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)

This part of IEC 61496 specifies additional requirements for the design, construction and testing of non-contact electro-sensitive protective equipment (ESPE) designed specifically to detect 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 may include optional safety-related functions, the requirements for which are given both in Annex A of this part and in Annex A of IEC 61496-1. This part 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 a detection zone specified in two dimensions wherein radiation in the near infrared range is emitted by a transmitter 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 whereby the presence of the object can be detected. Excluded from this part are AOPDDRs employing radiation of wavelength outside the range 820 nm to 946 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 part may be used as a guide. This part is relevant for AOPDDRs having a stated detection capability in the range from 30 mm to 200 mm. AOPDDRs intended for use as trip device using wholebody detection with normal approach to the detection zone and having a stated detection capability not exceeding 200 mm shall meet the requirements of Clause A.12. AOPDDRs intended for a direction of approach normal to the detection zone and having a stated detection capability in the range from 30 mm to 70 mm shall meet the requirements of Clause A.13. This part may 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 may be necessary, 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 part does not deal with electromagnetic compatibility (EMC) emission requirements. Opto-electronic devices that perform only one-dimensional spot-like distance measurements, for example, proximity switches, are not covered by this part.

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

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)

Définit les prescriptions supplémentaires de conception, deconstruction et dessais déquipements de protection électro-sensibles (ESPE) pour la sécurité des machines, utilisant pour la fonction de détection des systèmes actifs optoélectroniques sensibles aux réflexions diffuses (AOPDDR).

Varnost strojev - Električno občutljiva zaščitna oprema - 3. del: Posebne zahteve za aktivne optoelektronske zaščitne elemente, ki se odzivajo na difuzni odboj (AOPDDR) (IEC 61496-3:2008)

General Information

• Status: Withdrawn
• Publication Date: 08-Dec-2008
• Withdrawal Date: 01-Dec-2021
• ICS: 13.110 - Safety of machinery
• ICS: 31.260 - Optoelectronics. Laser equipment
• Technical Committee: MOV - Measuring equipment for electromagnetic quantities
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 29-Nov-2021
• Due Date: 22-Dec-2021
• Completion Date: 02-Dec-2021
• Ref Project: CLC/TS 61496-3:2008 - Safety of machinery - Electro-sensitive protective equipment - Part 3: Particular requirements for Active Opto-electronic Protective Devices responsive to Diffuse Reflection (AOPDDR)

Relations

• Replaced By: SIST EN IEC 61496-3:2019 - Safety of machinery - Electro-sensitive protective equipment - Part 3: Particular requirements for Active Opto-electronic Protective Devices responsive to Diffuse Reflection (AOPDDR) (IEC 61496-3:2018)
• Effective Date: 19-Feb-2019
• Replaces: SIST-TS CLC/TS 61496-3:2005 - Safety of machinery - Electro-sensitive protective equipment -- Part 3: Particular requirements for Active Opto-electronic Protective Devices responsive to Diffuse Reflection (AOPDDR)
• Effective Date: 28-Jan-2023
• Replaces: SIST-TS CLC/TS 61496-3:2005 - Safety of machinery - Electro-sensitive protective equipment -- Part 3: Particular requirements for Active Opto-electronic Protective Devices responsive to Diffuse Reflection (AOPDDR)
• Effective Date: 13-May-2010

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TS CLC/TS 61496-3:2009
01-januar-2009
1DGRPHãþD
SIST-TS CLC/TS 61496-3:2005
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)
Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen -- Teil 3:
Besondere Anforderungen an aktive optoelektronische diffuse Reflektion nutzende
Schutzeinrichtungen (AOPDDR)
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)
Ta slovenski standard je istoveten z: CLC/TS 61496-3:2008
ICS:
13.110 Varnost strojev Safety of machinery
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
SIST-TS CLC/TS 61496-3:2009 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST-TS CLC/TS 61496-3:2009

---------------------- Page: 2 ----------------------

SIST-TS CLC/TS 61496-3:2009

TECHNICAL SPECIFICATION
CLC/TS 61496-3

SPÉCIFICATION TECHNIQUE
May 2008
TECHNISCHE SPEZIFIKATION

ICS 13.110; 31.260 Supersedes CLC/TS 61496-3:2003


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 61496-3:2008)


Sécurité des machines -  Sicherheit von Maschinen -
Equipements de protection Berührungslos wirkende
électro-sensibles - Schutzeinrichtungen -
Partie 3: Exigences particulières pour les Teil 3: Besondere Anforderungen an
équipements utilisant des dispositifs aktive optoelektronische diffuse Reflektion
protecteurs optoélectroniques actifs nutzende Schutzeinrichtungen (AOPDDR)
sensibles aux réflexions diffuses (IEC 61496-3:2008)
(AOPDDR)
(CEI 61496-3:2008)





This Technical Specification was approved by CENELEC on 2008-03-01.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to
make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting
national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.



CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 61496-3:2008 E

---------------------- Page: 3 ----------------------

SIST-TS CLC/TS 61496-3:2009
CLC/TS 61496-3:2008 - 2 -
Foreword
The text of document 44/572/FDIS, future edition 2 of IEC 61496-3, prepared by IEC TC 44, Safety of
machinery - Electrotechnical aspects, in collaboration with the Technical Committee CENELEC TC 44X,
Safety of machinery: electrotechnical aspects, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as CLC/TS 61496-3 on 2008-03-01.
This Technical Specification supersedes CLC/TS 61496-3:2003.
The most important changes and improvements compared to CLC/TS 61496-3:2003 are:
– extension of the range of detection capability covered by this part of the standard from 50 mm to
100 mm to the range of 30 mm to 200 mm;
– clarification of requirements for the selection of multiple detection zones (Clause A.10);
– more detailed information about the use of an AOPDDR as a whole body trip device by extension of
Clause A.12 and a new Clause A.13;
– improved description of the relationship between ranging accuracy and probability of detection
(Annex BB).
This Technical Specification is to be used in conjunction with EN 61496-1.
The following date was fixed:
– latest date by which the existence of the CLC/TS
has to be announced at national level (doa) 2008-06-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61496-3:2008 was approved by CENELEC as a Technical
Specification without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
ISO 14121-1 NOTE  Harmonized as EN ISO 14121-1:2007 (not modified).
__________
-

---------------------- Page: 4 ----------------------

SIST-TS CLC/TS 61496-3:2009
- 3 - CLC/TS 61496-3:2008

Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications


Addition to Annex ZA of EN 61496-1:
Publication Year Title EN/HD Year

- - High-visibility warning clothing for EN 471 2003
professional use - Test methods and
requirements


IEC 60068-2-14 1984 Environmental testing -

+ A1 1986 Part 2: Tests - Test N: Change of EN 60068-2-14 1999
temperature


IEC 60068-2-75 1997 Environmental testing - EN 60068-2-75 1997
Part 2-75: Tests - Test Eh: Hammer tests


1) 2)
IEC 60825-1 - Safety of laser products - EN 60825-1 2007
Part 1: Equipment classification and
requirements


IEC 61496-1 2004 Safety of machinery - Electro-sensitive EN 61496-1 2004
(mod) protective equipment -
Part 1: General requirements and tests


1) 2)
IEC/TS 62046 - Safety of machinery - Application of CLC/TS 62046 2008
protective equipment to detect the presence
of persons


ISO 13855 2002 Safety of machinery - Positioning of - -
protective equipment with respect to the
approach speeds of parts of the human body




1)
Undated reference.
2)
Valid edition at date of issue.

---------------------- Page: 5 ----------------------

SIST-TS CLC/TS 61496-3:2009

---------------------- Page: 6 ----------------------

SIST-TS CLC/TS 61496-3:2009
IEC 61496-3
Edition 2.0 2008-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


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 – Equipements 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
PRICE CODE
INTERNATIONALE
XB
CODE PRIX
ICS 13.110; 31.260 ISBN 2-8318-9588-X

---------------------- Page: 7 ----------------------

SIST-TS CLC/TS 61496-3:2009
– 2 – 61496-3 © IEC:2008
CONTENTS
FOREWORD.4
INTRODUCTION.6

1 Scope.7
2 Normative references.8
3 Terms and definitions .8
4 Requirements .9
4.1 Functional requirements .9
4.2 Design requirements.9
4.3 Environmental requirements .16
5 Testing .18
5.1 General .18
5.2 Functional tests .25
5.3 Performance testing under fault conditions.32
5.4 Environmental tests .32
6 Marking for identification and for safe use .46
6.1 General .46
7 Accompanying documents .46

Annex A (normative) Optional functions of the ESPE .48
Annex B (normative) Catalogue of single faults affecting the electrical equipment of the
ESPE, to be applied as specified in 5.3 .56
Annex AA (informative) Examples of the use of an AOPDDR in different applications.57
Annex BB (informative) Relationship between ranging accuracy and probability of
detection.61

Bibliography .69

Figure 1 – Detection zone of an AOPDDR – Example 1 .12
Figure 2 – Detection zone of an AOPDDR – Example 2 .13
Figure 3 – Minimum diffuse reflectivity of materials.15
Figure 4 – Influence on detection capability by incandescent light – Example 1 .19
Figure 5 – Influence on detection capability by incandescent light – Example 2 .20
Figure 6 – Influence on detection capability by light reflected by the background.21
Figure 7 – Influence on detection capability by stroboscopic light – Example 1 .22
Figure 8 – Influence on detection capability by stroboscopic light – Example 2 .23
Figure 9 – Light interference test .24
Figure 10 – Interference between two AOPDDRs of identical design .25
Figure 11 – Configuration for the endurance test – Example 1 .30
Figure 12 – Configuration for the endurance test – Example 2 .31
Figure 13a – Test of homogeneous pollution – Examples of different designs of
AOPDDR housings and optical windows without foil for simulation of homogeneous
pollution .42

