IEC 60947-5-2:2019

Low-voltage switchgear and controlgear - Part 5-2: Control circuit devices and switching elements - Proximity switches

IEC 60947-5-2:2019 applies to inductive and capacitive proximity switches that sense the presence of metallic and/or non-metallic objects, ultrasonic proximity switches that sense the presence of sound reflecting objects, photoelectric proximity switches that sense the presence of objects and non-mechanical magnetic proximity switches that sense the presence of objects with a magnetic field.
This fourth edition cancels and replaces the third edition published in 2007 and Amendment 1:2012. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
update of the scope;
adaptation and update of the construction requirements according to IEC Guide 116 (e.g. material requirements, artificial optical radiation, instruction requirements, hot surface, unattended operation, foreseeable misuse…);
modification of the specifications concerning the sensing range and operating distance;
new definitions for photoelectric proximity switch type D with background suppression;
integration of the requirements and test procedures of photoelectric proximity switch type D with background suppression;
update of EMC requirements in Table 9 and Table 10;
integration of environmental information requirements and environmental condition by referencing Annexes O, W and Q of IEC 60947-1:2007, IEC 60947-1:2007/AMD1:2010 and IEC 60947-1:2007/AMD2:2014;
modification of impulse withstand voltage test (5.3.1.3, 9.3.3.4.5);
modification of the references in the (normative) standard body to the (informative) Annex A;
major update of Annex A (definitions update, new dimensions and shapes);
update of C.9.1.1;
update of Annex D in order to consider new connector types and normative references;
update of Annex F (additional symbols for photoelectric proximity switches).

Appareillage à basse tension – Partie 5-2: Appareils et éléments de commutation pour circuits de commande – Détecteurs de proximité

L’IEC 60947-5-2:2019 s’applique aux détecteurs de proximité inductifs et capacitifs qui détectent la présence d’objets métalliques et/ou non métalliques, aux détecteurs de proximité ultrasoniques qui détectent la présence d’objets réfléchissant les ultrasons, aux détecteurs de proximité photoélectriques qui détectent la présence d’objets et aux détecteurs de proximité magnétiques non mécaniques qui détectent la présence d’objets avec un champ magnétique.
Cette quatrième édition annule et remplace la troisième édition parue en 2007 et l'Amendement 1:2012. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
mise à jour du domaine d’application;
adaptation et mise à jour des exigences relatives à la construction, conformément à l’IEC Guide 116 (par exemple les exigences relatives aux matériaux, le rayonnement optique artificiel, les exigences relatives aux instructions, les surfaces chaudes, le fonctionnement sans surveillance, les cas prévisibles d’usage inapproprié…);
modification des spécifications concernant le domaine de détection et la portée;
nouvelles définitions pour le détecteur de proximité photoélectrique de type D à effacement d’arrière-plan;
intégration des exigences et des modes opératoires d’essai relatifs au détecteur de proximité photoélectrique de type D à effacement d’arrière-plan;
mise à jour des exigences de CEM dans le Tableau 9 et le Tableau 10;
intégration des exigences relatives aux données d’environnement et aux conditions d’environnement, en faisant référence aux Annexes O, W et Q de l’IEC 60947-1:2007, l’IEC 60947-1:2007/AMD1:2010 et l’IEC 60947-1:2007/AMD2:2014;
modification de l’essai de tension assignée de tenue aux chocs (5.3.1.3, 9.3.3.4.5);
modification du statut normatif des références données dans l’Annexe A, devenant une annexe informative;
mise à jour majeure de l’Annexe A (mise à jour des définitions, nouvelles dimensions et formes);
mise à jour de C.9.1.1;
mise à jour de l’Annexe D afin de tenir compte des nouveaux types de connecteurs et des nouvelles références normatives;
mise à jour de l’Annexe F (ajout de symboles pour les détecteurs de proximité photoélectriques).

