Safety of machinery - Electro-sensitive protective equipment - Part 1: General requirements and tests (IEC 61496-1:2020)

This part of IEC 61496 specifies general requirements for the design, construction and testing
of non-contact electro-sensitive protective equipment (ESPE) designed specifically to detect
persons or part of a person as part of a safety-related system. Special attention is directed to
functional and design requirements that ensure an appropriate safety-related performance is
achieved. An ESPE can include optional safety-related functions, the requirements for which
are given in Annex A.
NOTE "Non-contact" means that physical contact is not required for sensing.
This document is intended to be used with a subsequent part of IEC 61496 that provides
particular requirements based on the sensing technology.
EXAMPLE This document and IEC 61496-2 are used for AOPDs; this document and IEC 61496-3 are used for
AOPDDRs.
Where a part covering the sensing technology does not exist, IEC TS 62998-1 is used.
Where the IEC 61496 series does not contain all necessary provisions, IEC TS 62998-1 is
used.
It is an additional possibility to combine those aspects covered by the IEC 61496 series in
addition to IEC TS 62998-1.
This document does not specify the dimensions or configuration of the detection zone and its
disposition in relation to hazards in 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.
While a data interface can be used to control optional safety-related ESPE functions
(Annex A), this document does not provide specific requirements. Requirements for these
safety-related functions can be determined by consulting other standards (for example,
IEC 61508 (all parts), IEC 62046, IEC 62061, and ISO 13849-1).
This document can be relevant to applications other than those for the protection of persons,
for example for the protection of machinery or products from mechanical damage. In those
applications, different requirements can be appropriate, for example when the materials that
have to be recognized by the sensing function have different properties from those of
persons.
This document does not deal with requirements for ESPE functions not related to the
protection of persons (e.g. using sensing unit data for navigation).
This document does not deal with electromagnetic compatibility (EMC) emission
requirements.

Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 1: Allgemeine Anforderungen und Prüfungen (IEC 61496-1:2020)

Sécurité des machines - Equipements de protection électro-sensibles - Partie 1: Exigences générales et essais (IEC 61496-1:2020)

L'IEC 61496-1:2020 définit les exigences générales de conception, de construction et d'essai des équipements de protection électrosensibles (ESPE) sans contact spécifiquement conçus pour détecter des personnes au sein d’un système relatif à la sécurité. Une attention particulière est accordée aux exigences de fonctionnement et de conception assurant la satisfaction aux performances relatives à la sécurité appropriées. Un ESPE peut proposer des fonctions facultatives liées à la sécurité: les exigences relatives à celles-ci sont données à l’Annexe A. L'IEC 61496-1:2020 est destiné à être utilisé avec une partie ultérieure de l’IEC 61496 qui définit des exigences particulières en fonction de la technologie de détection. En l’absence d’une partie couvrant la technologie de détection, l’IEC TS 62998-1 est utilisée. Dans le cas où la série IEC 61496 ne contient pas toutes les dispositions nécessaires, l’IEC TS 62998-1 est utilisée. Il est en outre possible de combiner ces aspects couverts par la série IEC 61496 à l’IEC TS 62998-1. Le présent document ne spécifie ni les dimensions ou la configuration de la zone de détection, ni sa disposition par rapport aux dangers dans toute 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. Bien qu’une interface de données puisse être utilisée pour commander des fonctions de l'ESPE relatives à la sécurité facultatives (Annexe A), le présent document ne fournit pas d’exigences particulières. Les exigences liées à ces fonctions relatives à la sécurité peuvent être déterminées en consultant d'autres normes (par exemple, l'IEC 61508 (toutes les parties), l’IEC 62046, l’IEC 62061, et l'ISO 13849-1). 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 différentes 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 relatives aux fonctions de l’ESPE non liées à la protection des personnes (en utilisant, par exemple, les données de l’élément de détection en matière de navigation). Le présent document ne traite pas des exigences d’émission relatives à la compatibilité électromagnétique (CEM). L'IEC 61496-1:2020 annule et remplace la troisième édition parue en 2012. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: a) Il a été défini que certaines exigences relatives aux ESPE dépendant de la technologie de détection n’étaient pas incluses dans l’IEC 61496-1. Ces exigences sont fournies dans une partie ultérieure de l’IEC 61496. b) Les exigences de protection contre les influences environnementales issues des parties ultérieures de l’IEC 61496 et qui sont communes à tous les ESPE ont été consolidées dans l’IEC 61496-1. c) Certaines procédures d’essai de l’IEC 61496-1 étaient incomplètes. Elles ont été enrichies par des procédures plus détaillées et étape par étape. d) Certaines exigences et procédures de l’IEC 61496-1 sont désormais couvertes par de nouvelles normes génériques relatives à la sécurité des machines. Les exigences de l’IEC 61496-1 ont été harmonisées avec des références à ces nouvelles norme

Varnost strojev - Električno občutljiva zaščitna oprema - 1. del: Splošne zahteve in preskusi (IEC 61496-1:2020)

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 61496-1:2020
01-december-2020
Nadomešča:
SIST EN 61496-1:2014
SIST EN 61496-1:2014/AC:2015

