IEC 60947-5-5:1997

NORME CEI
INTERNATIONALE IEC
60947-5-5
INTERNATIONAL
Edition 1.1
STANDARD
2005-04
Edition 1:1997 consolidée par l'amendement 1:2005
Edition 1:1997 consolidated with amendment 1:2005
Appareillage à basse tension –
Partie 5-5:
Appareils et éléments de commutation
pour circuits de commande –
Appareil d'arrêt d'urgence électrique
à accrochage mécanique
Low-voltage switchgear and controlgear –
Part 5-5:
Control circuit devices and switching elements –
Electrical emergency stop device with mechanical
latching function
Numéro de référence
Reference number
CEI/IEC 60947-5-5:1997+A1:2005

Numérotation des publications Publication numbering
Depuis le 1er janvier 1997, les publications de la CEI As from 1 January 1997 all IEC publications are
sont numérotées à partir de 60000. Ainsi, la CEI 34-1 issued with a designation in the 60000 series. For
devient la CEI 60034-1. example, IEC 34-1 is now referred to as IEC 60034-1.
Editions consolidées Consolidated editions
Les versions consolidées de certaines publications de la The IEC is now publishing consolidated versions of its
CEI incorporant les amendements sont disponibles. Par publications. For example, edition numbers 1.0, 1.1
exemple, les numéros d’édition 1.0, 1.1 et 1.2 indiquent and 1.2 refer, respectively, to the base publication,
respectivement la publication de base, la publication de the base publication incorporating amendment 1 and
base incorporant l’amendement 1, et la publication de the base publication incorporating amendments 1
base incorporant les amendements 1 et 2. and 2.
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NORME CEI
INTERNATIONALE IEC
60947-5-5
INTERNATIONAL
Edition 1.1
STANDARD
2005-04
Edition 1:1997 consolidée par l'amendement 1:2005
Edition 1:1997 consolidated with amendment 1:2005
Appareillage à basse tension –
Partie 5-5:
Appareils et éléments de commutation
pour circuits de commande –
Appareil d'arrêt d'urgence électrique
à accrochage mécanique
Low-voltage switchgear and controlgear –
Part 5-5:
Control circuit devices and switching elements –
Electrical emergency stop device with mechanical
latching function
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Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
CF
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
Международная Электротехническая Комиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

– 2 – 60947-5-5 © CEI:1997+A1:2005
SOMMAIRE
AVANT-PROPOS.4
INTRODUCTION .8

1 Domaine d'application .10
2 Références normatives.10
3 Définitions.12
4 Marquage et information sur le produit.16
4.1 Généralités .16
4.2 Indications sur les boutons .16
4.3 Prescriptions supplémentaires pour les interrupteurs à commande par câble.18
4.4 Prescriptions supplémentaires pour le code des couleurs.18
5 Prescriptions électriques .18
6 Prescriptions mécaniques.18
6.1 Prescriptions générales .18
6.2 Verrouillage.20
6.3 Prescriptions supplémentaires pour appareil d'arrêt d'urgence à bouton.20
6.4 Prescriptions supplémentaires pour les interrupteurs à commande par câble.20
6.5 Prescriptions supplémentaires pour les interrupteurs à pied.22
7 Essai de la conception mécanique .22
7.1 Généralités .22
7.2 Examen général de la conception .24
7.3 Essais de fonctionnement.24
7.4 Procédures de conditionnement.26
7.5 Essais de chocs .26
7.6 Essais de vibrations .26
7.7 Essais de verrouillage, de réarmement et de choc .28
7.8 Essais divers.32

Annexe A (Suppriméé).34

Figure 1 – Marteau pour les essais .30

Tableau 1 – Robustesse d’un organe de commande à bouton .24
Tableau 2 – Relation entre le trou de montage de l’arrêt d’urgence
et la hauteur du marteau.30