General Information

• Status: Published
• Publication Date: 17-Oct-2019
• ICS: 29.120.40 - Switches
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• Technical Committee: SC 121A - Low-voltage switchgear and controlgear
• Drafting Committee: WG 3 - TC 121/SC 121A/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 18-Oct-2019
• Completion Date: 25-Oct-2019

Relations

• Revises: IEC 60947-5-2:2007 - Low-voltage switchgear and controlgear - Part 5-2: Control circuit devices and switching elements - Proximity switches
• Effective Date: 05-Sep-2023
• Revises: IEC 60947-5-2:2007/AMD1:2012 - Amendment 1 - Low-voltage switchgear and controlgear - Part 5-2: Control circuit devices and switching elements - Proximity switches
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60947-5-2 ®
Edition 4.0 2019-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage switchgear and controlgear –
Part 5-2: Control circuit devices and switching elements – Proximity switches

Appareillage à basse tension –
Partie 5-2: Appareils et éléments de commutation pour circuits de commande –
Détecteurs de proximité
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IEC 60947-5-2 ®
Edition 4.0 2019-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage switchgear and controlgear –

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

Appareillage à basse tension –

Partie 5-2: Appareils et éléments de commutation pour circuits de commande –

Détecteurs de proximité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.40; 29.130.20 ISBN 978-2-8322-7445-3

– 2 – IEC 60947-5-2:2019 © IEC 2019
CONTENTS
FOREWORD . 9
1 Scope . 12
2 Normative references . 13
3 Terms and definitions . 14
3.1 Basic terms and definitions . 17
3.2 Parts of a proximity switch . 18
3.3 Operation of a proximity switch . 20
3.4 Switching element characteristics . 22
4 Classification . 24
4.1 General . 24
4.2 Classification according to sensing means . 26
4.3 Classification according to the mechanical installation . 26
4.4 Classification according to the construction form and size . 26
4.5 Classification according to switching element function . 26
4.6 Classification according to type of output . 26
4.7 Classification according to method of connection . 26
5 Characteristics . 26
5.1 General . 26
5.1.1 Summary of characteristics . 26
5.1.2 Operation of an inductive or capacitive proximity switch . 26
5.1.3 Operation of an ultrasonic proximity switch . 27
5.1.4 Operation of a photoelectric proximity switch . 27
5.1.5 Operation of a magnetic proximity switch . 27
5.2 Operating conditions . 27
5.2.1 Operating conditions of inductive and capacitive proximity switches . 27
5.2.2 Operating distance (s) of an ultrasonic proximity switch . 28
5.2.3 Operating distance (s) of a photoelectric proximity switch . 29
5.3 Rated and limiting values for the proximity switch and switching element(s) . 31
5.3.1 Voltages . 31
5.3.2 Currents . 31
5.3.3 Rated supply frequency . 32
5.3.4 Frequency of operating cycles (f) . 32
5.3.5 Normal load and abnormal load characteristics . 32
5.3.6 Short-circuit characteristics . 32
5.4 Utilization categories for the switching element . 32
6 Product information . 33
6.1 Nature of information – Identification . 33
6.2 Marking . 34
6.2.1 General . 34
6.2.2 Terminal identification and marking . 34
6.2.3 Functional markings. 34
6.3 Instructions for installation, operation and maintenance . 34
6.4 Environmental information . 35
6.4.1 Environmentally conscious design process (ECD process) . 35

