Safety of machinery - Electro-sensitive protective equipment - Part 2: Particular requirements for equipment using active opto-electronic protective devices (AOPDs) (IEC 61496-2:2020)

This part of IEC 61496 specifies requirements for the design, construction and testing of
electro-sensitive protective equipment (ESPE) designed specifically to detect persons as part
of a safety-related system, employing active opto-electronic protective devices (AOPDs) for
the sensing function. Special attention is directed to features which ensure that an
appropriate safety-related performance is achieved. An ESPE can include optional safetyrelated
functions, the requirements for which are given in Annex A of IEC 61496-1:2020 and
of this document.
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.
Excluded from this document are AOPDs employing radiation at wavelengths outside the
range 400 nm to 1 500 nm.
This document can be relevant to applications other than those for the protection of persons,
for example, the protection of machinery or products from mechanical damage. In those
applications, additional requirements can be necessary, for example, when the materials that
are to be recognized by the sensing function have different properties from those of persons.
This document does not deal with electromagnetic compatibility (EMC) emission
requirements.

Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 2: Besondere Anforderungen an Einrichtungen, die aktive optoelektronische Schutzeinrichtungen (AOPD) verwenden (IEC 61496-2:2020)

Securité des machines - Equipements de protection électro-sensibles - Partie 2: Exigences particulières à un équipement utilisant des dispositif protecteurs optoélectroniques actifs (AOPD) (IEC 61496-2:2020)

L'IEC 61496-2:2020 définit les exigences de conception, de construction et d'essai d'équipements de protection électrosensibles (ESPE) conçus spécialement pour détecter des personnes, comme partie d'un système relatif à la sécurité, utilisant des dispositifs protecteurs optoélectroniques actifs (AOPD) pour la fonction de détection. Une attention particulière est portée sur les caractéristiques assurant qu'une performance relative à la sécurité appropriée est atteinte. Un ESPE peut comporter des fonctions de sécurité facultatives. Les exigences pour ces fonctions sont données à l'Annexe A de l'IEC 61496 1:2020 et du présent document. Le présent document ne spécifie ni les dimensions et configurations de la zone de détection, ni sa disposition par rapport aux parties dangereuses dans une application particulière, ni ce qui constitue un état dangereux pour toute machine donnée. Il se limite au fonctionnement de l'ESPE et à son interface avec la machine. Le présent document ne traite pas des AOPD qui utilisent des longueurs d'ondes hors de la plage de 400 nm à 1 500 nm. Le présent document peut être pertinent 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 complémentaires peuvent être nécessaires, par exemple lorsque les matériaux qui doivent être reconnus par le dispositif de détection ont des caractéristiques différentes de celles des personnes. Le présent document ne traite pas des exigences CEM (compatibilité électromagnétique) relatives aux émissions électromagnétiques. L'IEC 61496-2:2020 annule et remplace la troisième édition parue en 2013. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) Les exigences et procédures d’essai de la Partie 2 qui se sont révélées être communes à tous les ESPE ont été déplacées vers la Partie 1. Les procédures d’essai qui dépendent de la technologie de détection restent dans la Partie 2.

Varnost strojev - Električno občutljiva zaščitna oprema - 2. del: Posebne zahteve za opremo, ki uporablja aktivne optoelektronske zaščitne elemente (AOPD) (IEC 61496-2:2020)

General Information

Status
Published
Public Enquiry End Date
16-Jun-2019
Publication Date
09-Nov-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Oct-2020
Due Date
12-Dec-2020
Completion Date
10-Nov-2020

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SLOVENSKI STANDARD
SIST EN IEC 61496-2:2020
01-december-2020
Nadomešča:
SIST EN 61496-2:2014

Varnost strojev - Električno občutljiva zaščitna oprema - 2. del: Posebne zahteve

za opremo, ki uporablja aktivne optoelektronske zaščitne elemente (AOPD) (IEC
61496-2:2020)

Safety of machinery - Electro-sensitive protective equipment - Part 2: Particular

requirements for equipment using active opto-electronic protective devices (AOPDs)