Varnost strojev - Električno občutljiva zaščitna oprema - 1. del: Splošne zahteve in

preskusi (IEC 61496-1:2020)
Safety of machinery - Electro-sensitive protective equipment - Part 1: General
requirements and tests (IEC 61496-1:2020)
Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 1:
Allgemeine Anforderungen und Prüfungen (IEC 61496-1:2020)
Sécurité des machines - Equipements de protection électro-sensibles - Partie 1:
Exigences générales et essais (IEC 61496-1:2020)
Ta slovenski standard je istoveten z: EN IEC 61496-1:2020
ICS:
13.110 Varnost strojev Safety of machinery
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
SIST EN IEC 61496-1:2020 en,fr,de

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

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

Sécurité des machines - Équipements de protection Sicherheit von Maschinen - Berührungslos wirkende

électrosensibles - Partie 1: Exigences générales et essais Schutzeinrichtungen - Teil 1: Allgemeine Anforderungen

(IEC 61496-1:2020) und Prüfungen
(IEC 61496-1:2020)

This European Standard was approved by CENELEC on 2020-08-18. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

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 61496-1:2020 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61496-1:2020
EN IEC 61496-1:2020 (E)
European foreword

The text of document 44/874/FDIS, future edition 4 of IEC 61496-1, 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 61496-1:2020.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-05-18

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-08-18

document have to be withdrawn

This document supersedes EN 61496-1:2013 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 61496-1:2020 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60447 NOTE Harmonized as EN 60447
IEC 60812 NOTE Harmonized as EN IEC 60812
IEC 61000-6-2 NOTE Harmonized as EN IEC 61000-6-2
IEC 61000-6-7:2014 NOTE Harmonized as EN 61000-6-7:2015 (not modified)
IEC 61010-1 NOTE Harmonized as EN 61010-1
IEC 61025 NOTE Harmonized as EN 61025
IEC 61131-2:2017 NOTE Harmonized as EN 61131-2:2017 (not modified)
IEC 62046 NOTE Harmonized as EN IEC 62046
To be published. Stage at the time of publication: EN 61131-2:2017.
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SIST EN IEC 61496-1:2020
EN IEC 61496-1:2020 (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.
Publication Year Title EN/HD Year
IEC 60068-2-6 - Environmental testing - Part 2-6: Tests - EN 60068-2-6 -
Test Fc: Vibration (sinusoidal)
IEC 60068-2-27 - Environmental testing - Part 2-27: Tests - EN 60068-2-27 -
Test Ea and guidance: Shock
IEC 60204-1 (mod) 2016 Safety of machinery - Electrical EN 60204-1 2018
equipment of machines - Part 1: General
requirements
IEC 60417 - Graphical symbols for use on equipment. - -
Index, survey and compilation of the
single sheets.
IEC 60445 - Basic and safety principles for man- - -
machine interface, marking and
identification - Identification of equipment
terminals, conductor terminations and
conductors
IEC 60529 - Degrees of protection provided by - -
enclosures (IP Code)
IEC 60721-3-5 - Classification of environmental conditions EN 60721-3-5 -
- Part 3: Classificationof groups of
environmental parameters and their
severities - Section 5: Ground vehicle
installations
---------------------- Page: 5 ----------------------
SIST EN IEC 61496-1:2020
EN IEC 61496-1:2020 (E)
Publication Year Title EN/HD Year
IEC/TR 60721-4-3 - Classification of environmental conditions - -
- Part 4-3: Guidance for the correlation
and transformation of environmental
condition classes of IEC 60721-3 to the
environmental tests of IEC 60068 -
Stationary use at weatherprotected
locations
IEC 60947-1 2007 Low-voltage switchgear and controlgear - EN 60947-1 2007
Part 1: General rules
+ A2 2014 + A2 2014
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques - Electrostatic discharge
immunity test
IEC 61000-4-3 2006 Electromagnetic compatibility (EMC) - EN 61000-4-3 2006
Part 4-3 : Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
+ A1 2007 + A1 2008
+ A2 2010 + A2 2010
IEC 61000-4-4 2012 Electromagnetic compatibility (EMC) - EN 61000-4-4 2012
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-5 2014 Electromagnetic compatibility (EMC) - EN 61000-4-5 2014
Part 4-5: Testing and measurement
techniques - Surge immunity test
+ A1 2017 + A1 2017
IEC 61000-4-6 2013 Electromagnetic compatibility (EMC) - EN 61000-4-6 2014
Part 4-6: Testing and measurement
techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
IEC 61000-4-11 2020 Electromagnetic compatibility (EMC) - EN IEC 61000-4-11 2020
Part 4-11: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests for equipment with input
current up to 16 A per phase
IEC 61000-4-29 2000 Electromagnetic compatibility (EMC) - EN 61000-4-29 2000
Part 4-29: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations on
d.c. input power port immunity tests
---------------------- Page: 6 ----------------------
SIST EN IEC 61496-1:2020
EN IEC 61496-1:2020 (E)
Publication Year Title EN/HD Year
IEC 61508 series Functional safety of EN 61508 series
electrical/electronic/programmable
electronic safety-related systems
IEC 62061 - Safety of machinery - Functional safety of - -
safety-related control systems
ISO 12100 - Safety of machinery - General principles EN ISO 12100 -
for design - Risk assessment and risk
reduction
ISO 13849-1 - Safety of machinery - Safety-related parts EN ISO 13849-1 -
of control systems - Part 1: General
principles for design
ISO 13849-2 2012 Safety of machinery - Safety-related parts EN ISO 13849-2 2012
of control systems - Part 2: Validation
---------------------- Page: 7 ----------------------
SIST EN IEC 61496-1:2020
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SIST EN IEC 61496-1:2020
IEC 61496-1
Edition 4.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety of machinery – Electro-sensitive protective equipment –
Part 1: General requirements and tests
Sécurité des machines – Équipements de protection électrosensibles –
Partie 1: Exigences générales et essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.110; 29.260.99 ISBN 978-2-8322-8435-3

