IEC TS 61496-4-2:2014

Safety of machinery - Electro-sensitive protective equipment - Part 4-2: Particular requirements for equipment using vision based protective devices (VBPD) - Additional requirements when using reference pattern techniques (VBPDPP)

IEC TS 61496-4-2:2014 supplements or modifies the corresponding clauses in IEC 61496-1:2012 to specify particular requirements for the design, construction and testing of electro-sensitive protective equipment (ESPE) for the safeguarding of machinery, employing vision based protective devices (VBPD) using passive reference pattern techniques (VBPDPP) for the sensing function.
This publication is to be read in conjunction with IEC 61496-1:2012.

Securité des machines - Equipements de protection électro-sensibles - Partie 4-2: Exigences particulières pour les équipements utilisant des dispositifs protecteurs par vision (VBPD) - Exigences supplémentaires pour l'utilisation de techniques de motifs de référence (VBPDPP)

L'IEC TS 61496-4-2:2014 complète ou modifie les articles correspondants de l'IEC 61496-1:2012 afin de spécifier des exigences particulières concernant la conception, la fabrication et l'essai des équipements de protection électro-sensibles (ESPE) destinés à la protection des machines, utilisant pour la fonction de détection des dispositifs protecteurs par vision (VBPD - vision based protective device) qui appliquent des motifs de référence passifs (VBPDPP).
Cette publication doit être lue conjointement avec l'IEC 61496-1:2012.

General Information

• Status: Published
• Publication Date: 18-Jun-2014
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 13.110 - Safety of machinery
• ICS: 29.220.20 - Acid secondary cells and batteries
• ICS: 29.260.99 - Other electrical equipment for working in special conditions
• ICS: 43.040.10 - Electrical and electronic equipment
• Technical Committee: TC 44 - Safety of machinery - Electrotechnical aspects
• Drafting Committee: MT 61496-4 - TC 44/MT 61496-4
• Current Stage: DELPUB - Deleted Publication
• Start Date: 30-Nov-2018
• Completion Date: 16-Sep-2022

Relations

• Revised: IEC TS 61496-4-2:2022 - Safety of machinery - Electro-sensitive protective equipment - Part 4-2: Particular requirements for equipment using vision based protective devices (VBPD) - Additional requirements when using reference pattern techniques (VBPDPP)
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC TS 61496-4-2 ®
Edition 1.0 2014-06
TECHNICAL
SPECIFICATION
SPECIFICATION
TECHNIQUE
colour
inside
Safety of machinery – Electro-sensitive protective equipment –
Part 4-2: Particular requirements for equipment using vision based protective
devices (VBPD) – Additional requirements when using reference pattern
techniques (VBPDPP)
Sécurité des machines – Équipements de protection électro-sensibles –
Partie 4-2: Exigences particulières pour les équipements utilisant des dispositifs
protecteurs par vision (VBPD) – Exigences supplémentaires pour l'utilisation de
techniques de motifs de référence (VBPDPP)

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
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.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
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A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
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Application autonome pour consulter tous les renseignements
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bibliographiques sur les Normes internationales,
électriques. Il contient plus de 30 000 termes et définitions en
Spécifications techniques, Rapports techniques et autres
anglais et en français, ainsi que les termes équivalents dans
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
14 langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

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Glossaire IEC - std.iec.ch/glossary
Plus de 55 000 entrées terminologiques électrotechniques, en
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en utilisant différents critères (numéro de référence, texte, anglais et en français, extraites des articles Termes et
comité d’études,…). Elle donne aussi des informations sur les Définitions des publications IEC parues depuis 2002. Plus
projets et les publications remplacées ou retirées. certaines entrées antérieures extraites des publications des

CE 37, 77, 86 et CISPR de l'IEC.
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[e-mail].
IEC TS 61496-4-2 ®
Edition 1.0 2014-06
TECHNICAL
SPECIFICATION
SPECIFICATION
TECHNIQUE
colour
inside
Safety of machinery – Electro-sensitive protective equipment –