(IEC 61496-2:2020)
Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 2:
Besondere Anforderungen an Einrichtungen, die aktive optoelektronische
Schutzeinrichtungen (AOPD) verwenden (IEC 61496-2:2020)
Securité des machines - Equipements de protection électro-sensibles - Partie 2:
Exigences particulières à un équipement utilisant des dispositif protecteurs
optoélectroniques actifs (AOPD) (IEC 61496-2:2020)
Ta slovenski standard je istoveten z: EN IEC 61496-2:2020
ICS:
13.110 Varnost strojev Safety of machinery
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
SIST EN IEC 61496-2:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61496-2:2020
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SIST EN IEC 61496-2:2020
EUROPEAN STANDARD EN IEC 61496-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2020
ICS 13.110; 29.260.99 Supersedes EN 61496-2:2013 and all of its amendments
and corrigenda (if any)
English Version
Safety of machinery - Electro-sensitive protective equipment -
Part 2: Particular requirements for equipment using active opto-
electronic protective devices (AOPDs)
(IEC 61496-2:2020)

Securité des machines - Equipements de protection électro- Sicherheit von Maschinen - Berührungslos wirkende

sensibles - Partie 2: Exigences particulières à un Schutzeinrichtungen - Teil 2: Besondere Anforderungen an

équipement utilisant des dispositif protecteurs Einrichtungen, die aktive optoelektronische

optoélectroniques actifs (AOPD) Schutzeinrichtungen (AOPD) verwenden
(IEC 61496-2:2020) (IEC 61496-2:2020)

This European Standard was approved by CENELEC on 2020-08-19. 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,

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

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61496-2:2020 E
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SIST EN IEC 61496-2:2020
EN IEC 61496-2:2020 (E)
European foreword

The text of document 44/875/FDIS, future edition 4 of IEC 61496-2, 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 61496-2:2020.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-05-19

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-08-19

document have to be withdrawn

This document supersedes EN 61496-2:2013 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.

Endorsement notice

The text of the International Standard IEC 61496-2:2020 was approved by CENELEC as a European

Standard without any modification.
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SIST EN IEC 61496-2:2020
EN IEC 61496-2:2020 (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.
Annex ZA of Part 1 is applicable except as follows:
Add the following references:
Publication Year Title EN/HD Year
IEC 60825-1 - Safety of laser products - Part 1: EN 60825-1 -
Equipment classification and requirements
IEC 61496-1 2020 Safety of machinery - Electro-sensitive EN IEC 61496-1 2020
protective equipment - Part 1: General
requirements and tests
IEC 62471 - Photobiological safety of lamps and lamp EN 62471 -
systems
ISO 13855 - Safety of machinery - Positioning of EN ISO 13855 -
safeguards with respect to the approach
speeds of parts of the human body
ISO 20471 - High-visibility clothing - Test methods and EN ISO 20471 -
requirements
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SIST EN IEC 61496-2:2020
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SIST EN IEC 61496-2:2020
IEC 61496-2
Edition 4.0 2020-07
INTERNATIONAL
STANDARD
colour
inside
Safety of machinery – Electro-sensitive protective equipment –
Part 2: Particular requirements for equipment using active opto-electronic
protective devices (AOPDs)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.110; 29.260.99 ISBN 978-2-8322-8452-0

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 7 ----------------------
SIST EN IEC 61496-2:2020
– 2 – IEC 61496-2:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 8

4 Functional, design and environmental requirements ........................................................ 9

5 Testing .......................................................................................................................... 14

6 Marking for identification and safe use ........................................................................... 40

7 Accompanying documents ............................................................................................. 41

Annex A (normative) Optional functions of the ESPE ........................................................... 42

Annex AA (informative) Type 2 AOPD periodic test configurations ....................................... 46

Figure 1 – Limit area for the protection against the risk of beam bypass ............................... 12

Figure 2 – Limit of vertical and horizontal misalignment ........................................................ 13

Figure 3 – Test piece at 45° .................................................................................................. 18

Figure 4 – Test piece at 90° .................................................................................................. 18