6.4.2 Procedure to establish material declaration . 35
7 Normal service, mounting and transport conditions . 35
7.1 Normal service conditions . 35
7.1.1 General . 35
7.1.2 Ambient air temperature . 35
7.1.3 Altitude . 36
7.1.4 Climatic conditions . 36
7.2 Conditions during transport and storage . 36
7.3 Mounting . 36
8 Constructional and performance requirements . 36
8.1 Constructional requirements . 36
8.1.1 Materials . 36
8.1.2 Current-carrying parts and their connections . 37
8.1.3 Clearances and creepage distances . 38
8.1.4 Actuation . 38
8.1.5 Void . 38
8.1.6 Void . 38
8.1.7 Terminals . 38
8.1.8 Void . 40
8.1.9 Provisions for protective earthing . 40
8.1.10 Degree of protection . 40
8.1.11 Requirements for proximity switches with integrally connected cables . 40
8.1.12 Class II proximity switches . 41
8.1.13 Chemical stress . 41
8.1.14 Equipment design . 41
8.1.15 Protection against artificial optical radiation . 41
8.1.16 Biological and chemical effects . 42
8.1.17 Unattended operation . 42
8.1.18 Safety related security . 42
8.1.19 Requirements for embedded software . 42
8.2 Performance requirements . 42
8.2.1 Operating conditions . 42
8.2.2 Temperature-rise . 46
8.2.3 Dielectric properties . 47
8.2.4 Ability to make and break under normal load and abnormal load
conditions . 48
8.2.5 Conditional short-circuit current . 49
8.2.6 Electromagnetic compatibility (EMC) . 49
8.3 Physical dimensions . 53
8.4 Shock and vibration and special environmental conditions . 53
8.4.1 Shock . 53
8.4.2 Vibration . 53
8.4.3 Results to be obtained . 53
8.4.4 Special environmental conditions – damp heat, salt mist, vibration and
shock . 54
9 Tests . 54
9.1 Kinds of tests . 54
9.1.1 General . 54
9.1.2 Type tests . 54

– 4 – IEC 60947-5-2:2019 © IEC 2019
9.1.3 Routine tests . 54
9.1.4 Sampling tests . 54
9.1.5 Special tests . 54
9.2 Compliance with constructional requirements . 55
9.2.1 General . 55
9.2.2 Materials . 55
9.3 Performances . 55
9.3.1 Test sequences . 55
9.3.2 General test conditions . 56
9.3.3 Performance under no load, normal load and abnormal load condition . 58
9.3.4 Performance under short-circuit current conditions . 64
9.4 Testing of operating distances . 65
9.4.1 Inductive, capacitive, non-mechanical magnetic and ultrasonic proximity
switches . 65
9.4.2 Photoelectric proximity switches . 66
9.5 Testing for the frequency of operating cycles . 69
9.5.1 General . 69
9.5.2 Method for measuring the frequency of operating cycles . 70
9.5.3 Results to be obtained . 72
9.5.4 Photoelectric proximity switches . 72
9.6 Verification of the electromagnetic compatibility . 74
9.6.1 General . 74
9.6.2 Immunity . 74
9.6.3 Emission . 75
9.7 Test results and test report . 75
Annex A (informative) Typical dimensions and operating distances of proximity
switches. 76
A.1 MODEL IA, IB – INDUCTIVE CYLINDRICAL PROXIMITY SWITCHES WITH
THREADED BARREL (IA) OR SMOOTH BARREL (IB) WITH CABLE OR
CONNECTOR . 76
A.1.1 (IA, IB) Dimensions . 76
A.1.2 (IA, IB) Rated operating distances . 79
A.1.3 (IA, IB) Installation (mounting) threaded barrel (IA) and smooth barrel
(IB) . 80
A.1.4 (IA, IB) Frequency of operating cycles (f) . 80
A.2 MODEL IC – INDUCTIVE RECTANGULAR PROXIMITY SWITCHES WITH
SQUARE CROSS-SECTION . 81
A.2.1 (IC) Dimensions . 81
A.2.2 (IC) Rated operating distance . 83
A.2.3 (IC) Installation (mounting) . 84
A.2.4 (IC) Frequency of operating cycles (f) . 85
A.3 MODEL ID – INDUCTIVE RECTANGULAR PROXIMITY SWITCHES WITH
RECTANGULAR CROSS-SECTION . 86
A.3.1 (ID) Dimensions . 86
A.3.2 (ID) Installation (mounting) . 87
A.3.3 (IC) Frequency of operating cycles (f) . 88
A.4 MODEL IX (IN, IS, FLATPACK, CUBICAL INDUCTIVE RECTANGULAR AND
CUBICAL PROXIMITY SWITCHES WITH SMALL SIZES) . 88

