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)

This part of IEC 61496 specifies additional requirements for the design, construction and
testing of electro-sensitive protective equipment (ESPE) designed specifically to detect
persons or parts of persons as part of a safety-related system, employing active optoelectronic
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 61496-1:2012.
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 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 950 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
have to be 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.

Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 3: Besondere Anforderungen an aktive optoelektronische diffuse Reflektion nutzende Schutzeinrichtungen (AOPDDR) (IEC 61496-3:2018)

Sécurité des machines - Equipements de protection électro-sensibles - Partie 3: Exigences particulières pour les équipements utilisant des dispositifs protecteurs optoélectroniques actifs sensibles aux réflexions diffuses (AOPDDR) (IEC 61496-3:2018)

IEC 61496-3:2018 est disponible sous forme de IEC 61496-3:2018 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L'IEC 61496-3:2018 définit les exigences complémentaires de conception, de construction et d'essai d'équipements de protection électrosensibles (ESPE) conçus spécialement pour détecter des personnes ou des parties de personnes, comme partie d'un système relatif à la sécurité, utilisant pour la fonction de détection des dispositifs protecteurs optoélectroniques actifs sensibles aux réflexions diffuses (AOPDDR). Une attention particulière est portée aux exigences assurant qu'une performance appropriée relative à la sécurité est atteinte. Un ESPE peut comprendre des fonctions relatives à la sécurité facultatives, leurs exigences étant indiquées dans l'Annexe A du présent document et dans l'Annexe A de l'IEC 61496-1:2012. L'IEC 61496-3:2018 ne définit ni les dimensions, ni la configuration de la zone de détection, ni son emplacement par rapport aux parties dangereuses dans une application quelconque, ni, enfin, ce qui constitue un état dangereux pour une machine donnée. Elle 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-2D), ou
– une ou plusieurs zones de détection tridimensionnelles (AOPDDR-3D)
dans laquelle ou lesquelles le rayonnement dans le champ proche infrarouge est émis par un ou des émetteurs. Lorsque le rayonnement émis rencontre un objet (une personne par exemple ou une partie de son corps), une partie du rayonnement émis est réfléchi par réflexion diffuse sur un ou des 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 détecteurs de proximité optiques, ne sont pas couverts par le présent document. L'IEC 61496-3:2018 ne traite pas des aspects exigés pour une classification complexe ou une différenciation de l'objet détecté. L'IEC 61496-3:2018 ne traite pas des exigences et des essais pour une application extérieure. Les AOPDDR utilisant des longueurs d'onde de crête de rayonnement hors de la plage de 820 nm à 950 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 hors de cette plage. L'IEC 61496-3:2018 est approprié pour les AOPDDR disposant d'une taille minimale de l’objet détectable dans la plage comprise entre 30 mm et 200 mm. L'IEC 61496-3:2018 peut se révéler approprié pour des 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 doivent être reconnues par la fonction de détection possèdent des propriétés différentes de celles des personnes et de leurs vêtements. L'IEC 61496-3:2018 ne traite pas des exigences d'émission concernant la compatibilité électromagnétique (CEM). L'IEC 61496-3:2018 annule et remplace la deuxième édition parue en 2008. Cette édition constitue une révision technique. L'IEC 61496-3:2018

Varnost strojev - Električno občutljiva zaščitna oprema - 3. del: Posebne zahteve za aktivne optoelektronske zaščitne elemente, ki se odzivajo na difuzni odboj (AOPDDR) (IEC 61496-3:2018)

