IEC 60730-2-23:2025
(Main)Automatic electrical controls - Part 2-23: Particular requirements for electrical sensors and sensing elements
Automatic electrical controls - Part 2-23: Particular requirements for electrical sensors and sensing elements
IEC 60730-2-23:2025 applies to the safety of electrical, electro-mechanical and electronic sensors including sensing elements and any conditioning circuitry. Sensors covered under the scope of this document serve only to transform an activating quantity into a usable output and do not perform a control operation as defined in IEC 60730-1. This document applies to sensors in so far as defining the reliability and accuracy of their inherent operating characteristics and corresponding response under normal and abnormal conditions within the sensor. Sensors, as defined herein, are used in or as part of an automatic electrical control or as independently mounted devices in connection with controls and control systems. The use of this document for other applications in which sensors are used is possible provided that the appropriate safety is maintained as defined by the end product standard. This document applies to discrete sensors constructed of, but not limited to, conductive, semi-conductive, or substrate, for the detection of activating quantities such as voltage, current, temperature, pressure, humidity, light (e.g. optical), gasoline vapours, and the like.
NOTE 1 Future consideration will be given to other sensor technologies constructed of other materials such as chemical, mechanical and micro-electromechanical systems (MEMS), along with other activating quantities like mass flow, liquid, movement, weight, vibration, or other as needed.
This document applies to sensing element(s) as well as any electronic hardware, software, or other conditioning circuits that are inherent to the sensor and relied upon to reliably transform the input signal into a useable response signal (output) for functional safety purposes. Conditioning circuits that are inseparable from the control for which the sensing element relies upon to perform its desired function are evaluated by the requirements of the relevant control Part 2 standard and/or IEC 60730-1.
NOTE 2 Additional requirements can be also applied by the application standard in which the sensor is used.
Throughout this document, whenever it is indicated that the IEC 60730-1 requirements are applicable, the term "control(s)", is replaced by the term "sensor(s)", and the term "equipment" is replaced by the term "control", as they are used in IEC 60730-1, respectively, unless otherwise specified herein.
This document does not apply to sensors explicitly described in another relevant part 2 of the IEC 60730 series.
NOTE 3 For example, a flame sensor as described in IEC 60730-2-5.
Dispositifs de commande électrique automatiques - Partie 2-23: Exigences particulières pour les capteurs électriques et les éléments sensibles
L'IEC 60730-2-23:2025 s'applique à la sécurité des capteurs électriques, électromécaniques et électroniques, y compris les éléments sensibles et les circuits de conditionnement éventuels. Les capteurs couverts par le domaine d'application du présent document permettent uniquement de transformer une grandeur de manœuvre en sortie utilisable et n'effectuent aucune opération de commande définie dans l'IEC 60730-1. Le présent document s'applique aux capteurs dans la mesure où il définit la fiabilité et l'exactitude de leurs caractéristiques de fonctionnement intrinsèques et leur réponse correspondante dans des conditions normales et anormales à l'intérieur du capteur. Les capteurs définis dans le présent document sont utilisés dans un dispositif de commande électrique automatique ou comme partie de celui-ci, ou comme des dispositifs à montage indépendant connectés à des dispositifs et systèmes de commande. L'application du présent document dans le cadre d'autres utilisations des capteurs est possible sous réserve d'assurer la sécurité adéquate, selon la définition donnée dans la norme du produit final. Le présent document s'applique aux capteurs discrets composés notamment d'un conducteur ou d'un substrat semiconducteur, pour la détection de grandeurs de manœuvre comme la tension, le courant, la température, la pression, l'humidité, la lumière (optique, par exemple), les vapeurs d'essence, etc.
NOTE 1 D'autres technologies de capteurs seront envisagées à l'avenir comme les systèmes chimiques, mécaniques et microélectromécaniques (MEMS) ainsi que d'autres grandeurs de manœuvre comme le débit massique, le liquide, le mouvement, le poids, les vibrations, etc.
Le présent document s'applique à l'élément ou aux éléments sensibles, ainsi qu'aux matériels électroniques, logiciels ou autres circuits de conditionnement qui sont intrinsèques au capteur et qui permettent de transformer de manière fiable le signal d'entrée en un signal de réponse (sortie) utilisable à des fins de sécurité fonctionnelle. Les circuits de conditionnement qui sont inséparables du dispositif de commande sur lequel repose l'élément sensible pour accomplir sa fonction souhaitée sont évalués conformément aux exigences de la Partie 2 applicable au dispositif de commande et/ou de l'IEC 60730-1.
NOTE 2 Des exigences supplémentaires peuvent également s'appliquer au titre de la norme d'application dans laquelle le capteur est utilisé.
Dans l'ensemble du présent document, s'il est indiqué que les exigences de l'IEC 60730-1 s'appliquent, le terme "dispositif(s) de commande" est remplacé par le terme "capteur(s)" et le terme "équipement" est remplacé par le terme "dispositif de commande", lorsque ces termes sont respectivement utilisés dans l'IEC 60730-1, sauf spécification contraire dans le présent document.
