 61496-3:2025

Safety of machinery - Electro-sensitive protective equipment - Part 3: Particular requirements for active opto-electronic protective devices responsive to diffuse reflection (AOPDDR) (IEC 61496-3:2025)

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;

Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 3: Besondere Anforderungen an aktive optoelektronische diffuse Reflexion nutzende Schutzeinrichtungen (AOPDDR) (IEC 61496-3:2025)

Sécurité des machines - équipements de protection électrosensibles - Partie 3: Exigences particulières pour les équipements utilisant des dispositifs protecteurs optoélectroniques actifs sensibles aux réflexions diffuses (AOPDDR) (IEC 61496-3:2025)

L'IEC 61496-3:2025 spécifie des exigences supplémentaires pour la conception, la construction et les essais des équipements de protection électrosensibles (ESPE) sans contact, conçus spécifiquement pour détecter des personnes ou des parties de leurs corps, dans le cadre d'un système relatif à la sécurité, et qui utilisent des dispositifs protecteurs optoélectroniques actifs sensibles aux réflexions diffuses (AOPDDR) pour la fonction de détection. Une attention particulière est portée aux exigences qui permettent de s'assurer qu'une performance relative à la sécurité appropriée est atteinte. Un ESPE peut comporter des fonctions relatives à la sécurité facultatives; les exigences de ces fonctions sont spécifiées à l'Annexe A du présent document et à l'Annexe A de l'IEC 61496‑1:2020.
NOTE L'expression "sans contact" signifie qu'un contact physique n'est pas exigé pour la détection.
Le présent document ne spécifie pas les dimensions ou les configurations de la zone de détection, ni son emplacement par rapport aux parties dangereuses dans une application particulière, ne définit pas non plus ce qui constitue un état dangereux pour une machine donnée. Il se limite au fonctionnement de l'ESPE et à son interface avec la machine.
Les AOPDDR sont des dispositifs qui comportent soit
− une ou plusieurs zones de détection bidimensionnelles (AOPDDR bidimensionnel), soit
− une ou plusieurs zones de détection tridimensionnelles (AOPDDR tridimensionnel)
dans laquelle ou lesquelles le rayonnement dans le champ proche infrarouge est émis par un ou plusieurs émetteurs. Lorsque le rayonnement émis heurte un objet (par exemple, une personne ou une partie de son corps), une partie du rayonnement émis est réfléchi par réflexion diffuse sur un ou plusieurs récepteurs. Cette réflexion permet de déterminer la position de l'objet.
Les équipements optoélectroniques qui réalisent un seul mesurage de distances unidimensionnelles ponctuelles, par exemple les interrupteurs de proximité optiques, ne sont pas couverts par le présent document.
Le présent document se limite aux ESPE qui n'exigent pas d'intervention humaine pour la détection. Il se limite aux ESPE qui détectent les objets qui entrent ou sont présents dans une ou plusieurs zones de détection.
Le présent document ne traite pas des aspects exigés pour une classification complexe ou une différenciation de l'objet détecté.
Le présent document ne traite pas des exigences ni des essais pour une application extérieure.
Les AOPDDR qui utilisent des longueurs d'onde de crête de rayonnement en dehors de la plage de 820 nm à 1 100 nm ainsi que ceux dont les longueurs d'onde de rayonnement sont différentes de celles générées par l'AOPDDR lui-même sont exclus du présent document. Ce dernier peut servir de guide pour les dispositifs de détection qui utilisent des longueurs d'onde de rayonnement en dehors de cette plage. Le présent document est pertinent pour les AOPDDR dont la taille d'objet minimale détectable est comprise dans la plage entre 30 mm et 200 mm.
Le présent document peut être pertinent pour les applications autres que la protection des personnes, par exemple la protection des machines ou des produits contre des dommages mécaniques. Dans ces applications, des exigences différentes peuvent être appropriées, par exemple lorsque les matières qui sont reconnues par la fonction de détection possèdent des propriétés différentes de celles des personnes et de leurs vêtements.
Le présent document ne traite pas des ex

Varnost strojev - Električno občutljiva zaščitna oprema - 3. del: Posebne zahteve za aktivne optoelektronske zaščitne naprave, ki se odzivajo na difuzni odboj (AOPDDR) (IEC 61496-3:2025)