Figure 5 – Verifying sensing function by moving the test piece (TP) through the

detection zone near the emitter, near the receiver/retro-reflector target and at the

midpoint ................................................................................................................................ 19

Figure 6 – Limit values for the effective aperture angle (EAA) ............................................... 21

Figure 7 – Determination of the minimum detection capability ............................................... 22

Figure 8 – Measuring method for EAA (direction) .................................................................. 23

Figure 9 – Prism test to measure EAA of each beam ............................................................ 25

Figure 10 – EAA test using prism .......................................................................................... 26

Figure 11 – Example of optical subsystem ............................................................................ 27

Figure 12 – Example of SMD LED Model .............................................................................. 28

Figure 13 – Example of intensity distribution of emitting element .......................................... 28

Figure 14 – Example of emitter model with beams internally blocked by aperture stop .......... 29

Figure 15 – Example of receiving unit with off axis beam portion reflected internally on

mechanical elements ............................................................................................................ 29

Figure 16 – Example of test piece inside model of optical subsystem with passing

radiation on the receiver ....................................................................................................... 30

Figure 17 – Example of emitting unit adjusted at the limit ...................................................... 31

Figure 18 – Extraneous reflection test with mirror outside of limit area .................................. 32

Figure 19 – AOPD misalignment test .................................................................................... 34

Figure 20 – Light interference test – Direct method ............................................................... 36

Figure 21 – Light interference test – Test set-up with incandescent light source ................... 37

Figure 22 – Light interference test – Test set-up with fluorescent light source ....................... 38

Figure 23 – Light interference test – Test set-up with flashing beaconlight source ................ 39

Figure AA.1 – Single beam sensing device ........................................................................... 46

Figure AA.2 – Series connection of single beam sensing devices ......................................... 46

Figure AA.3 – Assembly of multiple beams tested individually............................................... 46

Figure AA.4 – Example of type 2 AOPD with internal test ...................................................... 47

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SIST EN IEC 61496-2:2020
IEC 61496-2:2020 © IEC 2020 – 3 –

Table 1 – Correspondences of requirements/testing and AOPD designs ............................... 15

Table 2 – Maximum permissible angle of misalignment (in degrees) for a type 2 ESPE

depending on the dimensions of the light curtain ................................................................... 32

Table 3 – Maximum permissible angle of misalignment (in degrees) for a type 3 ESPE

depending on the dimensions of the light curtain ................................................................... 33

Table 4 – Maximum permissible angle of misalignment (in degrees) for a type 4 ESPE

depending on the dimensions of the light curtain ................................................................... 33

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SIST EN IEC 61496-2:2020
– 4 – IEC 61496-2:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –
Part 2: Particular requirements for equipment using
active opto-electronic protective devices (AOPDs)
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 collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

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 61496-2 has been prepared by IEC technical committee 44: Safety

of machinery – Electrotechnical aspects, in collaboration with CENELEC technical committee

44X: Safety of machinery – Electrotechnical aspects.

This fourth edition cancels and replaces the third edition published in 2013. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) Requirements and test procedures in Part 2 that were found to be common to all ESPEs

have been moved to Part 1. Test procedures that are dependent on the sensing
technology remain in Part 2.
---------------------- Page: 10 ----------------------
SIST EN IEC 61496-2:2020
IEC 61496-2:2020 © IEC 2020 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
44/875/FDIS 44/878/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

This standard has the status of a product family standard and can be used as a normative

reference in a dedicated product standard for the safety of machinery.
This standard is to be used in conjunction with IEC 61496-1:2020.
This part supplements or modifies the corresponding clauses in IEC 61496-1:2020.

Where a particular clause or subclause of IEC 61496-1:2020 is not mentioned in this Part 2,

that clause or subclause applies as far as is reasonable. Where this part states "Addition",

"Modification" or "Replacement", the relevant text of IEC 61496-1:2020 is adapted

accordingly.

Clauses and subclauses which are additional to those of Part 1 are numbered sequentially,

following on the last available number in Part 1. Terminological entries (in Clause 3) which are

additional to those in Part 1 are numbered starting from 3.201. Additional annexes are

lettered from AA onwards.