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 9 ----------------------
SIST EN IEC 61496-1:2020
– 2 – IEC 61496-1:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 9

3 Terms and definitions .................................................................................................... 10

4 Functional, design and environmental requirements ...................................................... 14

4.1 Functional requirements ........................................................................................ 14

4.1.1 Normal operation ......................................................................................... 14

4.1.2 Sensing function .......................................................................................... 15

4.1.3 Types of ESPE ............................................................................................ 15

4.1.4 Types and required safety performance ....................................................... 15

4.1.5 Required PL or SIL and corresponding ESPE type ...................................... 16

4.2 Design requirements ............................................................................................. 16

4.2.1 Electrical supply .......................................................................................... 16

4.2.2 Fault detection requirements ........................................................................ 17

4.2.3 Electrical equipment of the ESPE................................................................. 18

4.2.4 Output signal switching devices (OSSDs) .................................................... 19

4.2.5 Indicator lights and displays ......................................................................... 21

4.2.6 Adjustment means ....................................................................................... 22

4.2.7 Disconnection of electrical assemblies ......................................................... 22

4.2.8 Non-electrical components ........................................................................... 22

4.2.9 Common cause failures ............................................................................... 22

4.2.10 Programmable or complex integrated circuits ............................................... 22

4.2.11 Software, programming, functional design of integrated circuits ................... 22

4.2.12 Integrity of the ESPE detection capability..................................................... 23

4.2.13 Test piece .................................................................................................... 23

4.3 Environmental requirements ................................................................................. 23

4.3.1 Ambient air temperature range and humidity ................................................ 23

4.3.2 Electrical disturbances ................................................................................. 23

4.3.3 Mechanical environment .............................................................................. 26

4.3.4 Enclosures ................................................................................................... 27

4.3.5 Light interference ......................................................................................... 27

5 Testing .......................................................................................................................... 28

5.1 General ................................................................................................................. 28

5.1.1 Type tests .................................................................................................... 28

5.1.2 Test conditions ............................................................................................ 29

5.1.3 Test results .................................................................................................. 30

5.2 Functional tests .................................................................................................... 30

5.2.1 Sensing function .......................................................................................... 30

5.2.2 Response time ............................................................................................. 30

5.2.3 Limited functional tests ................................................................................ 31

5.2.4 Periodic test................................................................................................. 31

5.2.5 Indicator lights and displays ......................................................................... 32

5.2.6 Means of adjustment .................................................................................... 32

5.2.7 Rating of components .................................................................................. 32

5.2.8 Output signal switching devices (OSSD) ...................................................... 32

---------------------- Page: 10 ----------------------
SIST EN IEC 61496-1:2020
IEC 61496-1:2020 © IEC 2020 – 3 –

5.3 Performance testing under fault conditions ........................................................... 33

5.3.1 General........................................................................................................ 33

5.3.2 Type 1 ESPE ............................................................................................... 33

5.3.3 Type 2 ESPE ............................................................................................... 33

5.3.4 Type 3 ESPE ............................................................................................... 33

5.3.5 Type 4 ESPE ............................................................................................... 33

5.4 Environmental tests .............................................................................................. 34

5.4.1 Rated supply voltage ................................................................................... 34

5.4.2 Ambient temperature variation and humidity ................................................ 34

5.4.3 Effects of electrical disturbances ................................................................. 35

5.4.4 Mechanical influences .................................................................................. 40

5.4.5 Enclosures ................................................................................................... 42

5.4.6 Light interference ......................................................................................... 42

5.5 Validation of programmable or complex integrated circuits .................................... 44

5.5.1 General........................................................................................................ 44

5.5.2 Complex or programmable integrated circuits .............................................. 44

5.5.3 Software, programming, functional design of integrated circuits ................... 44

5.5.4 Test results analysis statement .................................................................... 44

6 Marking for identification and for safe use ..................................................................... 44

6.1 General ................................................................................................................. 44

6.2 ESPE supplied from a dedicated power supply ..................................................... 45

6.3 ESPE supplied from an internal electrical power source ........................................ 45

6.4 Adjustment ............................................................................................................ 45

6.5 Enclosures ............................................................................................................ 45

6.6 Control devices ..................................................................................................... 46

6.7 Terminal markings ................................................................................................ 46

6.8 Marking durability ................................................................................................. 46

7 Accompanying documents ............................................................................................. 46

Annex A (normative) Optional functions of the ESPE ........................................................... 49

A.1 General ................................................................................................................. 49

A.2 External device monitoring (EDM) ......................................................................... 49

A.2.1 Functional requirements .............................................................................. 49

A.2.2 Fault condition requirements ........................................................................ 49