60947-5-5 © IEC:1997+A1:2005 – 3 –
CONTENTS
FOREWORD .5
INTRODUCTION .9

1 Scope .11
2 Normative references .11
3 Definitions.13
4 Marking and product information.17
4.1 General .17
4.2 Indications on buttons .17
4.3 Additional requirements for trip wire switches .19
4.4 Additional requirements for colour coding .19
5 Electrical requirements .19
6 Mechanical requirements.19
6.1 General requirements .19
6.2 Latching .21
6.3 Additional requirements for button type emergency stop device.21
6.4 Additional requirements for trip wire switches .21
6.5 Additional requirement for footswitches.23
7 Testing of the mechanical design.23
7.1 General .23
7.2 General design inspection .25
7.3 Operating tests.25
7.4 Conditioning procedures.27
7.5 Shock test .27
7.6 Vibration tests .27
7.7 Latching, resetting and impact tests.29
7.8 Miscellaneous tests .33

Annex A (Deleted) .35

Figure 1 – Hammer for tests .31

Table 1 – Robustness of a button type actuator.25
Table 2 – Relationship between the emergency stop mounting hole
and the hammer height .31

– 4 – 60947-5-5 © CEI:1997+A1:2005
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
APPAREILLAGE A BASSE TENSION –

Partie 5-5: Appareils et éléments de commutation
pour circuits de commande –
Appareil d'arrêt d'urgence électrique à accrochage mécanique

AVANT-PROPOS
1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation composée
de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a pour objet de
favoriser la coopération internationale pour toutes les questions de normalisation dans les domaines de
l'électricité et de l'électronique. A cet effet, la CEI – entre autres activités – publie des Normes internationales,
des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au public (PAS) et des
Guides (ci-après dénommés "Publication(s) de la CEI"). Leur élaboration est confiée à des comités d'études,
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responsable de ne pas avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.
La Norme internationale CEI 60947-5-5 a été établie par le sous-comité 17B: Appareillage à
basse tension, du comité d'études 17 de la CEI: Appareillage.
La présente version consolidée de la CEI 60947-5-5 comprend la première édition (1997)
[documents 17B/837/FDIS et 17B/856/RVD] et son amendement 1 (2005) [documents
17B/1389/FDIS et 17B/1399/RVD].
Le contenu technique de cette version consolidée est donc identique à celui de l'édition de
base et à son amendement; cette version a été préparée par commodité pour l'utilisateur.
Elle porte le numéro d'édition 1.1.
Une ligne verticale dans la marge indique où la publication de base a été modifiée par
l'amendement 1.
60947-5-5 © IEC:1997+A1:2005 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 5-5: Control circuit devices and switching elements –
Electrical emergency stop device with mechanical latching function

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60947-5-5 has been prepared by subcommittee 17B: Low-voltage
switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.
This consolidated version of IEC 60947-5-5 consists of the first edition (1997) [documents
17B/837/FDIS and 17B/856/RVD] and its amendment 1 (2005) [documents 17B/1389/FDIS and
17B/1399/RVD].
The technical content is therefore identical to the base edition and its amendment and has
been prepared for user convenience.
It bears the edition number 1.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
– 6 – 60947-5-5 © CEI:1997+A1:2005
La présente norme doit être utilisée conjointement avec la CEI 60947-1 et la CEI 60947-5-1.
Le comité a décidé que le contenu de la publication de base et de ses amendements ne sera
pas modifié avant la date de maintenance indiquée sur le site web de la CEI sous
"http://webstore.iec.ch" dans les données relatives à la publication recherchée. A cette date,
la publication sera
• reconduite,
• supprimée,
• remplacée par une édition révisée, ou
• amendée.
Le contenu du corrigendum de juillet 2007 a été pris en considération dans cet exemplaire.

60947-5-5 © IEC:1997+A1:2005 – 7 –
This standard should be used in conjunction with IEC 60947-1 and IEC 60947-5-1.
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 8 – 60947-5-5 © CEI:1997+A1:2005
INTRODUCTION
La présente CEI 60947-5-5 traite spécifiquement des appareils d'arrêt d'urgence électriques
avec fonction mécanique de verrouillage et donne des prescriptions électriques et
mécaniques complémentaires à celles données dans les normes internationales suivantes:
– l’ISO 13850 donnant des prescriptions pour la fonction d'arrêt d'urgence d'une machine
quelle que soit l'énergie utilisée;
– la CEI 60204-1 donnant des prescriptions supplémentaires pour une fonction d'arrêt
d'urgence réalisé par l'équipement électrique d'une machine;
– la CEI 60947-5-1 spécifiant les caractéristiques électriques des appareils électro-
mécaniques pour circuits de commande.