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 document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document 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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SIST EN IEC 61496-2:2020
– 6 – IEC 61496-2:2020 © IEC 2020
INTRODUCTION

Electro-sensitive protective equipment (ESPE) is applied to machinery that presents 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 document provides 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 (AOPDs) 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 should be 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, ISO 12100.

Due to the complexity of the technology of ESPEs, 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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SIST EN IEC 61496-2:2020
IEC 61496-2:2020 © IEC 2020 – 7 –
SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –
Part 2: Particular requirements for equipment using
active opto-electronic protective devices (AOPDs)
1 Scope
This clause of Part 1 is replaced by the following:

This part of IEC 61496 specifies requirements for the design, construction and testing of

electro-sensitive protective equipment (ESPE) designed specifically to detect persons as part

of a safety-related system, employing active opto-electronic protective devices (AOPDs) for

the sensing function. Special attention is directed to features which ensure that an

appropriate safety-related performance is achieved. An ESPE can include optional safety-

related functions, the requirements for which are given in Annex A of IEC 61496-1:2020 and

of this document.

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.

Excluded from this document are AOPDs employing radiation at wavelengths outside the

range 400 nm to 1 500 nm.

This document can be relevant to applications other than those for the protection of persons,

for example, the protection of machinery or products from mechanical damage. In those

applications, additional requirements can be necessary, for example, when the materials that

are to be recognized by the sensing function have different properties from those of persons.

This document does not deal with electromagnetic compatibility (EMC) emission
requirements.
2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:

IEC 60825-1, Safety of laser products – Part 1: Equipment classification and requirements

IEC 61496-1:2020, Safety of machinery – Electro-sensitive protective equipment – Part 1:

General requirements and tests
IEC 62471, Photobiological safety of lamps and lamp systems

ISO 13855, Safety of machinery – Positioning of safeguards with respect to the approach

speeds of parts of the human body
ISO 20471, High-visibility clothing – Test methods and requirements
___________
To be published.
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SIST EN IEC 61496-2:2020
– 8 – IEC 61496-2:2020 © IEC 2020
3 Terms and definitions
This clause of Part 1 is applicable except as follows:
Addition:
3.201
active opto-electronic protective device
AOPD

device whose sensing function is performed by opto-electronic emitting and receiving

elements detecting the interruption of optical radiations generated, within the device, by an

opaque object present in the specified detection zone (or for a light beam device, on the axis

of the light beam)
Note 1 to entry: This note applies to the French language only.
3.202
beam centre-line

optical path joining the optical centre of an emitting element to the optical centre of the

corresponding receiving element that is intended to respond to light from that emitting

element during normal operation

Note 1 to entry: The optical axis of a light beam is not always on the beam centre-line.

Note 2 to entry: Physical displacement of the beam centre-line may occur as a consequence of normal operation

(for example, by the use of a motor-driven mirror).

Note 3 to entry: For an AOPD that operates on a retro-reflective technique, the optical path is defined by the

retro-reflector target together with the emitting and receiving elements.
3.203
effective aperture angle
EAA

maximum angle of deviation from the optical alignment of the emitting element(s) and the

receiving element(s) within which the AOPD continues in normal operation
3.204
light beam device

AOPD comprising one or more emitting element(s) and corresponding receiving element(s),

where a detection zone is not specified by the supplier
3.205
light curtain

AOPD comprising an integrated assembly of one or more emitting element(s) and one or more

receiving element(s) forming a detection zone with a detection capability specified by the

supplier

Note 1 to entry: A light curtain with a large detection capability is sometimes referred to as a light grid.

3.206
test piece
opaque cylindrical element used to verify the detection capability of the AOPD
3.207
geometrically restricted optical design
GROD
AOPD using an optic design where

– the effective aperture angle (EAA) of each emitting and each receiving element does not

exceed the values given in Figure 6 and
– the axes of the optical beams are parallel and
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SIST EN IEC 61496-2:2020
IEC 61496-2:2020 © IEC 2020 – 9 –
– side lobes are minimized and
– the spacing between beam centre-lines is uniform and

– the value of detection capability is based on the complete obscuration of at least one

beam for any and all positions of the test piece within the detection zone (see Figure 7).