A.2.3 Verification .................................................................................................. 49

A.2.4 Information for use ....................................................................................... 50

A.3 Stopping performance monitor (SPM) ................................................................... 50

A.3.1 Functional requirements .............................................................................. 50

A.3.2 Fault condition requirements ........................................................................ 50

A.3.3 Verification .................................................................................................. 50

A.3.4 Marking........................................................................................................ 51

A.4 Secondary switching device (SSD) ........................................................................ 51

A.4.1 Functional requirements .............................................................................. 51

A.4.2 Fault condition requirements ........................................................................ 51

A.4.3 Verification .................................................................................................. 51

A.5 Start interlock ....................................................................................................... 51

A.5.1 Functional requirements .............................................................................. 51

A.5.2 Fault condition requirements ........................................................................ 52

A.5.3 Verification .................................................................................................. 52

A.5.4 Indication ..................................................................................................... 52

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SIST EN IEC 61496-1:2020
– 4 – IEC 61496-1:2020 © IEC 2020

A.6 Restart interlock .................................................................................................... 52

A.6.1 Functional requirements .............................................................................. 52

A.6.2 Fault condition requirements ........................................................................ 52

A.6.3 Verification .................................................................................................. 52

A.6.4 Indication ..................................................................................................... 53

A.7 Muting................................................................................................................... 53

A.7.1 General........................................................................................................ 53

A.7.2 Functional requirements .............................................................................. 53

A.7.3 Fault condition requirements ........................................................................ 53

A.7.4 Verification .................................................................................................. 53

A.7.5 Indication ..................................................................................................... 54

A.8 Reinitiation of machine operation facility ............................................................... 54

A.8.1 General........................................................................................................ 54

A.8.2 Functional requirements .............................................................................. 54

A.8.3 Fault condition requirements ........................................................................ 54

A.8.4 Verification .................................................................................................. 54

A.9 Setting the detection zone and/or other safety-related parameters ........................ 55

A.9.1 Functional requirements .............................................................................. 55

A.9.2 Verification .................................................................................................. 55

Annex B (normative) Catalogue of single faults affecting the electrical equipment of

the ESPE, to be applied as specified in 5.3 ........................................................................... 56

B.1 General ................................................................................................................. 56

B.2 Conductors and connectors .................................................................................. 56

B.3 Switches ............................................................................................................... 56

B.4 Discrete electrical components ............................................................................. 56

B.5 Solid-state electrical components .......................................................................... 56

B.6 Motors .................................................................................................................. 56

Annex C (informative) Design review ................................................................................... 57

Bibliography .......................................................................................................................... 58

Figure 1 – Examples of ESPEs using safety-related communication interfaces ..................... 21

Figure 2 – Test setup for the EMC test of ESPEs with safety-related communication

interfaces .............................................................................................................................. 30

Table 1 – Types and required safety performance ................................................................. 15

Table 2 – Required PL or SIL and corresponding ESPE type ............................................... 16

Table 3 – Supply voltage dips and interruptions for AC power ports ...................................... 24

Table 4 – Supply voltage dips and interruptions for DC power ports ...................................... 24

Table 5 – Vibration test for stationary use ............................................................................. 40

Table 6 – Sinusoidal vibration test for ground vehicle installations ........................................ 40

Table 7 – Broadband vibration test for ground vehicle installations ....................................... 41

Table 8 – Shock test for stationary use ................................................................................. 41

Table 9 – Shock test for ground vehicle installation............................................................... 42

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SIST EN IEC 61496-1:2020
IEC 61496-1:2020 © IEC 2020 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –
Part 1: General requirements and tests
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

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Publications.
8) Atten
...

SLOVENSKI STANDARD
SIST EN 61496-1:2014/oprA1:2019
01-junij-2019

Varnost strojev - Električno občutljiva zaščitna oprema - 1. del: Splošne zahteve in

preskusi
Safety of machinery - Electro-sensitive protective equipment - Part 1: General
requirements and tests
Sicherheit von Maschinen - Berührungslos wirkende Schutzeinrichtungen - Teil 1:
Allgemeine Anforderungen und Prüfungen
Sécurité des machines - Equipements de protection électro-sensibles - Partie 1:
Exigences générales et essais
Ta slovenski standard je istoveten z: EN 61496-1:2013/prA1:2019
ICS:
13.110 Varnost strojev Safety of machinery
31.260 Optoelektronika, laserska Optoelectronics. Laser
oprema equipment
SIST EN 61496-1:2014/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 61496-1:2014/oprA1:2019
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SIST EN 61496-1:2014/oprA1:2019
44/845/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61496-1/AMD1 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2019-03-29 2019-06-21
SUPERSEDES DOCUMENTS:
44/832/CD, 44/840A/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 1: General requirements

and tests
PROPOSED STABILITY DATE: 2022
NOTE FROM TC/SC OFFICERS:

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 61496-1:2014/oprA1:2019
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.
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SIST EN 61496-1:2014/oprA1:2019
IEC CDV 61496-1:2012/ – 3 –
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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 remain unchanged until the maintenance result date indicated on the IEC web site under

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 ___________

17 The National Committees are requested to note that for this publication the maintenance result date is 20xx.

___________
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21 Introduction
22 Delete the last paragraph.

23 Due to the complexity of the technology used to implement ESPEs, there are many issues that

24 are highly dependent on analysis and expertise in specific test and measurement techniques.