Ta del standarda IEC 61496 navaja dodatne zahteve za načrtovanje, sestavo in preskušanje električno občutljive zaščitne opreme (ESPE), posebej zasnovane za zaznavanje oseb ali delov oseb kot del varnostnega sistema, ki za zaznavanje uporablja aktivne optoelektronske zaščitne elemente, ki se odzivajo na difuzni odboj (AOPDDR). Posebna pozornost je namenjena zahtevam, ki omogočajo ustrezno opravljanje varnostnih nalog. Električno občutljiva zaščitna oprema lahko vključuje izbirne funkcije, povezane z varnostjo, zahteve za katere so podane v dodatku A tega dokumenta in dodatku A standarda IEC 61496-1:2012.
Ta dokument ne navaja dimenzij ali oblike zaznavnega območja in njegove dispozicije v povezavi z nevarnimi deli za katero koli aplikacijo, niti ne opredeljuje, kaj je nevarno stanje za kateri koli stroj. Omejuje se na delovanje električno občutljive varovalne opreme in njene povezave s strojem.
Aktivni optoelektronski zaščitni elementi, ki se odzivajo na difuzni odboj, so naprave, ki imajo
– eno ali več zaznavnih območij, določenih v dveh dimenzijah (AOPDDR-2D), ali
– eno ali več zaznavnih območij, določenih v treh dimenzijah (AOPDDR-3D),
pri čemer sevanje v bližnjem infrardečem razponu oddajajo oddajni elementi. Kadar oddano sevanje negativno vpliva predmet (na primer osebo ali del osebe), se del oddanega sevanja odbije k sprejemnim elementom prek difuznega odboja. Ta odboj se uporablja za določanje položaja predmeta.
Optoelektronske naprave, ki izvajajo le eno enodimenzionalno točkovno merjenje razdalje, na primer optična približevalna stikala, v tem dokumentu niso pokrite. Ta dokument ne obravnava vidikov, zahtevanih za zapleteno razvrstitev ali razlikovanje zaznanega predmeta.
Ta dokument ne obravnava zahtev in preskusov za zunanjo uporabo.
Iz tega dokumenta so izvzeti aktivni optoelektronski zaščitni elementi, ki se odzivajo na difuzni odboj, pri katerih se uporablja sevanje z največjo valovno dolžino zunaj razpona med 820 in 950 nm, in tisti elementi, pri katerih se uporablja sevanje, drugačno od sevanja, ki ga ustvarjajo sami aktivni optoelektronski zaščitni elementi, ki se odzivajo na difuzni odboj. Za senzorje, pri katerih se uporablja sevanje z valovno dolžino, ki je zunaj tega razpona, se lahko ta dokument uporablja kot vodilo. Ta dokument je pomemben za aktivne optoelektronske zaščitne elemente, ki se odzivajo na difuzni odboj, z minimalno zaznavno velikosti predmeta v razponu med 30 in 200 mm.
Ta dokument se lahko uporablja tudi za primere rabe opreme, katere namen ni zaščita oseb, na primer za zaščito strojev ali izdelkov pred mehanskimi poškodbami. V teh primerih so morda primerne drugačne zahteve, npr. ko imajo materiali, ki jih morajo funkcije za zaznavanje prepoznati, drugačne lastnosti kot osebe in njihova obleka.
Ta dokument ne obravnava zahtev glede oddajanja motenj v zvezi z elektromagnetno združljivostjo (EMC).

General Information

• Status: Published
• Publication Date: 28-Mar-2019
• 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: 21-Feb-2019
• Due Date: 28-Apr-2019
• Completion Date: 29-Mar-2019
• Ref Project: 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)

Relations

• Replaces: SIST-TS CLC/TS 61496-3:2009 - Safety of machinery - Electro-sensitive protective equipment -- Part 3: Particular requirements for Active Opto-electronic Protective Devices responsive to Diffuse Reflection (AOPDDR)
• Effective Date: 19-Feb-2019

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61496-3:2019
01-junij-2019
1DGRPHãþD
SIST-TS CLC/TS 61496-3:2009
9DUQRVWVWURMHY(OHNWULþQRREþXWOMLYD]DãþLWQDRSUHPDGHO3RVHEQH]DKWHYH
]DDNWLYQHRSWRHOHNWURQVNH]DãþLWQHHOHPHQWHNLVHRG]LYDMRQDGLIX]QLRGERM
$23''5,(&
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)
Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 3:
Besondere Anforderungen an aktive optoelektronische diffuse Reflektion nutzende
Schutzeinrichtungen (AOPDDR) (IEC 61496-3:2018)
Sécurité des machines - Equipements de protection électro-sensibles - Partie 3:
Exigences particulières pour les équipements utilisant des dispositifs protecteurs
optoélectroniques actifs sensibles aux réflexions diffuses (AOPDDR) (IEC 61496-3:2018)
Ta slovenski standard je istoveten z: EN IEC 61496-3:2019
ICS:
13.110 Varnost strojev Safety of machinery
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
SIST EN IEC 61496-3:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61496-3:2019