A.4.1 (IX) Dimensions . 88
A.4.2 (Flatpack) Dimensions . 89
A.4.3 (Cubical) Dimensions . 90
A.4.4 (IX) Rated operating distance . 92
A.4.5 (IX) Installation (mounting) . 92
A.4.6 (IX) Frequency of operating cycles (f) . 92
A.5 MODEL CA – CAPACITIVE CYLINDRICAL PROXIMITY SWITCHES WITH
THREADED BARREL . 93
A.5.1 (CA) Dimensions . 93
A.5.2 (CA) Rated operating distance (s ) . 94
n
A.5.3 (CA) Installation (mounting) . 94
A.5.4 (CA) Frequency of operating cycles (f) . 95
A.6 MODEL CB – CAPACITIVE PROXIMITY SWITCHES WITH SMOOTH
BARREL . 95
A.7 MODEL CC – CAPACITIVE RECTANGULAR PROXIMITY SWITCHES WITH
SQUARE CROSS-SECTION . 95
A.7.1 (CC) Dimensions . 95
A.7.2 (CC) Rated operating distances (s ) . 96
n
A.7.3 (CC) Installation (mounting) . 97
A.7.4 (CC) Frequency of operating cycles (f) . 97
A.8 MODEL CD – CAPACITIVE RECTANGULAR PROXIMITY SWITCHES WITH
RECTANGULAR CROSS-SECTION . 98
A.8.1 (CD) Dimensions . 98
A.8.2 (CD) Rated operating distance (s ) . 98
n
A.8.3 (CD) Installation (mounting) . 98
A.8.4 (CD) Frequency of operating cycles (f) . 99
A.9 MODEL CX – CAPACITIVE PROXIMITY SWITCHES WITH OTHER FORMS,
DIMENSIONS AND SMALL SIZES . 99
A.10 MODEL UA – THREADED BARREL ULTRASONIC CYLINDRICAL
PROXIMITY SWITCHES . 99
A.10.1 (UA) Dimensions . 99
A.10.2 (UA) Sensing range . 100
A.10.3 (UA) Installation (mounting) . 100
A.10.4 (UA) Frequency of operating cycles (f) . 100
A.11 MODEL UD – ULTRASONIC RECTANGULAR PROXIMITY SWITCHES
WITH RECTANGULAR CROSS-SECTION . 101
A.11.1 (UD) Dimensions . 101
A.11.2 (UD) Sensing range . 101
A.11.3 (UD) Installation (mounting) . 101
A.11.4 (UD) Frequency of operating cycles (f) . 101
Annex B (normative) Class II proximity switches insulated by encapsulation –
Requirements and tests . 102
B.1 General . 102
B.2 Terms and definitions . 102
B.6 Marking . 102
B.8 Constructional and functional requirements . 103
B.9 Tests . 103
Annex C (normative) Additional requirements for proximity switches with integrally
connected cables . 106
C.1 General . 106

– 6 – IEC 60947-5-2:2019 © IEC 2019
C.2 Terms and definitions . 106
C.8 Constructional and performance requirements . 106
C.9 Tests . 107
Annex D (normative) Integral connectors for plug-in proximity switches . 111
Annex E (normative) Additional requirements for proximity switches suitable for use in
strong magnetic fields . 119
E.1 Preamble . 119
E.3 Terms and definitions . 119
E.4 Classification . 119
E.8 Construction and performance requirements . 120
E.9 Tests . 121
Annex F (informative) Symbols for proximity switches . 124
F.1 General . 124
F.2 Standard symbols for proximity switches . 124
F.3 Additional symbols for photoelectric proximity switches . 126
F.3.1 Sensor principles . 126
F.3.2 Optical actuation means . 126
F.3.3 Functional symbol definitions . 126
Bibliography . 128