25 In order to provide a high level of confidence, independent review by relevant experts is

26 recommended.
28 1 Scope
29 Add, after the first paragraph:

30 This Part 1 is intended to be used with a subsequent part that provides particular

31 requirements based on the sensing technology. Where a part covering the sensing technology

32 does not exist, this Part 1 can be used for guidance.

33 Example: Part 1 and Part 2 are used for AOPDs, Part 1 and Part 3 are used for AOPDDRs.

34 Add, before the last paragraph:

35 This standard does not deal with requirements for ESPE functions not related to the

36 protection of persons (e.g. using sensing unit data for navigation).
38 3 Terms and definitions
39 Add, after definition 3.30, the following new definition:
40 3.31
41 type test
42 conformity test made on one or more items representative of the production
43 [SOURCE: ISO/IEC Guide 2 (14.5 MOD)]
44 4.1.3 Types of ESPE
45 Replace the last sentence of the first paragraph with the following text:

46 It is the responsibility of the machine supplier and/or the user to prescribe which type is

47 required for a particular application.
48 4.2.2.1 General
49 Replace the last paragraph with the following text:

50 At power on, the OSSD(s) shall not be signalled to the ON-state until it has been verified that

51 there are no safety critical faults.
52 4.2.2.3 Particular requirements for a type 2 ESPE
53 Delete the paragraph following Note 2:
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54 If the periodic test is automatically initiated, the correct functioning of the periodic test shall be

monitored. In the event of a fault, the OSSD(s) shall be signalled to go to the OFF-state. If

56 one or more OSSDs does not go to the OFF-state, a lock-out condition shall be initiated.

57 4.2.2.4 Particular requirements for a type 3 ESPE
58 Replace entire clause with the following text:

59 A single fault in the sensing device resulting in a complete loss of the stated ESPE detection

60 capability shall cause the ESPE to go to a lock-out condition within the specified response

61 time.

62 A single fault resulting in a deterioration of the stated ESPE detection capability shall cause

63 the ESPE to go to a lock-out condition within a time period of 5 s following the occurrence of

64 that fault.

65 A single fault resulting in an increase in response time beyond the specified value or

66 preventing at least one OSSD going to the OFF-state shall cause the ESPE to go to a lock-out

67 condition immediately, i.e. within the response time, or immediately upon any of the following

68 demand events where fault detection requires a change in state:
69 - on actuation of the sensing function;
70 - on switch off/on;

71 - on reset of the start interlock or the restart interlock, if available (see A.5 and A.6);

72 - on the application of an external test signal, if available.

73 In cases where a single fault which in itself does not cause a failure to danger is not detected,

74 the occurrence of one additional fault shall not cause a failure to danger. For verification of

75 this requirement, see 5.3.4.
76 4.2.3.2 Protection against electric shock
77 Replace the paragraph with the following text:

78 Protection against electric shock shall be provided in accordance with 6 of IEC 60204-1:2016.

79 4.2.3.6 Wiring
80 Add, after clause 4.2.3.6 the following new clause:
81 4.2.3.7 Fire and flame protection

82 Fire and flame protection shall be provided in accordance with relevant standards.

83 Note IEC 60204-1, IEC 60947-1 and IEC 61010-1 are examples of relevant standards that can provide guidance.

84 4.2.4.1 General

85 Replace the second paragraph, the NOTE and the third paragraph with the following 2

86 paragraphs: the following last paragraph:

87 The OSSD should be so rated that their loads can be switched without the use of arc

88 suppression devices fitted across the loads.
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89 The output circuit of the OSSDs should be adequately protected to prevent failure to danger,

90 for example welded contacts under overcurrent conditions (see 7.2.9 of IEC 60204-1:2016).

91 4.2.4.3 Solid state OSSDs
92 column of the data table, the value of Output On-state from “6 mA” to “2
Change, in the 5
93 mA”.
94 Replace NOTE 3 with the following:

95 NOTE 3 The values above meet the requirements of IEC 61131-2:2017 (see 3.13 of IEC 61131-2:2017), for a

96 nominal rated supply voltage of 24 V d.c. When other supply voltages are used, this standard may be used as a

97 guide. IEC 61131-2:2017 may be referred to for additional information.
98 Replace NOTE 4 with the following:

99 NOTE 4 It is possible that a leakage current greater than 2 mA can lead to a failure to danger.

100
101 4.2.5 Indicator lights and displays
102 Replace the first paragraph with the following text:
103 Devices shall be provided by the ESPE supplier to:
104 4.2.9 Common cause failures
105 Replace the last paragraph with the following text and new NOTE 3:

106 Where a common semi-conductor substrate is used for more than one channel of a multi-

107 channel system, the "Special architecture requirements for on-chip redundancy" of IEC

108 61508-2 shall apply.
109 NOTE 3 For the IEC61508-2:2010 edition, this is Annex E.
110 4.2.11.2 Requirements
111 After clause 4.2.11.2, add two new clauses 4.2.12 and 4.2.13 as follows:
112 4.2.12 Integrity of the ESPE detection capability

113 The design of the ESPE shall ensure that the detection capability is not decreased below the

114 limits specified by the supplier and in the relevant part of this standard.
115 4.2.13 Test piece or device