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SIST EN IEC 61496-3:2019


EUROPEAN STANDARD EN IEC 61496-3

NORME EUROPÉENNE

EUROPÄISCHE NORM
February 2019
ICS 13.110; 31.260 Supersedes CLC/TS 61496-3:2008
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 61496-3:2018)
Sécurité des machines - Equipements de protection électro- Sicherheit von Maschinen - Berührungslos wirkende
sensibles - 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 61496-3:2018)
(IEC 61496-3:2018)
This European Standard was approved by CENELEC on 2019-01-11. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61496-3:2019 E

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SIST EN IEC 61496-3:2019
EN IEC 61496-3:2019 (E)
European foreword
The text of document 44/831/FDIS, future edition 3 of IEC 61496-3, prepared by IEC/TC 44 "Safety of
machinery - Electrotechnical aspects" was submitted to the IEC-CENELEC parallel vote and approved
by CENELEC as EN IEC 61496-3:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2019-10-11
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-01-11
document have to be withdrawn

This document supersedes CLC/TS 61496-3:2008.
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.

Endorsement notice
The text of the International Standard IEC 61496-3:2018 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
The bibliography of IEC 61496-1:2012 applies, except as follows:
Addition:
IEC 60068-2-64:2008 NOTE Harmonized as EN 60068-2-64:2008 (not modified)
IEC 60721-3-5:1997 NOTE Harmonized as EN 60721-3-5:1997 (not modified)
IEC 61508-1:2010 NOTE Harmonized as EN 61508-1:2010 (not modified)


2

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SIST EN IEC 61496-3:2019
EN IEC 61496-3:2019 (E)
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.cenelec.eu.
Clause 2 of IEC 61496-1:2012 applies, except as follows.
Addition:
Publication Year Title EN/HD Year
IEC 60068-2-14 -  Environmental testing - Part 2-14: Tests - EN 60068-2-14 -
Test N: Change of temperature
IEC 60068-2-75 -  Environmental testing - Part 2-75: Tests - EN 60068-2-75 -
Test Eh: Hammer tests
IEC TR 60721-4-5 -  Classification of environmental conditions - - -
Part 4-5: Guidance for the correlation and
transformation of environmental condition
classes of IEC 60721-3 to the
environmental tests of IEC 60068 - Ground
vehicle installations
IEC 60825-1 2014 Safety of laser products - Part 1: EN 60825-1 2014
Equipment classification and requirements
- -   EN 60825-1:2014/
AC:2017-06
IEC 61496-1 2012 Safety of machinery - Electro-sensitive EN 61496-1 2013
protective equipment - Part 1: General
requirements and tests
IEC 62471 -  Photobiological safety of lamps and lamp EN 62471 -
systems
ISO 13855 2010 Safety of machinery - Positioning of EN ISO 13855 2010
safeguards with respect to the approach
speeds of parts of the human body
ISO 20471 2013  High-visibility clothing - Test methods and EN ISO 20471 2013
requirements

3

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SIST EN IEC 61496-3:2019

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SIST EN IEC 61496-3:2019
IEC 61496-3
®