General Information

• Status: Published
• Public Enquiry End Date: 28-Feb-2024
• Publication Date: 13-Nov-2025
• ICS: 13.110 - Safety of machinery
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 15-Oct-2025
• Due Date: 20-Dec-2025
• Completion Date: 14-Nov-2025
• Ref Project: EN IEC 61496-3:2025 - Safety of machinery - Electro-sensitive protective equipment - Part 3: Particular requirements for active opto-electronic protective devices responsive to diffuse reflection (AOPDDR)

Relations

• Revises: SIST EN IEC 61496-3:2019 - Safety of machinery - Electro-sensitive protective equipment - Part 3: Particular requirements for Active Opto-electronic Protective Devices responsive to Diffuse Reflection (AOPDDR) (IEC 61496-3:2018)
• Effective Date: 21-Mar-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2025
Varnost strojev - Električno občutljiva zaščitna oprema - 3. del: Posebne zahteve
za aktivne optoelektronske zaščitne naprave, ki se odzivajo na difuzni odboj
(AOPDDR) (IEC 61496-3:2025)
Safety of machinery - Electro-sensitive protective equipment - Part 3: Particular
requirements for active opto-electronic protective devices responsive to diffuse reflection
(AOPDDR) (IEC 61496-3:2025)
Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 3:
Besondere Anforderungen an aktive optoelektronische diffuse Reflexion nutzende
Schutzeinrichtungen (AOPDDR) (IEC 61496-3:2025)
Sécurité des machines - équipements de protection électrosensibles - Partie 3:
Exigences particulières pour les équipements utilisant des dispositifs protecteurs
optoélectroniques actifs sensibles aux réflexions diffuses (AOPDDR) (IEC 61496-3:2025)
Ta slovenski standard je istoveten z: EN IEC 61496-3:2025
ICS:
13.110 Varnost strojev Safety of machinery
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61496-3

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2025
ICS 13.110; 31.260 Supersedes EN IEC 61496-3:2019
English Version
Safety of machinery - Electro-sensitive protective equipment -
Part 3: Particular requirements for active opto-electronic
protective devices responsive to diffuse reflection (AOPDDR)
(IEC 61496-3:2025)
Sécurité des machines - Équipements de protection Sicherheit von Maschinen - Berührungslos wirkende
électrosensibles - Partie 3: Exigences particulières pour les Schutzeinrichtungen - Teil 3: Besondere Anforderungen an
équipements utilisant des dispositifs protecteurs aktive optoelektronische diffuse Reflexion nutzende
optoélectroniques actifs sensibles aux réflexions diffuses Schutzeinrichtungen (AOPDDR)
(AOPDDR) (IEC 61496-3:2025)
(IEC 61496-3:2025)
This European Standard was approved by CENELEC on 2025-09-18. 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 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 CEN-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, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61496-3:2025 E

European foreword
The text of document 44/1061/FDIS, future edition 4 of IEC 61496-3, prepared by TC 44 "Safety of
machinery - Electrotechnical aspects" was submitted to the IEC-CENELEC parallel vote and approved
by CENELEC as EN IEC 61496-3:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-10-31
document have to be withdrawn
This document supersedes EN IEC 61496-3:2019 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document is read in conjunction with EN IEC 61496-1:2020.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61496-3:2025 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60068-2-64:2008 NOTE Approved as EN 60068-2-64:2008 (not modified)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Annex ZA of EN IEC 61496-1:2020, applies, except as follows:
Add:
Publication Year Title EN/HD Year
IEC 60068-2-14 2023 Environmental testing - Part 2-14: Tests - EN IEC 60068-2-14 2023
Test N: Change of temperature
IEC 60068-2-75 2014 Environmental testing - Part 2-75: Tests - EN 60068-2-75 2014
Test Eh: Hammer tests
IEC 60825-1 2014 Safety of laser products - Part 1: EN 60825-1 2014
Equipment classification and requirements
- - + A11 2021
- - + AC 2017-06
IEC 61496-1 2020 Safety of machinery - Electro-sensitive EN IEC 61496-1 2020
protective equipment - Part 1: General
requirements and tests
IEC 62471 (mod) 2006 Photobiological safety of lamps and lamp EN 62471 2008
systems
IEC/TS 62998-1 2019 Safety of machinery - Safety-related - -
sensors used for the protection of persons
IEC/TS 62998-3 2023 Safety of machinery - Safety-related - -
sensors used for the protection of persons
- Part 3: Sensor technologies and
algorithms
ISO 13855 2024 Safety of machinery - Positioning of EN ISO 13855 2024
safeguards with respect to the approach of
the human body
ISO 20471 2013 High visibility clothing - Test methods and EN ISO 20471 2013
requirements
IEC 61496-3 ®
Edition 4.0 2025-08
INTERNATIONAL
STANDARD
Safety of machinery - Electro-sensitive protective equipment -
Part 3: Particular requirements for active opto-electronic protective devices
responsive to diffuse reflection (AOPDDR)
ICS 13.110; 31.260 ISBN 978-2-8327-0593-3