116 A test piece or device shall be defined as part of the ESPE design for use in verifying the

117 detection capability. The test piece will be defined based on the sensing technology and test

118 requirements as defined in clause 5 of the relevant part of this standard.
119 4.3.1 Ambient air temperature range and humidity
120 Add, after the first paragraph the following new paragraph:
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121 When the supplier states that the ESPE can be used in an environment where condensing is

122 possible, the ESPE shall not fail to danger when subjected to a rapid change of temperature

123 and humidity leading to condensation on the optical window. This requirement is verified by

124 the condensing test of 5.4.2.
125 4.3.2.2 External supply voltage interruptions
126 Replace clause 4.3.2.2 Heading, text, notes and tables with the following:
127 4.3.2.2 External supply voltage dips and interruptions

128 For a.c. powered devices, the requirements of Table 3 apply for supply voltage dips and

129 interruptions in accordance with IEC 61000-4-11:2004+AMD1:2017.

130 For d.c. powered devices, the requirements of Table 4 apply for supply voltage dips and

131 interruptions in accordance with IEC 61000-4-29:2000.

132 When a d.c. powered ESPE is designed to be supplied from a specific type of power supply(s)

133 (for example, supplied direct from a safety-related communication interface), the supply

134 voltage dips and interruptions in this clause may be applied to the primary input of the

135 specified power supply instead of direct to the ESPE.
136 Table 3 – Supply voltage dips and interruptions for AC power ports
137
test number U residual voltage Cycles
(%)
1 0 1
2 70 25/30
3 40 10/12
138 Note 1 U is the rated voltage for the equipment.

139 Note 2 “10/12 cycles” means “10 cycles for 50 Hz test” and “12 cycles for 60 Hz test” (and similarly for 25/30

140 cycles).
141 Table 4 – Supply voltage dips and interruptions for DC power ports
test number U residual voltage Dip time
(%) (ms)
1 40 10
2 70 10
3 0 20
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142 4.3.2.3 Fast transient/burst
143 Replace the heading of clause 4.3.2.3 as follows:
144 4.3.2.3 Burst
145 General requirements
4.3.2.3.1
146 Replace the text and table of this clause with the following:

147 The ESPE shall continue in normal operation when subjected to burst in accordance with

148 IEC 61000-4-4:2012:
Ports for power lines for d.c. or less than 50 V a.c. Voltage: ± 1 kV
Ports for signal lines, etc. with a length Frequency: 5 kHz
exceeding 3 m
Ports for power lines for 50 V a.c. and above Voltage: ± 2 kV
Frequency: 5 kHz
149
150 4.3.2.3.2 Additional requirements
151 Replace the text and table of this clause with the following:

152 A type 3 or a type 4 ESPE shall not fail to danger when subjected to burst in accordance with

153 IEC 61000-4-4:2012:
Ports for power lines for d.c. and for less than 50 V a.c. Voltage: ± 2 kV
Ports for signal lines, etc. with a length exceeding 3 m Frequency: 5 kHz
Ports for power lines for 50 V a.c. and above Voltage: ± 4 kV
Frequency: 5 kHz
154
155 4.3.2.4 Fast transient/surge
156 Replace the heading of clause 4.3.2.4 as follows:
157 4.3.2.4 Surge
158 4.3.2.4.1 General requirements
159 Replace the text and table of this clause with the following:

160 The ESPE shall continue in normal operation when subjected to surge in accordance with

161 IEC 61000-4-5: 2014+AMD1:2017:
Ports for signal lines with a length exceeding 30 m or the ± 1 kV, common mode
line is applied outside the building
Power ports for d.c. and for less than 50 V a.c.
Ports for power lines for 50 V a.c. and above ± 2 kV, common mode
± 1 kV, differential mode
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162
163 4.3.2.4.2 Additional requirements
164 Replace the text and table of this clause with the following:

165 A type 3 or a type 4 ESPE shall not fail to danger when subjected to surge in accordance with

166 IEC 61000-4-5: 2014+AMD1:2017:
Ports for signal lines with a length exceeding 30 m or the ± 2 kV, common mode
line is applied outside the building
Power ports for d.c. and for less than 50 V a.c.
Power ports for 50 V a.c. and above ± 4 kV, common mode
± 2 kV, differential mode
167
168 4.3.2.5.1 General requirements
169 Replace the text and table of this clause with the following:

170 The ESPE shall continue in normal operation when subjected to an electromagnetic field in

171 accordance with IEC 61000-4-3:2006+AMD1:2007+AMD2:2010:
Enclosure Port 80 MHz – 1000 MHz, 10 V/m
1,4 GHz – 6,0 GHz, 3 V/m
172
173 4.3.2.5.2 Additional requirements
174 Replace the text and table of this clause with the following:

175 A type 3 or a type 4 ESPE shall not fail to danger when subjected to an electromagnetic field

176 in accordance with IEC 61000-4-3: 2006+AMD1:2007+AMD2:2010:
Enclosure Port 80 MHz – 1000 MHz, 30 V/m
1,4 GHz – 6,0 GHz, 10 V/m
177

178 The test of 1,4 to 6,0 GHz is required only at the frequencies or frequency ranges defined in IEC

179 61000-6-7:2014, Table 7 – “General frequency ranges for mobile transmitters and ISM for radiated

