Low-voltage switchgear and controlgear - Part 5-3: Control circuit devices and switching elements - Requirements for proximity devices with defined behaviour under fault conditions (PDDB)

IEC 60947-5-3:2013 series provides additional requirements to those given in IEC 60947-5-2. It addresses the fault performance aspects of proximity devices with a defined behaviour under fault conditions (PDDB). It does not address any other characteristics that can be required for specific applications. This second edition replaces the first edition published in 1999 and its amendment published in 2005. It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) general principles of IEC 61508 series;
b) classification according to the requirements of IEC 62061;
c) classification according to ISO 13849-1.
This publication is to be read in conjunction with IEC 60947-1:2007 and IEC 60947-5-2:2007..

Appareillage à basse tension - Partie 5-3: Appareils et éléments de commutation pour circuits de commande - Exigences pour dispositifs de détection de proximité à comportement défini dans des conditions de défaut (PDDB)

La CEI 60947-5-3:2013 fournit des exigences supplémentaires à celles énoncées dans la CEI 60947-5-2. Elle couvre les aspects de défaut des dispositifs de détection de proximité à comportement défini (PDDB) dans les conditions de défaut. Elle ne couvre aucune autre fonctionnalité qui peut être requise pour des applications spécifiques. Cette deuxième édition remplace la première édition publiée en 1999 et son amendement publié en 2005. Il s'agit d'une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) principes généraux de la série CEI 61508;
b) classification selon les exigences de la CEI 62061;
c) classification selon l'ISO 13849-1.
Cette publication doit être lue conjointement avec la CEI 60947-1:2007 et IEC 609947-5-2:2007.

General Information

Status
Published
Publication Date
05-Aug-2013
Current Stage
PPUB - Publication issued
Start Date
06-Aug-2013
Completion Date
06-Aug-2013
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IEC 60947-5-3:2013 - Low-voltage switchgear and controlgear - Part 5-3: Control circuit devices and switching elements - Requirements for proximity devices with defined behaviour under fault conditions (PDDB)
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IEC 60947-5-3
Edition 2.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear –
Part 5-3: Control circuit devices and switching elements – Requirements for
proximity devices with defined behaviour under fault conditions (PDDB)
Appareillage à basse tension –
Partie 5-3: Appareils et éléments de commutation pour circuits de commande –
Exigences pour dispositifs de détection de proximité à comportement défini
dans des conditions de défaut (PDDB)
IEC 60947-5-3:2013
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60947-5-3
Edition 2.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Low-voltage switchgear and controlgear –
Part 5-3: Control circuit devices and switching elements – Requirements for
proximity devices with defined behaviour under fault conditions (PDDB)
Appareillage à basse tension –
Partie 5-3: Appareils et éléments de commutation pour circuits de commande –
Exigences pour dispositifs de détection de proximité à comportement défini
dans des conditions de défaut (PDDB)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 29.130.20 ISBN 978-2-8322-1030-7

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: 3 ----------------------
– 2 – 60947-5-3 © IEC:2013
CONTENTS

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

1 General ............................................................................................................................ 6

1.1 Scope ...................................................................................................................... 6

1.2 Normative references .............................................................................................. 6

2 Terms, definitions and abbreviations ................................................................................ 8

2.1 General ................................................................................................................... 8

2.2 Alphabetic index of terms ........................................................................................ 8

2.3 Basic terms and definitions ...................................................................................... 9

2.4 Terms and definitions concerning the architectural constraints .............................. 12

2.5 Terms and definitions concerning the parts of a PDDB .......................................... 13

2.6 Terms and definitions concerning the operation of a PDDB ................................... 14

2.7 Symbols and abbreviations .................................................................................... 15

3 Classification .................................................................................................................. 15

4 Characteristics ............................................................................................................... 15

4.1 General ................................................................................................................. 15

4.2 Constructional characteristics ................................................................................ 15

4.2.1 Proximity device with defined behaviour .................................................... 15

4.2.2 Specified target ......................................................................................... 15

5 Product information ........................................................................................................ 16

5.1 Nature of information ............................................................................................. 16

5.2 Identification .......................................................................................................... 16

5.3 Marking ................................................................................................................. 16

5.3.1 General ..................................................................................................... 16

5.3.2 Connection identification and marking ....................................................... 16

5.4 Instructions for installation, operation and maintenance......................................... 16

6 Normal service, mounting and transport conditions ......................................................... 17

6.1 Normal service conditions ..................................................................................... 17

6.2 Conditions during transport and storage ................................................................ 17

6.3 Mounting ............................................................................................................... 17