---------------------- Page: 8 ----------------------

SIST-TS CLC/TS 61496-3:2009
61496-3 © IEC:2008 – 3 –
Figure 13b – Test of homogeneous pollution – Examples of different designs of
AOPDDR housings and optical windows – Examples of correct positions of the foil.43
Figure 13c – Test of homogeneous pollution – Examples of different designs of
AOPDDR housings and optical windows – Examples of incorrect positions of the foil .43
Figure 14 – Influence on detection capability by background .44
Figure A.1 – Use of an AOPDDR as a whole-body trip device – Example 1 .51
Figure A.2 – Use of an AOPDDR as a whole-body trip device – Example 2 .52
Figure A.3 – Use of an AOPDDR as parts of a body trip device – Example 1.54
Figure A.4 – Use of an AOPDDR as parts of a body trip device – Example 2.54
Figure AA.1 – Example of the use of an AOPDDR on machinery.58
Figure AA.2 – Example of the use of an AOPDDR on an AGV.59
Figure BB.1 – Relationship between ranging accuracy and detection zone .61
Figure BB.2 – Relationship between ranging accuracy, detection zone and the
probabilistic part of the tolerance zone – Example 1 .62
Figure BB.3 – Relationship between ranging accuracy, detection zone and the
probabilistic part of the tolerance zone – Example 2 .63
Figure BB.4 – Relationship between ranging accuracy, detection zone and tolerance
zone – Example 1 .64
Figure BB.5 – Relationship between ranging accuracy, detection zone and tolerance
zone – Example 2 .65
Figure BB.6 – Reference boundary monitoring – Distribution of measurement values –
Example 1.66
Figure BB.7 – Reference boundary monitoring – Distribution of measurement values –
Example 2.66
Figure BB.8 – POD of a single measurement (logarithmic) for a MooM-evaluation with 1
≤ M ≤ 50 .67
Figure BB.9 – POD of a single measurement for a MooM-evaluation with 1 ≤ M ≤ 50 in
relation to σ in the case of a normal distribution.68

Table 1 – Minimum tests required for the verification of detection capability
requirements (see also 4.2.12.1) .27
Table 2 – Overview of light interference tests .36

---------------------- Page: 9 ----------------------

SIST-TS CLC/TS 61496-3:2009
– 4 – 61496-3 © IEC:2008
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
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 61496-3 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 second edition cancels and replaces the first edition issued in 2001 and constitutes a
technical revision.
The most important changes and improvements compared to the first edition of this part of the
standard are:
– extension of the range of detection capability covered by this part of the standard from
50 mm to 100 mm to the range of 30 mm to 200 mm;
– clarification of requirements for the selection of multiple detection zones (Clause A.10);

---------------------- Page: 10 ----------------------

SIST-TS CLC/TS 61496-3:2009
61496-3 © IEC:2008 – 5 –
– more detailed information about the use of an AOPDDR as a whole body trip device by
extension of Clause A.12 and a new Clause A.13;
– improved description of the relationship between ranging accuracy and probability of
detection (Annex BB).
This International Standard is to be used in conjunction with IEC 61496-1.
The text of this standard is based on the following documents:
FDIS Report on voting
44/572/FDIS 44/578/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.
A list of all parts of IEC 61496 series, 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
maintenance result 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.
This standard has the status of a dedicated product standard and may be used as a normative
reference in a dedicated product standard for the safety of machinery.

---------------------- Page: 11 ----------------------

SIST-TS CLC/TS 61496-3:2009
– 6 – 61496-3 © IEC:2008
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 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.
Where a particular clause or subclause of part 1 is not mentioned in this part 3, that clause or
subclause applies as far as is reasonable. Where this part states "addition", "modification" or
"replacement", the relevant text of part 1 should be adapted accordingly.
Supplementary Annexes are entitled AA, BB, etc.
Each type of machine presents its own particular hazards, and it is not the purpose of this
standard 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/TR 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.