Figure 1 – Relationship between operating distances of inductive and capacitive
proximity switches (see 8.2.1.3 and 9.4.1) . 28
Figure 2 – Ultrasonic proximity switch operating distances . 28
Figure 3 – Relationship between operating distances of ultrasonic proximity switches
(see 8.2.1.3 and 9.4.1) . 29
Figure 4 – Sensing range and operating range of photoelectric proximity switches (see
8.2.1.3 and 9.4) . 30
Figure 5 – Relationship between U and U . 31
e B
Figure 6 – Method of measuring the operating distance (see 9.3.2.1 and 9.4.1) . 57
Figure 7 – Test circuit for the verification of time delay before availability (see 8.2.1.7
and 9.3.3.2.1) . 59
Figure 8 – Signal output across load in Figure 7 (see 9.3.3.2.1) . 60
Figure 9 – Test circuit for the verification of minimum operational current OFF-state
current, voltage drop and independent action (see 9.3.3.2.2, 9.3.3.2.3, 9.3.3.2.4 and
9.3.3.2.5) . 61
Figure 10 – Test circuit for the verification of making and breaking capability (see
9.3.3.5) . 64
Figure 11 – Short-circuit testing (see 9.3.4.2) . 65
Figure 12 – Testing of the sensing range (see 9.4.2) . 68
Figure 13 – Methods for measuring the frequency of operating cycle of inductive,
capacitive and non-mechanical magnetic proximity switches (if applicable) . 70
Figure 14 – Methods for measuring the frequency of operating cycles (f), ultrasonic
proximity switch . 71
Figure 15 – Output signal of direct current proximity switch during the measurement of
frequency of operating cycles (f) . 71
Figure 16 – Measurement means for turn-on time t and turn-off time t . 72
on off
Figure 17 – Turn-on time t measurement . 73
on
Figure 18 – Turn-off time t measurement . 73
off
Figure A.1 – (IA) – Dimensions for threaded barrel – cable type . 76
Figure A.2 – (IB) – Dimensions for smooth barrel – cable type . 77
Figure A.3 – Type A dimensions – Body M5x0,5, M8x1, Ø 4, Ø 6,5 with connector
M5/M8 . 78
Figure A.4 – Type B dimensions – Body M5x0,5, M8x1, Ø 4, Ø 6,5 with connector
M8/M12 . 78
Figure A.5 – Type C dimensions – Body M12x1, M18x1, M30x1,5 with connector M12 . 79
a
Figure A.6 – (IA, IB) – Installation (mounting) . 80
Figure A.7 – Dimensions of Type I1C26 (in millimetres) . 82
Figure A.8 – Dimensions of Types I2C40 and I1C40 (in millimetres) . 82
Figure A.9 – Dimensions of Types I2IMC and I1IMC (IMC) 40 x 40 (cube) . 83
Figure A.10 – Installation of a I1C proximity switch in damping material . 84
a
Figure A.11 – (IC) Installation of I2C in damping material . 85
Figure A.12 – (ID) Dimensions . 86
Figure A.13 – (IDC) Dimensions . 87
Figure A.14 – (ID) Installation in damping material . 88
Figure A.15 – (IN) with cable or connector M8 entry . 89
Figure A.16 – (IS) with cable or connector M8 entry . 89
Figure A.17 – (Flatpack) with cable or connector M8 entry . 90
Figure A.18 – (5 mm x 5 mm) Cubical with cable. 91
Figure A.19 – (8 mm x 8 mm) Cubical with cable. 91
Figure A.20 – (8 mm x 8 mm) Cubical with M8 connector . 92
Figure A.21 – (CA) Dimensions . 93
Figure A.22 – (CA) Installation (mounting) . 95
Figure A.23 – Model CC Dimensions . 96
Figure A.24 – (CC) Installation (mounting) . 97
Figure A.25 – (CD) Dimensions in millimetres . 98
Figure A.26 – (CD) Installation (mounting) . 99
Figure A.27 – (UA) Dimensions . 100
Figure A.28 – (UD) Dimensions of Type D80 . 101
Figure B.1 – Encapsulated device . 103
Figure B.2 – Test device . 105
Figure D.1 – M12 thread 3-pin integral connector for AC proximity switches . 111
Figure D.2 – M12 thread 5-pin integral connector for DC proximity switches . 112
Figure D.3 – 8 mm thread 3-pin integral connector for DC proximity switches . 113
Figure D.4 – 8 mm thread 4-pin integral connector for DC proximity switches . 114
Figure D.5 – M12 thread 4-pin integral connector for AC proximity switches . 115
Figure D.6 – M12 thread 5-pin integral connector for AC proximity switches . 116
Figure D.7 – M12 thread 6-pin integral connector for AC proximity switches . 117
Figure D.8 – M5 thread 4-pin/3-pin integral connector for DC proximity switches . 118
Figure E.1 – Examples of test configuration for verification of the immunity to an
alternating field . 122