Replacement:
3.3
detection capability
dimension representing the diameter of the test piece which:

– for a light curtain, will actuate the sensing device when placed in the detection zone;

– for a single light beam device, will actuate the sensing device when placed in the beam

centre-line;

– for a multiple light beam device, will actuate the sensing device when placed in any beam

centre-line

Note 1 to entry: The term "detection capability" can also be used to mean the ability to detect a test piece of the

specified diameter.
4 Functional, design and environmental requirements
This clause of Part 1 is applicable except as follows:
4.1 Functional requirements
4.1.2 Sensing function
Replacement:
4.1.2.1 General requirements

The sensing function shall be effective over the detection zone specified by the supplier. No

adjustment of the detection zone, detection capability or blanking function shall be possible

without the use of a key, keyword or tool.

The sensing device of a light curtain shall be actuated and the OSSD(s) shall go to and

remain in the OFF-state when a test piece in accordance with 4.2.13 is present anywhere

within the detection zone either static (at any angle) or moving (with the axis of the cylinder

normal to the plane of the detection zone), at any speed between 0 m/s and 1,6 m/s.

The sensing device of a light beam device shall be actuated and the OSSD(s) shall go to and

remain in the OFF-state when a test piece in accordance with 4.2.13 is present in the beam

centre-line, at any point throughout the operating distance, with the axis of the cylinder normal

to the axis of the beam.

Where the supplier states that an AOPD can be used to detect objects moving at speeds

greater than those specified above, the above requirements shall be met at any speed up to

and including the stated maximum speed(s).
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SIST EN IEC 61496-2:2020
– 10 – IEC 61496-2:2020 © IEC 2020

4.1.2.2 Additional requirements for AOPDs using retro-reflective techniques and for

AOPDs using mixed emitters and receivers in the same assembly
4.1.2.2.1 General

AOPDs using retro-reflective techniques where the light beam traverses the detection zone

more than once (over the same path) and AOPDs using mixed emitters and receivers in the

same assembly shall not fail to danger if a reflective object (for example, reflective clothes) is

placed at any position in the detection zone.

NOTE The use of mirrors to return the light beam is not considered to be a retro-reflective technique.

4.1.2.2.2 Sensing function

The OSSD(s) shall go to the OFF-state when a reflective object of a size equal to, or greater

than, the diameter and length of the test piece (see 4.2.13) is placed in the detection zone at

any position as specified in 5.2.1.4.

For a type 3 AOPD or a type 4 AOPD, under normal operating conditions, the OSSD(s) shall

go to the OFF-state when a reflective object, as specified in 5.2.1.4, is placed as close as

practicable in front of the sensing surface of the emitting/receiving elements.
4.1.3 Types of ESPE
Replacement:

In this document, only type 2, type 3 and type 4 ESPEs are considered. The types differ in

their performance in the presence of faults and under influences from environmental

conditions. In IEC 61496-1:2020, the effects of electrical and electromechanical faults are

considered (such faults are listed in Annex B of IEC 61496-1:2020).

NOTE The machine supplier and/or the user will determine which type is required for a particular application.

For a type 2 ESPE, in normal operation the output circuit of at least one output signal

switching device shall go to the OFF-state when the sensing function is actuated, or when

power is removed from the ESPE.
A type 2 ESPE shall fulfil the fault detection requirements of 4.2.2.3.
A type 3 ESPE shall fulfil the fault detection requirements of 4.2.2.4.
A type 4 ESPE shall fulfil the fault detectio
...