IEC 61496-3:2025-08(en)
IEC 61496-3:2025 © IEC 2025
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions. 8
3.2 Abbreviated terms . 10
4 Functional, design and environmental requirements . 10
4.1 Functional requirements. 10
4.2 Design requirements . 11
4.3 Environmental requirements . 20
5 Testing . 24
5.1 General . 24
5.2 Functional tests . 25
5.3 Performance testing under fault conditions . 35
5.4 Environmental tests . 36
6 Marking for identification and for safe use . 54
6.1 General . 54
7 Accompanying documents . 54
Annex A (normative) Optional functions of the ESPE . 56
Annex B (normative) Catalogue of single faults affecting the electrical equipment of
the ESPE, to be applied as specified in 5.3 . 63
Annex AA (informative) Examples of the use of an AOPDDR in different applications . 64
AA.1 Positioning of AOPDDR-3D in respect of parts of the human body and
calculation of separation distances . 64
AA.1.1 General . 64
AA.1.2 Calculation of the overall separation distance S when reaching through
a vertical detection zone . 65
AA.1.3 AOPDDR-3D with a minimum detectable object size
40 mm < d ≤ 55 mm . 66
AA.1.4 AOPDDR-3D with a minimum detectable object size
55 mm < d ≤ 200 mm . 66
AA.1.5 Examples of detection zone and tolerance zone . 67
AA.1.6 Application examples for body detection of an AOPDDR-3D . 70
AA.2 Examples of the use of an AOPDDR . 72
AA.2.1 General . 72
AA.2.2 Limited distance . 72
AA.2.3 Overlap by the tolerance zone . 74
AA.2.4 Reference boundary monitoring . 75
AA.3 Detection zone angled to the direction of approach – Orthogonal approach . 76
AA.4 Example for the calculation of the response time of an AOPDDR-2D . 77
Annex BB (informative) Relationship between position accuracy and probability of
detection for a Type 3 AOPDDR . 78
Bibliography . 84

Figure 1 – Detection zone of an AOPDDR-2D . 15
IEC 61496-3:2025 © IEC 2025
Figure 2 – Detection zone of an AOPDDR-3D . 16
Figure 3 – Shape of test pieces for AOPDDR-3D . 18
Figure 4 – Minimum diffuse reflectivity of materials . 19
Figure 5 – Test piece intrusion into the detection zone for test . 26
Figure 6 – Influence on detection capability by incandescent light – Example 1 . 30
Figure 7 – Influence on detection capability by incandescent light – Example 2 . 31
Figure 8 – Influence on detection capability by light reflected by the background . 32
Figure 9 – Configuration for the endurance test – Example 1 . 33
Figure 10 – Configuration for the endurance test – Example 2 . 34
Figure 11 – Interference between two AOPDDR-3D of identical design (opposite
arrangement) . 44
Figure 12 – Interference between two AOPDDR-3D of identical design (parallel
arrangement) . 45
Figure 13 – Example of an emitting element of an AOPDDR . 47
Figure 14 – Example of a receiver of an AOPDDR . 47
Figure 15 – Influence on detection capability by background . 49
Figure 16 – Multi-path reflection test (top view) .
...