7 Constructional and performance requirements ................................................................ 17

7.1 Constructional requirements .................................................................................. 17

7.1.1 Materials ................................................................................................... 17

7.1.2 Current-carrying parts and their connections ............................................. 17

7.1.3 Clearance and creepage distances ............................................................ 17

7.1.4 Vacant ....................................................................................................... 17

7.1.5 Vacant ....................................................................................................... 17

7.1.6 Vacant ....................................................................................................... 17

7.1.7 Terminals .................................................................................................. 17

7.1.8 Provision for protective earthing ................................................................ 18

7.1.9 IP degree of protection (in accordance with IEC 60529) ............................. 18

7.2 Functional safety management .............................................................................. 18

7.3 Functional requirements specification for SRCFs ................................................... 18

7.3.1 General ..................................................................................................... 18

7.3.2 Safety integrity requirements specification for SRCFs ................................ 18

7.3.3 Electromagnetic compatibility .................................................................... 18

7.3.4 Design and development of PDDB ............................................................. 20

---------------------- Page: 4 ----------------------
60947-5-3 © IEC:2013 – 3 –

7.4 Information for use ................................................................................................ 20

7.4.1 Objective ................................................................................................... 20

7.4.2 Documentation for installation, use and maintenance ................................ 20

8 Tests .............................................................................................................................. 21

8.1 Kind of tests .......................................................................................................... 21

8.1.1 General ..................................................................................................... 21

8.1.2 Type tests ................................................................................................. 21

8.1.3 Routine tests ............................................................................................. 21

8.1.4 Sampling tests ........................................................................................... 21

8.2 Compliance with constructional requirements ........................................................ 21

8.3 Performances ........................................................................................................ 21

8.3.1 Test sequences ......................................................................................... 21

8.3.2 General test conditions .............................................................................. 21

8.3.3 Performances under no load, normal and abnormal load conditions ........... 21

8.3.4 Performances under short-circuit current conditions .................................. 22

8.4 Verification of operating distances ......................................................................... 22

8.5 Verification of resistance to vibration and shock .................................................... 22

8.6 Verification of electromagnetic compatibility .......................................................... 22

9 Modification .................................................................................................................... 23

9.1 Objective ............................................................................................................... 23

9.2 Modification procedure .......................................................................................... 23

Annex A (informative) Example of a simple control system in accordance with

IEC 61511 series .................................................................................................................. 24

Bibliography .......................................................................................................................... 28

Figure A.1 – Representation of the equipment under control ................................................. 24

Figure A.2 – Architecture of the safety related function ......................................................... 25

Table 1 – EMC requirements for PDDBs ............................................................................... 19

Table A.1 – Collection of reliability and structure data ........................................................... 25

---------------------- Page: 5 ----------------------
– 4 – 60947-5-3 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 5-3: Control circuit devices and switching elements –
Requirements for proximity devices with defined
behaviour under fault conditions (PDDB)
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

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

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

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

the latter.

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

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

services carried out by independent certification bodies.

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

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

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

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

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

Publications.

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

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60947-5-3 has been prepared by subcommittee 17B: Low-voltage

switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.

This second edition replaces the first edition published in 1999 and its amendment published

in 2005. It is a technical revision.

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

edition:
a) general principles of IEC 61508 series;
b) classification according to the requirements of IEC 62061;
c) classification according to ISO 13849-1.

This standard is to be read in conjunction with IEC 60947-1, Low voltage switchgear and

controlgear – Part 1: General rules and IEC 60947-5-2, Low-voltage switchgear and

---------------------- Page: 6 ----------------------
60947-5-3 © IEC:2013 – 5 –

controlgear – Part 5-2: Control circuit devices and switching elements – Proximity switches.

The provisions of Part 1 and Part 5-2 are only applicable to this standard where specifically

called for. The numbering of the subclauses of this standard is sometimes not continuous

because it is based on the numbering of the subclauses of IEC 60947-1 or IEC 60947-5-2.

The text of this standard is based on the following documents:
FDIS Report on voting
17B/1821/FDIS 17B/1826/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 in the IEC 60947 series, published under the general title Low-voltage

switchgear and controlgear, can be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 7 ----------------------
– 6 – 60947-5-3 © IEC:2013
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 5-3: Control circuit devices and switching elements –
Requirements for proximity devices with defined
behaviour under fault conditions (PDDB)
1 General
1.1 Scope

This part of IEC 60947 series provides additional requirements to those given in IEC 60947-5-

2. It addresses the fault performance aspects of proximity devices with a defined behaviour

under fault conditions (PDDB). It does not address any other characteristics that can be

required for specific applications.
This standard does not cover proximity devices with analogue output.

This Standard does not deal with any specific requirements on acoustic noise as the noise

emission of control circuit devices and switching elements is not considered to be a relevant

hazard.

For a PDDB used in applications where additional characteristics, dealt with in other

standards, are required, the requirements of all relevant standards apply.