60947-5-5 © IEC:1997+A1:2005 – 9 –
INTRODUCTION
The present IEC 60947-5-5 deals specifically with electrical emergency stop devices with
mechanical latching function and gives additional electrical and mechanical requirements to
those given in the following International Standards:
– ISO 13850 giving requirements for the emergency stop function of a machine, whatever
be the energy used;
– IEC 60204-1 giving additional requirements for an emergency stop function realized by
the electrical equipment of a machine;
– IEC 60947-5-1 specifying electrical characteristics of electromechanical control circuit
devices.
– 10 – 60947-5-5 © CEI:1997+A1:2005
APPAREILLAGE A BASSE TENSION –

Partie 5-5: Appareils et éléments de commutation
pour circuits de commande –
Appareil d'arrêt d'urgence électrique à accrochage mécanique

1 Domaine d'application
La présente section de la CEI 60947-5 donne des spécifications détaillées concernant la
construction électrique et mécanique des appareils d'arrêt d'urgence à accrochage
mécanique et leurs essais.
La présente norme est applicable aux appareils pour circuit de commande électrique et aux
éléments de commutation qui sont utilisés afin de provoquer un signal d'arrêt d'urgence.
De tels appareils peuvent être soit des appareils équipés de leur propre enveloppe, soit des
appareils montés selon les instructions du constructeur.
Cette norme ne s'applique pas aux:
– appareils d'arrêt d'urgence pour circuit de commande non électrique par exemple
hydraulique, pneumatique;
– appareils d'arrêt d'urgence sans accrochage mécanique.
Un appareil d'arrêt d'urgence peut également être utilisé pour fournir une fonction de coupure
d'urgence (voir annexe A).
2 Références normatives
Les documents de référence suivants sont indispensables pour l'application du présent
document. Pour les références datées, seule l'édition citée s'applique. Pour les références
non datées, la dernière édition du document de référence s'applique (y compris les éventuels
amendements).
CEI 60050(441):1984, Vocabulaire Electrotechnique International (VEI) – Chapitre 441:
Appareillage et fusibles
Amendement 1 (2000)
CEI 60068-2-1:1990, Essais d'environnement – Partie 2: Essais – Essais A: Froid
Amendement 1 (1993)
Amendement 2 (1994)
CEI 60068-2-2:1974, Essais d'environnement – Partie 2: Essais – Essai B: Chaleur sèche
Amendement 1 (1993)
Amendement 2 (1994)
CEI 60068-2-6:1995, Essais d'environnement – Partie 2: Essais – Essais Fc: Vibrations
(sinusoïdales)
CEI 60068-2-11:1981, Essais d'environnement – Partie 2: Essais – Essai Ka: Brouillard salin

60947-5-5 © IEC:1997+A1:2005 – 11 –
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 5-5: Control circuit devices and switching elements –
Electrical emergency stop device with mechanical latching function

1 Scope
This section of IEC 60947-5 provides detailed specifications relating to the electrical and
mechanical construction of emergency stop devices with mechanical latching function and to
their testing.
This standard is applicable to electrical control circuit devices and switching elements which
are used to initiate an emergency stop signal. Such devices may be either provided with their
own enclosure, or installed according to the manufacturer's instructions.
This standard does not apply to:
– emergency stop devices for non-electrical control circuit, for example hydraulic,
pneumatic;
– emergency stop devices without mechanical latching function.
An emergency stop device may also be used to provide an emergency switching off function
(see annex A).
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 60050(441):1984, International Electrotechnical Vocabulary (IEV) – Chapter 441:
Switchgear, controlgear, fuses
Amendment 1 (2000)
IEC 60068-2-1:1990, Environmental testing – Part 2: Tests – Test A: Cold
Amendment 1 (1993)
Amendment 2 (1994)
IEC 60068-2-2:1974, Environmental testing – Part 2: Tests – Test B: Dry heat
Amendment 1 (1993)
Amendment 2 (1994)
IEC 60068-2-6:1995, Environmental testing – Part 2: Tests – Test Fc: Vibration (sinusoidal)
IEC 60068-2-11:1981, Environmental testing – Part 2: Tests – Test Ka: Salt mist