180 tests”.
181 4.3.2.6.1 General requirements
182 Replace the text and tables of this clause with the following:

183 The ESPE shall continue in normal operation when subjected to conducted radio-frequency

184 disturbances in accordance with IEC 61000-4-6:2013:
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Ports for signal lines with a length exceeding 3 m Test level: 10 V
Power ports. Earth ports Frequency range 150 kHz to 80 MHz
185
186 4.3.2.6.2 Additional requirements
187 Replace the text and tables of this clause with the following:

188 A type 3 or a type 4 ESPE shall not fail to danger when subjected to conducted radio-

189 frequency disturbances in accordance with IEC 61000-4-6:2013:
Ports for signal lines with a length exceeding 3 m Test level: 30 V
Power ports. Frequency range 150 kHz to 80 MHz
Earth ports
190
191 4.3.2.7.1 General requirements
192 Replace the text and tables of this clause with the following:

193 The ESPE shall continue in normal operation when subjected to an electrostatic discharge in

194 accordance with IEC 61000-4-2:2008:
Enclosure Port air discharge, ± 8 kV
contact discharge, ± 6 kV
195
196 4.3.2.7.2 Additional requirements
197 Replace the text and tables of this clause with the following:

198 A type 3 or a type 4 ESPE shall not fail to danger when subjected to an electrostatic

199 discharge in accordance with IEC 61000-4-2:2008:
Enclosure Port air discharge, ± 15 kV
contact discharge, ± 8 kV
200
201 4.3.3 Mechanical environment
202 Replace clauses 4.3.3.1 and 4.3.3.2 with the following three clauses:
203 4.3.3.1 General

204 The manufacturer shall specify the possible application(s) of the ESPE by selecting at least

205 one of the following:

206 a) If the supplier specifies the ESPE for use in stationary applications, the supplier shall

207 choose an appropriate 3M class according to IEC 60721-3-3.
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208 b) If the supplier specifies the ESPE for use on ground vehicles, the supplier shall choose an

209 appropriate 5M class according to IEC 60721-3-5.

210 Note 1 Different parts of an ESPE, e. g. sensing device and control device may be assigned to different classes

211 depending on the manufacturer’s specification of their application.

212 Note 2 - Specification of a 5M class does not mean that the impact from foreign bodies, stones have to

213 be tested in accordance with IEC 60068-2-75 in general. Other parts of the IEC 61496 series can

214 specify such test
215 4.3.3.2 Vibration
216 The ESPE shall pass the vibration tests of 5.4.4.1.
217 4.3.3.3 Shock
218 The ESPE shall pass the shock tests of 5.4.4.2.
219 4.3.4 Enclosures

220 Clause 4.3.5 is moved here from IEC 61496-2. Insert, after clause 4.3.4, the new clause 4.3.5

221 as follows:
222 4.3.5 Light interference

223 When an ESPE uses technology that can be influenced by ambient light conditions, that ESPE

224 shall meet the requirements of this clause.

225 Where other parts of the IEC 61496 series refer to “Light interference”, then the requirements

226 and tests of that part will apply.
227 The ESPE shall continue in normal operation when subjected to
228 − incandescent light;
229 − fluorescent light operated with high-frequency electronic power supply.
230 The ESPE shall not fail to danger when subjected to
231 − incandescent light (simulated daylight using a quartz lamp);
232 − flashing beacons;
233 − fluorescent light operated with high-frequency electronic power supply;

234 − for a type 3 and type 4 ESPE, radiation from an emitting assembly (or element) of

235 identical design. Combinations of technical measures and configuration procedures in

236 accordance with the information for use provided by the supplier shall be tested

237 Note 1 Radiation from an emitting assembly of identical design is considered to be a worse case example of

238 interference from a LED lamp.

239 Note 2 For type 2 ESPEs the risk of failure to danger from an emitting element of identical design can be reduced

240 by installation measures provided by the supplier.

241 These requirements shall be met when the ESPE conforms to the tests in 5.4.6.

242 No requirements are given for immunity to other extraneous light sources which may cause

243 abnormal operation or failure to danger. A requirement for the supplier to inform the user of

244 potential problems is given in 7 (ff).
245
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246 5.1.1.2 Operating condition
247 Add, at the end of clause 5.1.1.2, the following text:

248 As a result of the analysis of the design and the integrity of the detection capability of the

249 ESPE a test plan shall be established considering the test conditions and parameters outlined

250 in this document. In the following tests, it shall be verified that when the OSSDs go to the

251 OFF-state, they remain in the OFF-state while the test piece is present in the detection zone.

252 The minimum test conditions shall be as specified in this standard or by the supplier,

253 whichever is more stringent.
254 Tests can be omitted if an analysis can demonstrate that

255 − limited intended use in application justifies omission of test (e.g. only for top mounting, for

256 use only in non-condensing environment), or

257 − a less stringent test is replaced by a more stringent test (e.g. test of equal detection

258 capability at minimum working range versus maximum working range), or

259 − detection capability is not affected by the environmental condition (e.g. condensation).