SLOVENSKI STANDARD
SIST EN 61496-2:2014/oprA1:2019
01-junij-2019

Varnost strojev - Električno občutljiva zaščitna oprema - 2. del: Posebne zahteve

za opremo, ki uporablja aktivne optoelektronske zaščitne elemente

Safety of machinery - Electro-sensitive protective equipment - Part 2: Particular

requirements for equipment using active opto-electronic protective devices (AOPDs)

Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 2:
Besondere Anforderungen an Einrichtungen, welche nach dem aktiven opto-
elektronischen Prinzip arbeiten
Securité des machines - Equipements de protection électro-sensibles - Partie 2:
Exigences particulières à un équipement utilisant des dispositif protecteurs
optoélectroniques actifs (AOPD)
Ta slovenski standard je istoveten z: EN 61496-2:2013/prA1:2019
ICS:
13.110 Varnost strojev Safety of machinery
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
SIST EN 61496-2:2014/oprA1:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61496-2:2014/oprA1:2019
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SIST EN 61496-2:2014/oprA1:2019
44/846/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61496-2/AMD1 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2019-03-29 2019-06-21
SUPERSEDES DOCUMENTS:
44/833/CD, 44/841A/CC
IEC TC 44 : SAFETY OF MACHINERY - ELECTROTECHNICAL ASPECTS
SECRETARIAT: SECRETARY:
United Kingdom Mrs Nyomee Hla-Shwe Tun
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING

Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.

Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.
TITLE:

Amendment 1 – Safety of machinery - Electro-sensitive protective equipment – Part 2: Particular

requirements for equipment using active opto-electronic protective devices (AOPDs)

PROPOSED STABILITY DATE: 2022
NOTE FROM TC/SC OFFICERS:
Please let me know if you need any further info. Many thanks.

Copyright © 2019 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this

electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.

You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without

permission in writing from IEC.
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SIST EN 61496-2:2014/oprA1:2019
– 2 – IEC CDV 61496-2:2013/
AMD1:2019 © IEC 2019
The reasons and objectives for amending IEC 61496
The main purpose for these amendments to IEC 61496-1 and -2 is as follows:

1) To clarify that Part one of this standard defines only general requirements for non-contact electro sensitive

protective equipment. Part one is intended to be used with a subsequent Part that defines particular

requirements based on the sensing technology used for detection.

2) It was discovered that some additional requirements for environmental influences were repeated in parts 2,

3, 4-2 and 4-3. It was decided that these requirements were common to all ESPEs and would be appropriate

to include in Part one.

3) Since this standard was written, several new generic standards have been developed that focus on specific

environmental influences that can affect functional safety (e.g. EMC, temperature, vibration). Part one has

been updated to harmonize with the requirements of the new generic standards, including adjusting

terminology and format of tables to match the new standards. It is not intended to change the actual

requirements.

4) In the original standard, some of the test procedures for environmental influences were unclear or

incomplete. These procedures have been expanded to provide detailed step by step procedures. Where

appropriate, references to procedures described in the generic test standards are provided.

5) There are Type 3 AOPDs on the market today. The requirements for Type 3 AOPDs are now included in Part

two.

6) Some of functional safety fault protection requirements were un-realistic and were generally not possible to

comply with. These requirements have been adjusted slightly.

7) Some small corrections and improvements were included throughout the document.

8) It is not intended that these amendments result in significant changes to the requirements. It is believed that

most ESPEs that comply with the existing standards will still be compliant with these reorganized

documents.
44-846-CDV.doc
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SIST EN 61496-2:2014/oprA1:2019
IEC CDV 61496-2:2013/ – 3 –
AMD1:2019 © IEC 2019
1 FOREWORD

2 This amendment has been prepared by IEC technical committee 44: Safety of machinery –

3 Electrotechnical aspects.
4 The text of this amendment is based on the following documents:
FDIS Report on voting
44/XX/FDIS 44/XX/RVD

6 Full information on the voting for the approval of this amendment can be found in the report

7 on voting indicated in the above table.

8 The committee has decided that the contents of this amendment and the base publication will

9 indicated on the IEC web site under
remain unchanged until the maintenance result date

10 "http://webstore.iec.ch" in the data related to the specific publication. At this date, the

11 publication will be
12 • reconfirmed,
13 • withdrawn,
14 • replaced by a revised edition, or
15 • amended.
16 ___________
———————

The National Committees are requested to note that for this publication the maintenance result date is 2011.