– 12 – 60947-5-5 © CEI:1997+A1:2005
CEI 60068-2-27:1987, Essais d'environnement – Partie 2: Essais – Essai Ea et guide: Chocs
CEI 60068-2-30:1980, Essais d'environnement – Partie 2: Essais – Essai Db et guide: Essai
cyclique de chaleur humide (cycle de 12 + 12 heures)
Amendement 1 (1985)
CEI 60073:2002, Principes fondamentaux et de sécurité pour l’interface homme-machine, le
marquage et l’identification – Principes de codage pour les dispositifs indicateurs et les
organes de commande
CEI 60204-1:1997, Sécurité des machines – Equipement électrique des machines – Partie 1:
Règles générales
Amendement 1 (1999)
CEI 60721-3-3:1994, Classification des conditions d'environnement – Partie 3: Classification
des groupements des agents d'environnement et de leurs sévérités – Utilisation à poste fixe,
protégé contre les intempéries
Amendement 1 (1995)
Amendement 2 (1996)
CEI 60947-1:2004, Appareillage à basse tension – Partie 1: Règles générales
CEI 60947-5-1:2003, Appareillage à basse tension – Partie 5-1: Appareils et éléments de com-
mutation pour circuits de commande – Appareils électromécaniques pour circuits de commande
CEI 61310-1:1995, Sécurité des machines – Indication, marquage et manoeuvre – Partie 1:
Spécifications pour les signaux visuels, audibles et tactiles
ISO 3864:1984, Couleurs et signaux de sécurité
ISO 13850:1996, Sécurité des machines – Arrêt d’urgence – Principes de conception
3 Définitions
Pour les besoins de la présente section de la CEI 60947-5, les définitions de la CEI 60947-1
et de la CEI 60947-5-1 s'appliquent, ainsi que les définitions complémentaires suivantes.
Référence
A
Appareil d’arrêt d’urgence. 3.2
Arrêt d’urgence (fonction ou signal). 3.1

I
Interrupteur à commande par câble. 3.10

M
Manœuvre positive d’ouverture (d’un élément de contact). 3.9

O
Organe de commande (d’un appareil d’arrêt d’urgence) . 3.4

P
Position activée. 3.6
Position de repos. 3.5

60947-5-5 © IEC:1997+A1:2005 – 13 –
IEC 60068-2-27:1987, Environmental testing – Part 2: Tests – Test Ea and guidance: Shock
IEC 60068-2-30:1980, Environmental testing – Part 2: Tests – Test Db and guidance: Damp
heat, cyclic (12+12-hour cycle)
Amendment 1 (1985)
IEC 60073:2002, Basic and safety principles for man-machine interface, marking and
identification – Coding principles for indicators and actuators
IEC 60204-1:1997, Safety of machinery – Electrical equipment of machines – Part 1: General
requirements
Amendment 1 (1999)
IEC 60721-3-3:1994, Classification of environmental conditions – Part 3: Classification of
groups of environmental parameters and their severities – Section 3: Stationary use at
weather protected location
Amendment 1 (1995)
Amendment 2 (1996)
IEC 60947-1:2004, Low-voltage switchgear and controlgear – Part 1: General rules
IEC 60947-5-1:2003, Low-voltage switchgear and controlgear – Part 5-1: Control circuit
devices and switching elements – Electromechanical control circuit devices
IEC 61310-1:1995, Safety of machinery – Indication, marking and actuation – Part 1:
Requirements for visual, auditory and tactile signals
ISO 3864:1984, Safety colours and safety signs
ISO 13850:1996, Safety of machinery – Emergency stop – Principles for design
3 Definitions
For the purpose of this section of IEC 60947-5, the following definitions apply in addition to
those given in IEC 60947-1 and in IEC 60947-5-1.
Reference
A
Actuated position. 3.6
Actuating system (of an emergency stop device) . 3.3
Actuator (of an emergency stop device). 3.4

D
Direct opening action (positive opening action) (of a contact element) . 3.9

E
Emergency stop (function or signal). 3.1
Emergency stop device. 3.2

L
Latching (of an emergency stop device). 3.7

– 14 – 60947-5-5 © CEI:1997+A1:2005
R
Réarmement (d’un appareil d’arrêt d’urgence). 3.8