– 8 – IEC 60947-5-2:2019 © IEC 2019
Figure E.2 – Example of test configuration for verification of the immunity in a constant
magnetic field . 123
Figure F.1 – Examples of symbols for proximity switches . 125
Figure F.2 – Examples of symbols for proximity switches . 127

Table 1 – Classification of proximity switches . 25
Table 2 – Cross reference between active optical signal and output function . 27
Table 3 – Utilization categories for switching elements . 33
Table 4 –Test conditions for glow-wire test . 37
Table 5 – Connection and wiring identification . 39
Table 6 – Burn threshold . 47
Table 7 – Verification of making and breaking capacities of switching elements under
a
normal conditions corresponding to the utilization categories . 48
Table 8 – Verification of making and breaking capacities of switching elements under
a
abnormal conditions corresponding to the utilization categories . 49
Table 9 – Acceptance criteria . 50
Table 10 – Immunity tests (1 of 2) . 51
Table 11 – Target sizes of ultrasonic proximity switches . 57
Table 12 – Test voltages . 63
Table A.1 – (IA, IB) – Preferred and secondary series smooth and threaded barrel
cable types . 77
Table A.2 – (IA) – Dimensions of nuts . 77
Table A.3 – (Types A, B, C) – Preferred and secondary series, smooth and threaded
barrel connector types . 79
Table A.4 – (IA, IB) – Rated operating distances . 80
Table A.5 – (IA, IB) – Frequency of operating cycles (f) in operating cycles per second
– Minimum requirements . 81
Table A.6 – (IC) – Rated operating distance . 84
Table A.7 – (IC) – Frequency of operating cycles (f) in operating cycles per second –
Minimum requirements . 85
Table A.8 – (ID) – Dimensions . 86
Table A.9 – (IC) – Frequency of operating cycles (f) in operating cycles per second –
Minimum requirements . 88
Table A.10 – (IX) – Rated operating distances IN, IS, flatpack, cubical . 92
Table A.11 – (IX) – Frequency of operating cycles IN, IS, flatpack and cubical (f) in
operating cycles per second . 93
Table A.12 – (CA) – Dimensions . 94
Table A.13 – (CA) – Rated operating distances . 94
Table A.14 – (CC) – Rated operational distance . 97
Table A.15 – (UA) – Dimensions . 100
Table C.1 – Material characteristics . 107
Table C.2 – Examples of standard cable types . 108
Table C.3 – Tensile forces . 109

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 5-2: Control circuit devices and switching elements –
Proximity switches
FOREWORD
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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 e
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