The use of this standard alone does not demonstrate suitability for the implementation of any

specific safety related functionality. In particular, this standard does not provide requirements

for the actuation characteristics of a PDDB, or for means to reduce the effects of mutual

interference between devices, e.g. coded targets. Therefore these and any other application-

specific requirements will need to be considered in addition to the requirements of this

standard.

NOTE 1 Due to their behaviour under fault conditions, PDDBs can, for example, be used as interlocking devices

(see ISO 14119).

NOTE 2 The requirements for electro-sensitive protective equipment for the detection of persons are given in the

IEC 61496 series.
1.2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Test A: Cold

IEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic

(12 + 12 h cycle)
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
Amendment 1:1999
IEC 60947-1:2007, Low-voltage switchgear and controlgear – Part 1: General rules
Amendment 1:2010
---------------------- Page: 8 ----------------------
60947-5-3 © IEC:2013 – 7 –

IEC 60947-5-1:2003, Low-voltage switchgear and controlgear – Part 5-1: Control circuit

devices and switching elements – Electromechanical control circuit devices
Amendment 1:2009

IEC 60947-5-2:2007, Low-voltage switchgear and controlgear – Part 5-2: Control circuit

devices and switching elements – Proximity switches
Amendment 1:2012
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and

measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test

Amendment 1:2007
Amendment 2:2010
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2005, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-6:2008, Electromagnetic compatibility (EMC) – Part 4-6: Testing and

measurement techniques – Immunity to conducted disturbances, induced by radio-frequency

fields
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test

IEC 61000-4-11:2004, Electromagnetic compatibility (EMC) – Part 4-11: Testing and

measurement techniques – Voltage dips, short interruptions and voltage variations immunity

tests

IEC 61131-2:2007, Programmable controllers – Part 2: Equipment requirements and tests

IEC 61508-1:2010, Functional safety of electrical/electronic/programmable electronic safety-

related systems – Part 1: General requirements

IEC 61508-2:2010, Functional safety of electrical/electronic/programmable electronic safety-

related systems – Part 2: Requirements for electrical/electronic/programmable electronic

safety-related systems

IEC 61508-3:2010, Functional safety of electrical/electronic/programmable electronic safety-

related systems – Part 3: Software requirements

IEC 62061:2005, Safety of machinery – Functional safety of safety-related electrical,

electronic and programmable electronic control systems
Amendment 1:2012

ISO 13849-1:2006, Safety of machinery – Safety-related parts of control systems – Part 1:

General principles for design
---------------------- Page: 9 ----------------------
– 8 – 60947-5-3 © IEC:2013
2 Terms, definitions and abbreviations
2.1 General

For the purposes of this document, the terms and definitions given in IEC 60947-1 and

IEC 60947-5-2, as well as the following terms, definitions and abbreviations apply.

2.2 Alphabetic index of terms
Reference

assured operating distance of a PDDB [S ] .....................................................................2.6.4

assured release distance of a PDDB [S ] .........................................................................2.6.5

complex component .........................................................................................................2.3.4

control and monitoring device ..........................................................................................2.5.3

dangerous failure .............................................................................................................2.3.6

defined behaviour (of PDDB) ...........................................................................................2.6.1

diagnostic coverage [DC] .................................................................................................2.4.2

diagnostic test interval .....................................................................................................2.4.4

equipment under control [EUC] ........................................................................................2.4.7

failure (of equipment) .......................................................................................................2.3.5

fault .................................................................................................................................2.3.8

failures in time [FIT] ...................................................................................................... 2.3.18

hardware fault tolerance [HFT] .........................................................................................2.4.3

hardware safety integrity ..................................................................................................2.3.11

lock-out state ...................................................................................................................2.6.8

low complexity component ...............................................................................................2.3.3

mean time to dangerous failure [MTTF ] ..........................................................................2.3.17

mission time [T ] ..............................................................................................................2.6.7

mode of operation ............................................................................................................2.3.14

OFF-state ........................................................................................................................2.6.2

ON-state ..........................................................................................................................2.6.3

output signal switching device [OSSD] .............................................................................2.5.2

Performance Level [PL]....................................................................................................2.3.1

proof test .........................................................................................................................2.4.5

risk time ...........................................................................................................................2.6.6

---------------------- Page: 10 ----------------------
60947-5-3 © IEC:2013 – 9 –

safe failure .......................................................................................................................2.3.7

safe failure fraction [SFF] .................................................................................................2.4.1

safety integrity .................................................................................................................2.3.10

Safety Integrity Level [SIL] ...............................................................................................2.3.2

Safety-Related Control Function [SRCF] ..........................................................................2.3.9

safety-related system .......................................................................................................2

...

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