Edition 3.0 2018-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety of machinery – Electro-sensitive protective equipment –
Part 3: Particular requirements for active opto-electronic protective devices
responsive to diffuse reflection (AOPDDR)
Sécurité des machines – Équipements de protection électro-sensibles –
Partie 3: Exigences particulières pour les équipements utilisant des dispositifs
protecteurs optoélectroniques actifs sensibles aux réflexions diffuses
(AOPDDR)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.110; 31.260 ISBN 978-2-8322-6091-3
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® Registered trademark of the International Electrotechnical Commission
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SIST EN IEC 61496-3:2019
– 2 – IEC 61496-3:2018  IEC 2018
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
4 Functional, design and environmental requirements . 11
4.1 Functional requirements . 11
4.2 Design requirements . 12
4.3 Environmental requirements . 22
5 Testing . 25
5.1 General . 25
5.2 Functional tests . 26
5.3 Performance testing under fault conditions . 36
5.4 Environmental tests . 37
6 Marking for identification and for safe use . 56
6.1 General . 56
7 Accompanying documents . 57
Annex A (normative) Optional functions of the ESPE . 59
Annex B (normative) Catalogue of single faults affecting the electrical equipment of
the ESPE, to be applied as specified in 5.3 . 65
Annex AA (informative) Examples of the use of an AOPDDR in different applications . 66
AA.1 General . 66
AA.2 Example of the use of an AOPDDR-2D on machinery. 66
AA.3 Example of the use of an AOPDDR-2D on an automatic guided vehicle (AGV)
. 67
AA.4 Positioning of AOPDDR-3D in respect of parts of the human body . 69
AA.5 Examples of the use of an AOPDDR . 78
AA.6 Detection zone angled to the direction of approach – orthogonal approach . 81
AA.7 Example for the calculation of the response time of an AOPDDR-2D. 83
Annex BB (informative) Relationship between position accuracy and probability of
detection . 84
Bibliography . 90

Figure 1 – Detection zone of an AOPDDR-2D . 16
Figure 2 – Detection zone of an AOPDDR-3D . 17
Figure 3 – AOPDDR used as a trip device with orthogonal approach (200 mm minimum
detectable object size) . 18
Figure 4 – AOPDDR used as a trip device with orthogonal approach (150 mm minimum
detectable object size) . 19
Figure 5 – Minimum diffuse reflectivity of materials . 21
Figure 6 – Test piece intrusion into the detection zone for test . 27
Figure 7 – Influence on detection capability by incandescent light – Example 1 . 31
Figure 8 – Influence on detection capability by incandescent light – Example 2 . 32
Figure 9 – Influence on detection capability by light reflected by the background . 33

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SIST EN IEC 61496-3:2019
IEC 61496-3:2018  IEC 2018 – 3 –
Figure 10 – Configuration for the endurance test – Example 1 . 34
Figure 11 – Configuration for the endurance test – Example 2 . 35
Figure 12 – Interference between two AOPDDR-3D of identical design (opposite
arrangement) . 47
Figure 13 – Interference between two AOPDDR-3D of identical design (parallel

arrangement) . 48
Figure 14 – Example of an emitting element of an AOPDDR . 50
Figure 15 – Example of a receiver of an AOPDDR . 50
Figure 16 – Influence on detection capability by background . 52
Figure 17 – Multi-path reflection test (top view) . 53
Figure 18 – Multi-path reflection test (side view) . 53
Figure A.1 – Reference boundary monitoring – Distribution of measurement values . 62
Figure A.2 – Use of an AOPDDR with reference boundary monitoring . 63
Figure A.3 – Use of an AOPDDR as parts of a body trip device . 63
Figure AA.1 – Example of the use of an AOPDDR-2D on machinery . 66
Figure AA.2 – Example of the use of an AOPDDR-2D on an AGV . 68
Figure AA.3 – Minimum distance S – Example 1 . 71
Figure AA.4 – Overall minimum distance S without tolerance zone – Example 1 . 72
o
Figure AA.5 – Overall minimum distance S including tolerance zone – Example 1 . 73
o
Figure AA.6 – Minimum distance S – Example 2 . 74
Figure AA.7 – Overall minimum distance S without tolerance zone – Example 2 . 75
o
Figure AA.8 – Overall minimum distance S including tolerance zone – Example 2 . 75
o
Figure AA.9 – Application example for body detection of an AOPDDR-3D . 77
Figure AA.10 – Limited distance . 79
Figure AA.11 – Overlap. 80
Figure AA.12 – Reference boundary monitoring – Distribution of measurement values . 81
Figure AA.13 – AOPDDR-2D detection zone angled to the direction of approach –
Orthogonal approach . 82
Figure AA.14 – AOPDDR-3D detection zone angled to the direction of approach –
Orthogonal approach . 82
Figure BB.1 – Relationship between position accuracy and detection zone . 84
Figure BB.2 – Relationship between position accuracy, detection zone and the
probabilistic part of the tolerance zone – Example 1 . 85
Figure BB.3 – Relationship between position accuracy, detection zone and the
probabilistic part of the tolerance zone – Example 2 . 86
Figure BB.4 – Relationship between position accuracy, detection zone and tolerance
zone – Example 1 . 87
Figure BB.5 – Relationship between position accuracy, detection zone and tolerance
zone – Example 2 . 88
Figure BB.6 – POD of a single measurement (logarithmic) for a MooM-evaluation with
1 ≤ M ≤ 50 . 89
Figure BB.7 – POD of a single measurement for a MooM-evaluation with 1 ≤ M ≤ 50 in
relation to σ in the case of a normal distribution . 89