260 The analysis shall be documented in the test plan.
261 5.1.2.2 Measurement accuracy

262 Add, at the end of the bullet list, the following two new items (these two items are moved here

263 from IEC 61496-2):
264 – for angular measurement: ± 0,1°;
265 – for light intensity measurement: ± 10 %.
266
267 5.1.3 Test results
268 Correct typo in the second sentence as follows:
269 The test results shall be arranged in a form . . . . .
270
271 5.2.3.3 Limited functional test B (B test)

272 Replace, in the first sentence of the second paragraph, the word “brought” with “inserted”.

273 Replace the last paragraph with the following text:

274 It can be necessary to repeat the above tests continuously depending on test requirements.

275 5.2.3.4 Limited functional test C (C test)

276 Delete the NOTE at the end of the clause. Replace the second paragraph with the following

277 text:
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278 If the ESPE cannot resume normal operation due to a permanent component failure, it is

279 acceptable if it is verified that the OSSD(s) remain in the OFF-state.
280 5.3.3 Type 2 ESPE
281 Delete the last paragraph of clause 5.3.3, as follows:

282 Where automatic initiation of the periodic test is provided, it shall be verified that faults that lead to the

283 loss of the monitoring function are detected and cause at least one OSSD to go to the OFF-state. If

284 one or more OSSDs does not go to the OFF-state, a lock-out condition shall be initiated.

285 5.3.5 Type 4 ESPE
286 Replace the third and fourth paragraphs with the following new paragraph:

287 Testing for the accumulation of more than two faults need not be carried out.

288 5.4.2 Ambient temperature variation and humidity
289 Insert, before the first paragraph, the following new heading:
290 5.4.2.1 General
291 Insert, before the second paragraph, the following new heading:
292 5.4.2.2 Temperature variation and humidity test sequence

293 Add, after the new clause 5.4.2.2, a new clause 5.4.2.3 with the following heading and text:

294 5.4.2.3 Condensing test procedure
295 The ESPE shall be subjected to the following condensing test:

296 a) the ESPE shall be supplied with its rated voltage and stored in a test chamber at an

297 ambient temperature of 5 °C for 1 h;

298 b) the ambient temperature and the humidity shall be changed within a time period of up to

299 2 min to a temperature of (25 ± 5) °C and a relative humidity of (70 ± 5) %;
300 c) a C-test shall be performed with a duration of 10 min using a test piece;

301 d) if a restart interlock is available it shall not be operational during the C-test;

302
303 5.4.3.2 Supply voltage interruptions
304 Replace entire clauses 5.4.3.2 through 5.4.3.7 with the following:
305
306 5.4.3.2 Supply voltage dips and interruptions

307 Each applicable test specified in 4.3.2.2 shall be performed at least 10 times in the ON state

308 of the ESPE and 10 times in the OFF state. The OFF state shall be achieved by inserting a

309 test piece into the detection zone.
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310 During tests 1 and 2, the ESPE shall remain in normal operation.

311 During test 3, it is permissible that the OSSDs go to the OFF state when applying the

312 interruption. If a lock-out condition occurs, the ESPE shall be recovered from the lock-out

313 condition before continuing the test.

314 Where the same lock-out condition occurs for 3 times, the test is deemed as passed and no

315 further interruptions are required in this state.
316 5.4.3.3 Burst
317 5.4.3.3.1 General requirements

318 For coupling of d.c. or less than 50 V a.c. power ports and signal ports, a capacitive coupling clamp

319 according IEC 61000-4-4:2012 shall be used. For other a.c. power ports, a coupling device network

320 (CDN) according IEC 61000-4-4:2012 shall be used.

321 The ESPE shall be subjected to bursts as specified in 4.3.2.3.1. A B-Test shall be performed in

322 accordance to following test sequence:

323 1. The OSSD(s) shall be in the ON-state in absence of a Test piece in the detection zone.

324 2. The test piece shall be placed in the detection zone. The OSSD(s) shall respond by going

325 from the ON-state to the OFF-state.

326 3. The disturbances in accordance to clause 4.3.2.3.1 shall be applied with a duration of at least

327 1 min per exposure. During the application, it shall be observed that the OSSD(s) remain(s) in

328 the OFF-state with the test piece being present in the detection zone.

329 4. The test piece shall be removed from the detection zone. The OSSD(s) shall respond by going

330 from the OFF-state to the ON-state.

331 5. The disturbance according clause 4.3.2.3.1 shall be applied again with a duration of at least 1

332 minute per exposure. During the exposure, it shall be observed that the OSSD(s) remain(s) in

333 the ON-state.

334 6. The test piece shall be placed in the detection zone. The OSSD(s) shall respond by going

335 from the ON-state to the OFF-state.

336 The test specified in 4.3.2.3.1 consists of several exposures (different coupling methods,

337 voltages, polarities). It is acceptable to run through the specified test sequence only once with

338 all exposures applied sequentially in step 3 and again in step 5, or the test sequence may be

339 run through several times with only one or a selection of exposures applied in each run.

340 5.4.3.3.2 Additional tests

341 A type 3 or a type 4 ESPE shall also be subjected to burst as specified in 4.3.2.3.2. A C-Test

342 shall be performed as follows:

343 1. The OSSD(s) shall be in the ON-state in absence of a Test piece in the detection zone.

344 2. The test piece shall be placed in the detection zone. The OSSD(s) shall respond by going

345 from the ON-state to the OF
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