44-846-CDV.doc
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SIST EN 61496-2:2014/oprA1:2019
– 4 – IEC CDV 61496-2:2013/
AMD1:2019 © IEC 2019
19 2 Normative references

20 Note to reviewer: All dated references will be checked and updated before publication.

21 4.1.2.1 General requirements
22 Replace clause 4.1.2.1 with the following text:

23 The sensing function shall be effective over the detection zone specified by the supplier. No

24 adjustment of the detection zone, detection capability or blanking function shall be possible

25 without the use of a key, key-word or tool.

26 The sensing device of a light curtain shall be actuated and the OSSD(s) shall go to and

27 remain in the OFF-state when a test piece in accordance with 4.2.13 is present anywhere

28 within the detection zone either static (at any angle) or moving (with the axis of the cylinder

29 normal to the plane of the detection zone), at any speed between 0 m/s and 1,6 m/s.

30 The sensing device of a light beam device shall be actuated and the OSSD(s) shall go to and

31 remain in the OFF-state when a test piece in accordance with 4.2.13 is present in the beam

32 centre-line, at any point throughout the operating distance, with the axis of the cylinder normal

33 to the axis of the beam.

34 Where the supplier states that an AOPD can be used to detect objects moving at speeds

35 greater than those specified above, the above requirements shall be met at any speed up to

36 and including the stated maximum speed(s).
37 4.1.2.2.2 Sensing function
38 Replace the second paragraph with the following text:

39 For a type 3 AOPD or a type 4 AOPD, under normal operating conditions, the OSSD(s) shall

40 go to the OFF-state when a reflective object, as specified in 5.2.1.4 is placed as close as

41 practicable in front of the sensing surface of the emitting/receiving elements.

42 4.1.3 Types of ESPE
43 Replace entire clause 4.1.3 with the following text:
44 Replacement:

45 In this part of IEC 61496, only type 2, type 3 and type 4 ESPEs are considered. The types

46 differ in their performance in the presence of faults and under influences from environmental

47 conditions. In Part 1, the effects of electrical and electromechanical faults are considered

48 (such faults are listed in Annex B, Part 1).

49 NOTE The machine supplier and/or the user will determine which type is required for a particular application.

50 For a type 2 ESPE, in normal operation the output circuit of at least one output signal

51 switching device shall go to the OFF-state when the sensing function is actuated, or when

52 power is removed from the ESPE.
44-846-CDV.doc
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SIST EN 61496-2:2014/oprA1:2019
IEC CDV 61496-2:2013/ – 5 –
AMD1:2019 © IEC 2019
53 A type 3 ESPE shall fulfil the fault detection requirements of 4.2.2.4.
54 A type 4 ESPE shall fulfil the fault detection requirements of 4.2.2.5.

55 For a type 3 or a type 4 ESPE, in normal operation the output circuit of at least two output

56 signal switching devices shall go to the OFF-state when the sensing function is actuated, or

57 when power is removed from the ESPE.

58 When a single safety-related data interface is used to perform the functions of the OSSD(s),

59 then the data interface and associated safety-related communication interface shall meet the

60 requirements of 4.2.4.4 of IEC 61496-1:2012. In this case, a single safety-related data

61 interface can substitute for two OSSDs in a type 3 ESPE or a type 4 ESPE.
62 4.2.2.3 Particular requirements for a type 2 ESPE
63 Delete the last paragraph of clause 4.2.2.3.
64 4.2.2.4 Particular requirements for a type 3 ESPE
65 Delete the entire clause 4.2.2.4.
66 4.2.12 Integrity of the AOPD detection capability
67 In Clause 4.2.12, update the references in the second paragraph as follows:

68 If a single fault (as specified in Annex B), which under normal operating conditions (see

69 5.1.2.1 of IEC 61496-1:2012) would not result in a loss of AOPD detection capability but,

70 when occurring with a combination of the conditions specified above, would result in such a

71 loss, that fault together with that combination of conditions shall be considered as a single

72 fault, and the AOPD shall respond to
...

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