Table 1 – Minimum tests required for the verification of detection capability
requirements (see also 4.2.12.1) . 28

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SIST EN IEC 61496-3:2019
– 4 – IEC 61496-3:2018  IEC 2018
Table 2 – Overview of light interference tests. 41

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SIST EN IEC 61496-3:2019
IEC 61496-3:2018  IEC 2018 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –

Part 3: Particular requirements for active opto-electronic protective
devices responsive to diffuse reflection (AOPDDR)

FOREWORD
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9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61496-3 has been prepared by IEC technical committee 44: Safety
of machinery – Electrotechnical aspects.
This third edition cancels and replaces the second edition published in 2008. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) extension of the scope from AOPDDR-2D to AOPDDR-3D;
b) extension of the scope from Type 3 ESPE to Type 2 ESPE;
c) implementation of requirements and test procedures for AOPDDR-3D and Type 2 ESPE;
d) listing of reference boundary monitoring as an optional function of the ESPE;

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e) implementation of instructions for positioning of AOPDDR-3D in respect of parts of the
human body;
f) revised requirement for combinations of single faults with conditions for no failure to
danger, see for example 4.2.2.4, last paragraph.
The text of this standard is based on the following documents:
FDIS Report on voting
44/831/FDIS 44/837/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This document is to be used in conjunction with IEC 61496-1:2012.
Where a particular clause or subclause of IEC 61496-1:2012 is not mentioned in this
document, that clause or subclause applies as far as is reasonable. Where this document
states "addition" or "replacement", the relevant text of IEC 61496-1:2012 is adapted
accordingly. Clauses and subclauses which are additional to those of IEC 61496-1:2012 are
numbered sequentially, following on the last available number in IEC 61496-1:2012. Where no
available number exist, the additional subclauses are numbered starting from 101.
Supplementary Annexes are entitled AA and BB.
A list of all parts in the IEC 61496 series, published under the general title Safety of
machinery – Electro-sensitive protective equipment, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.

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INTRODUCTION
An electro-sensitive protective equipment (ESPE) is applied to machinery presenting a risk of
personal injury. It provides protection by causing the machine to revert to a safe condition
before a person can be placed in a hazardous situation.
This part of IEC 61496 supplements or modifies the corresponding clauses in IEC 61496-1 to
specify particular requirements for the design, construction and testing of electro-sensitive
protective equipment (ESPE) for the safeguarding of machinery, employing active opto-
electronic protective devices responsive to diffuse reflection (AOPDDRs) for the sensing
function.
Each type of machine presents its own particular hazards, and it is not the purpose of this
document to recommend the manner of application of the ESPE to any particular machine.
The application of the ESPE is a matter for agreement between the equipment supplier, the
machine user and the enforcing authority. In this context, attention is drawn to the relevant
guidance established internationally, for example, IEC 62046 and ISO 12100.
Due to the complexity of the technology, there are many issues that are highly dependent on
analysis and expertise in specific test and measurement techniques. In order to provide a high
level of confidence, independent review by relevant expertise is recommended.

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SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –

Part 3: Particular requirements for active opto-electronic protective
devices responsive to diffuse reflection (AOPDDR)



1 Scope
This part of IEC 61496 specifies additional requirements for the design, construction and
testing of 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 61496-1:2012.
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 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 950 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
have to be 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.

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2 Normative references
Clause 2 of IEC
...