Le présent document ne s'applique pas aux capteurs décrits de manière explicite dans une autre partie 2 pertinente de la série IEC 60730.
NOTE 3 Par exemple, un capteur de flamme décrit dans l'IEC 60730-2-5.
General Information
Standards Content (Sample)
IEC 60730-2-23 ®
Edition 1.0 2025-05
EXTENDED VERSION
INTERNATIONAL
STANDARD
This full version of IEC 60730-2-23:2025 includes the content of the references made
to IEC 60730-1:2022
Automatic electrical controls –
Part 2-23: Particular requirements for electrical sensors and sensing elements
ICS 97.120 ISBN 978-2-8327-0437-0
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– 2 – IEC 60730-2-23:2025 EXV © IEC 2025
CONTENTS
FOREWORD . 9
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 16
3.1 Definitions relating to ratings, voltages, currents, frequencies, and wattages . 16
3.2 Definitions of types of control according to purpose . 18
3.3 Definitions relating to the function of controls . 22
3.4 Definitions relating to disconnection and interruption . 24
3.5 Definitions of types of control according to construction . 25
3.6 Definitions of type of automatic action of a control . 26
3.7 Definitions relating to protection against electric shock and type of insulation . 26
3.8 Definitions relating to component parts of controls . 30
3.9 Definitions of types of terminals and terminations of controls . 31
3.10 Definitions relating to the connections to controls . 33
3.11 Definitions relating to the performance of type 2 actions . 34
3.12 Definitions relating to the requirements for creepage distances and
clearances . 35
3.13 Miscellaneous definitions . 35
3.14 Definitions relating to manufacturer and user . 37
3.15 Definitions pertaining to thermistors . 37
3.16 Definitions relating to the structure of controls using software . 38
3.17 Definitions relating to error avoidance in controls using software . 38
3.18 Definitions relating to fault/error control techniques for controls using
software . 38
3.19 Definitions relating to memory tests for controls using software . 38
3.20 Definitions of software terminology – General . 38
3.21 Definitions relating to classes of control functions . 38
3.22 Definitions relating to functional safety . 38
3.23 Definitions related to access to data exchange . 38
3.24 Definitions related to EMC performance . 38
3.101 Definitions relating to resistance temperature detector (RTD) sensors . 41
4 General . 41
4.1 General structure of the document . 41
4.2 General requirements . 42
4.3 General notes on tests . 42
5 Required technical information . 47
5.1 General requirements . 47
5.2 Methods of providing technical information . 48
5.3 Class II symbol . 55
5.4 Additional requirements for marking . 55
5.5 Warning or cautionary markings . 57
6 Protection against electric shock . 57
6.1 General requirements . 57
6.2 Actuating members and actuating means . 59
6.3 Capacitors . 60
6.4 Covers and uninsulated live or hazardous parts . 60
6.5 Battery operated controls provided with a user accessible mains supply input
connector . 60
7 Provision for protective earthing . 61
7.1 Class 0I and Class I controls . 61
7.2 Class II and class III controls . 61
7.3 Adequacy of earth connections . 61
7.4 Corrosion resistance . 62
7.5 Other requirements . 63
7.6 Protective equipotential bonding . 63
8 Terminals and terminations . 63
8.1 Terminals and terminations for external copper conductors . 63
8.2 Terminals and terminations for internal conductors . 68
8.3 Terminals and terminations for integrated conductors . 70
9 Constructional requirements . 70
9.1 Materials . 70
9.2 Protection against electric shock . 70
9.3 Actuation and operation . 72
9.4 Actions . 73
9.5 Openings in enclosures . 75
9.6 Mounting of controls . 75
9.7 Attachment of cords . 76
9.8 Size of cords – non-detachable . 77
9.9 Inlet openings . 78
9.10 Equipment inlets and socket-outlets . 78
9.11 Requirements during mounting, use, maintenance and servicing. 78
9.12 Controls using software . 81
9.13 Protective controls and components of protective control systems . 83
10 Threaded parts and connections . 85
10.1 Threaded parts moved during mounting or servicing . 85
10.2 Current-carrying connections and connections providing protective earthing
continuity . 87
11 Creepage distances, clearances and distances through solid insulation . 88
11.1 General . 88
11.2 Clearances . 89
11.3 Creepage distances . 93
11.4 Solid insulation . 97
12 Components . 98
12.1 Transformers . 98
12.2 Switch mode power supplies and converters . 98
12.3 Capacitors . 99
12.4 Fuses. 99
12.5 Varistors . 99
12.6 Thermistors . 99
12.7 Relays . 100
12.8 Other components . 100
13 Fault assessment on electronic circuits. 100
13.1 Fault assessment for inherent safety . 100
13.2 Fault assessment to ensure functional safety . 106
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14 Moisture and dust resistance . 106
14.1 Protection against ingress of water and dust . 106
14.2 Protection against humid conditions . 107
14.3 Touch current test for in-line cord controls and free-standing controls . 108
15 Electric strength and insulation resistance . 109
15.1 Insulation resistance . 109
15.2 Electric strength . 109
15.3 Add
...
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