Part 4-2: Particular requirements for equipment using vision based protective

devices (VBPD) – Additional requirements when using reference pattern

techniques (VBPDPP)
Sécurité des machines – Équipements de protection électro-sensibles –

Partie 4-2: Exigences particulières pour les équipements utilisant des

dispositifs protecteurs par vision (VBPD) – Exigences supplémentaires pour

l'utilisation de techniques de motifs de référence (VBPDPP)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 13.110; 29.260.99 ISBN 978-2-8322-1568-5

– 2 – IEC TS 61496-4-2:2014 © IEC 2014

CONTENTS
FOREWORD . 4

INTRODUCTION . 6

1 Scope . 7

2 Normative references . 7

3 Terms and definitions . 8

4 Functional, design and environmental requirements . 10

4.1 Functional requirements . 10
4.2 Design requirements . 12
4.3 Environmental requirements . 17
5 Testing . 19
5.1 General . 19
5.2 Functional tests . 19
5.3 Performance testing under fault conditions . 22
5.4 Environmental tests . 23
6 Marking for identification and for safe use . 31
6.1 General . 31
7 Accompanying documents. 31
Annex A (normative) Optional functions of the ESPE . 33
A.9 Setting the detection zone and/or other safety-related parameters . 33
A.9.1 Functional requirements . 33
A.9.2 Verification . 33
A.10 Selection of multiple detection zones . 34
A.10.1 Functional requirements . 34
A.10.2 Verification . 34
A.11 Automatic setting of detection zones . 35
A.11.1 Functional requirements . 35
A.11.2 Verification . 35
Annex B (normative) Catalogue of single faults affecting the electrical equipment of the
ESPE, to be applied as specified in 5.3 . 36
B.7 Imaging sensor . 36
Annex AA (informative) The positioning of VBPD in respect of parts of the human body . 37

AA.1 Calculation of distances for electro-sensitive protective equipment employing
vision based protective devices (VBPD) . 37
AA.2 Calculation of the overall minimum distance S . 37
o
AA.3 Vision based protective devices with a detection capability > 40 mm and ≤ 55
mm . 38
AA.4 Vision based protective devices with a detection capability > 55 mm and ≤
200 mm. 39
AA.5 Examples of detection zone and tolerance zone . 39
Bibliography . 44

Figure 1 – Image planes in VBPDPP . 9
Figure 2 – Side view of VBPDPP using a passive reference pattern . 11
Figure 3 – Light intensity measurement setup for indirect light tests . 28
Figure 4 – Light intensity measurement setup for direct light tests . 29

Figure AA.1 – Minimum distance S – Example 1 . 40

Figure AA.2 – Overall minimum distance S without tolerance zone – Example 1 . 40
o
Figure AA.3 – Overall minimum distance S including tolerance zone – Example 1. 41
o
Figure AA.4 – Minimum distance S – Example 2 . 41

Figure AA.5 – Overall minimum distance S without tolerance zone – Example 2 . 42

o
Figure AA.6 – Overall minimum distance S including tolerance zone – Example 2. 43
o
Table 1 – Verification of detection capability requirements (see also 4.2.12) . 20

Table 2 – Overview of light interference tests . 24

– 4 – IEC TS 61496-4-2:2014 © IEC 2014

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –

Part 4-2: Particular requirements for

equipment using vision based protective devices (VBPD) –

Additional requirements when using reference
pattern techniques (VBPDPP)
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this p
...

IEC TS 61496-4-2 ®
Edition 1.0 2014-06
TECHNICAL
SPECIFICATION
SPECIFICATION
TECHNIQUE
colour
inside
Safety of machinery – Electro-sensitive protective equipment –
Part 4-2: Particular requirements for equipment using vision based protective
devices (VBPD) – Additional requirements when using reference pattern
techniques (VBPDPP)
Sécurité des machines – Équipements de protection électro-sensibles –
Partie 4-2: Exigences particulières pour les équipements utilisant des dispositifs
protecteurs par vision (VBPD) – Exigences supplémentaires pour l'utilisation de
techniques de motifs de référence (VBPDPP)

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
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.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 14
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 55 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,