---------------------- Page: 12 ----------------------

SIST-TS CLC/TS 61496-3:2009
61496-3 © IEC:2008 – 7 –
SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –

Part 3: Particular requirements for Active Opto-electronic
Protective Devices responsive to
Diffuse Reflection (AOPDDR)



1 Scope
Replacement:
This part of IEC 61496 specifies additional requirements for the design, construction and
testing of non-contact electro-sensitive protective equipment (ESPE) designed specifically to
detect 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 may include optional safety-related functions, the requirements for which
are given both in Annex A of this part and in Annex A of IEC 61496-1.
This part 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 a detection zone specified in two dimensions wherein
radiation in the near infrared range is emitted by a transmitter 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 whereby the
presence of the object can be detected.
NOTE 1 Under certain circumstances, limitations of the sensor in relation to its use need to be considered. For
example:
– Objects that generate mirror-like (specular) reflections may not be detected if the diffuse reflectance value is
less than that specified for the "black" test piece.
– The determination of the minimal reflection factors for the detection of obstacles is based on the clothing of a
person. Objects having a reflectivity lower than that considered in this part may not be detected.
Excluded from this part are AOPDDRs employing radiation of wavelength outside the range
820 nm to 946 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 part
may be used as a guide. This part is relevant for AOPDDRs having a stated detection capability
in the range from 30 mm to 200 mm. AOPDDRs intended for use as trip device using whole-
body detection with normal approach to the detection zone and having a stated detection
capability not exceeding 200 mm shall meet the requirements of Clause A.12. AOPDDRs
intended for a direction of approach normal to the detection zone and having a stated detection
capability in the range from 30 mm to 70 mm shall meet the requirements of Clause A.13.
NOTE 2 According to ISO 13855 (EN 999), 6.3 foreseeable angles of approach greater than 30” should be
considered normal approach and foreseeable angles of approach less than 30” should be considered parallel
approach.
NOTE 3 According to ISO 13855 (EN 999), 6.2 when electro-sensitive protective equipment employing active opto-
electronic protective devices is used for direction of approach parallel to the detection zone the device should have
a detection capability in the range from 50 mm to 117 mm.

---------------------- Page: 13 ----------------------

SIST-TS CLC/TS 61496-3:2009
– 8 – 61496-3 © IEC:2008
This part may 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 may be necessary, 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 part does not deal with electromagnetic compatibility (EMC) emission requirements.
Opto-electronic devices that perform only one-dimensional spot-like distance measurements,
for example, proximity switches, are not covered by this part.
2 Normative references
Addition:
IEC 60068-2-14:1984, Basic environmental testing procedures – Part 2: Tests – Test N:
Change of temperature
Amendment 1 (1986)
IEC 60068-2-75:1997-08, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60825-1, Safety of laser products – Part 1: Equipment classification, requirements and
user’s guide
IEC 61496-1:2004, Safety of machinery – Electro-sensitive protective equipment – Part 1:
General requirements and tests
1
IEC 62046 , Safety of machinery – Application of protective equipment to detect the presence
of persons
ISO 13855:2002, Safety of machinery – Positioning of protective equipment with respect to the
approach speeds of parts of the human body
EN 471:2003-09, High-visibility warning clothing for professional use – Test methods and
requirements
3 Terms and definitions
Replacement:
3.4
detection zone
zone within which the specified test piece(s) (see 4.2.13) is detected by the AOPDDR with a
minimum required probability of detection (see 4.2.12.2)
NOTE A tolerance zone is necessary to achieve the required probability of detection of the specified test piece(s)
within the detection zone.
Addition:
———————
1
 To be published.

---------------------- Page: 14 ----------------------

SIST-TS CLC/TS 61496-3:2009
61496-3 © IEC:2008 – 9 –
3.301
active opto-electronic protective device responsive to diffuse reflection
AOPDDR
device, whose sensing function is performed by opto-electronic emitting and receiving
elements, that detects the diffuse reflection of optical radiations generated within the device by
an object present in a detection zone specified in two dimensions
3.302
AOPDDR detection capability
ability to detect the specified test pieces (see 4.2.13) in the detection zone
NOTE A list of influences which can affect the AOPDDR detection capability is given in 4.2.12.1.
3.303
tolerance zone
zone outside of and adjacent to the detection zone within which the specified test piece(s) (see
4.2.13) is detected with a probability of detection lower than the required probability within the
detection zone. The tolerance zone is necessary to achieve the required probability of detection
of the specified test piece(s) within the detection zone
NOTE For explanation of the concept of probability of detection and the tolerance zone see Annex BB.
4 Requirements
This clause of part 1 is applicable except as follows:
4.1 Functional requirements
4.1.3 Types of ESPE
Replacement:
In this part of IEC 61496 only a type 3 ESPE is considered. It is the responsibility of the
machine supplier and/or the user to prescribe if this type is suitable for a particular application.
The type 3 ESPE shall fulfil the fault detection requirements of 4.2.2.4 of this part. In normal
operation, the output circuit of each of at least two output signal switching devices (OSSDs) of
the type 3 ESPE shall go to the OFF-state when the sensing device is actuate
...