77, 86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
plus récente, un corrigendum ou amendement peut avoir été publié.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient plus de 30 000 termes et définitions en
Spécifications techniques, Rapports techniques et autres
anglais et en français, ainsi que les termes équivalents dans
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
14 langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
Plus de 55 000 entrées terminologiques électrotechniques, en
La recherche avancée permet de trouver des publications IEC
en utilisant différents critères (numéro de référence, texte, anglais et en français, extraites des articles Termes et
comité d’études,…). Elle donne aussi des informations sur les Définitions des publications IEC parues depuis 2002. Plus
projets et les publications remplacées ou retirées. certaines entrées antérieures extraites des publications des

CE 37, 77, 86 et CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
[e-mail].
IEC TS 61496-4-2 ®
Edition 1.0 2014-06
TECHNICAL
SPECIFICATION
SPECIFICATION
TECHNIQUE
colour
inside
Safety of machinery – Electro-sensitive protective equipment –

Part 4-2: Particular requirements for equipment using vision based protective

devices (VBPD) – Additional requirements when using reference pattern

techniques (VBPDPP)
Sécurité des machines – Équipements de protection électro-sensibles –

Partie 4-2: Exigences particulières pour les équipements utilisant des

dispositifs protecteurs par vision (VBPD) – Exigences supplémentaires pour

l'utilisation de techniques de motifs de référence (VBPDPP)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 13.110; 29.260.99 ISBN 978-2-8322-1568-5

– 2 – IEC TS 61496-4-2:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Functional, design and environmental requirements . 10
4.1 Functional requirements . 10
4.2 Design requirements . 12
4.3 Environmental requirements . 17
5 Testing . 19
5.1 General . 19
5.2 Functional tests . 19
5.3 Performance testing under fault conditions . 22
5.4 Environmental tests . 23
6 Marking for identification and for safe use . 31
6.1 General . 31
7 Accompanying documents. 31
Annex A (normative) Optional functions of the ESPE . 33
A.9 Setting the detection zone and/or other safety-related parameters . 33
A.9.1 Functional requirements . 33
A.9.2 Verification . 33
A.10 Selection of multiple detection zones . 34
A.10.1 Functional requirements . 34
A.10.2 Verification . 34
A.11 Automatic setting of detection zones . 35
A.11.1 Functional requirements . 35
A.11.2 Verification . 35
Annex B (normative) Catalogue of single faults affecting the electrical equipment of the
ESPE, to be applied as specified in 5.3 . 36
B.7 Imaging sensor . 36
Annex AA (informative) The positioning of VBPD in respect of parts of the human body . 37
AA.1 Calculation of distances for electro-sensitive protective equipment employing
vision based protective devices (VBPD) . 37
AA.2 Calculation of the overall minimum distance S . 37
o
AA.3 Vision based protective devices with a detection capability > 40 mm and ≤ 55
mm . 38
AA.4 Vision based protective devices with a detection capability > 55 mm and ≤
200 mm. 39
AA.5 Examples of detection zone and tolerance zone . 39
Bibliography . 44

Figure 1 – Image planes in VBPDPP . 9
Figure 2 – Side view of VBPDPP using a passive reference pattern . 11
Figure 3 – Light intensity measurement setup for indirect light tests . 28
Figure 4 – Light intensity measurement setup for direct light tests . 29

Figure AA.1 – Minimum distance S – Example 1 . 40
Figure AA.2 – Overall minimum distance S without tolerance zone – Example 1 . 40
o
Figure AA.3 – Overall minimum distance S including tolerance zone – Example 1. 41
o
Figure AA.4 – Minimum distance S – Example 2 . 41
Figure AA.5 – Overall minimum distance S without tolerance zone – Example 2 . 42
o
Figure AA.6 – Overall minimum distance S including tolerance zone – Example 2. 43
o
Table 1 – Verification of detection capability requirements (see also 4.2.12) . 20
Table 2 – Overview of light interference tests . 24

– 4 – IEC TS 61496-4-2:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –

Part 4-2: Particular requirements for
equipment using vision based protective devices (VBPD) –
Additional requirements when using reference
pattern techniques (VBPDPP)
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC colla
...