S
Système de commande (d’un appareil d’arrêt d’urgence). 3.3

V
Verrouillage (d’un appareil d’arrêt d’urgence). 3.7

3.1
arrêt d'urgence (fonction ou signal): Fonction ou signal prévu:
– pour éviter ou réduire des risques (phénomènes dangereux), pouvant porter atteinte à
des personnes, à la machine ou au travail en cours;
– pour être déclenchée par une action humaine unique.
[ISO/CEI 13850: 3.1, modifiée]
3.2
appareil d'arrêt d'urgence
appareil pour circuit de commande manoeuvré manuellement et utilisé pour provoquer un
arrêt d'urgence
[ISO/CEI 13850: 3.2 modifiée]
NOTE Un appareil d'arrêt d'urgence peut également fournir des fonctions auxiliaires, par exemple redondance
et/ou signal par un ou des éléments de contact supplémentaire. Ce ou ces contacts peuvent être normalement
ouverts et/ou normalement fermés.
3.3
système de commande (d'un appareil d'arrêt d'urgence)
pièces mécaniques transmettant la force de commande aux éléments de contact
[VEI 441-15-21 modifiée]
3.4
organe de commande (d'un appareil d'arrêt d'urgence)
partie du système de commande qui est manoeuvrée par une partie du corps humain
[VEI 441-15-22 modifiée]
NOTE 1 L'organe de commande peut être par exemple un bouton, un câble, une corde, une barre ou une pédale.

3.5
position de repos
position d'un appareil d'arrêt d'urgence, ou d'une partie de celui-ci, qui n'a pas été
manoeuvré
NOTE En position repos, la machine (ou le matériel) peut fonctionner.
3.6
position activée
position d'un appareil d'arrêt d'urgence, ou d’une partie de celui-ci, après avoir été
manoeuvré
NOTE Lorsque l’appareil d’arrêt d’urgence est en position activée, la machine (ou le matériel) reste à l'état
repos.
60947-5-5 © IEC:1997+A1:2005 – 15 –
R
Resetting (of an emergency stop device). 3.8
Rest position. 3.5

T
Trip wire switch. 3.10

3.1
emergency stop (function or signal)
function or signal which is intended:
– to avert or to reduce hazards to persons, damage to machinery or to work in progress;
– to be initiated by a single human action.
[ISO/IEC 13850:3.1, modified]
3.2
emergency stop device
a manually operated control circuit device used to initiate an emergency stop function
[ISO/IEC 13850:3.2, modified]
NOTE An emergency stop device may also provide auxiliary functions, for example for redundancy and/or for
signalling through additional contact element(s). Such additional contact(s) may be normally open and/or normally
closed.
3.3
actuating system (of an emergency stop device)
the mechanical parts which transmit the actuating force to the contact elements
[IEV 441-15-21 modified]
3.4
actuator (of an emergency stop device)
the part of the actuating system which is actuated by a part of the human body
[IEV 441-15-22 modified]
NOTE 1 Examples of an actuator may be a button, a wire, a rope, a bar, a foot pedal.

3.5
rest position
the position of an emergency stop device, or of a part of it, which has not been actuated
NOTE In rest position, the machine (or equipment) may work.
3.6
actuated position
the position of an emergency stop device, or of a part of it, after it has been actuated
NOTE In the actuated position of the emergency stop device the machine (or equipment) remains at rest.

– 16 – 60947-5-5 © CEI:1997+A1:2005
3.7
verrouillage (d'un appareil d'arrêt d'urgence)
fonction ou dispositif qui enclenche et maintient le système de commande en position activée
jusqu'au réarmement par une manoeuvre manuelle séparée
3.8
réarmement (d’un appareil d’arrêt d’urgence)
manœuvre manuelle permettant au système de commande de l'appareil d'arrêt d'urgence de
retourner de la position activée à la position de repos
NOTE Le réarmement peut se faire, par exemple, par la rotation d’une clef, ou de l'organe de commande, en
tirant l'organe de commande ou en poussant un bouton spécial de réarmement.
3.9
manoeuvre positive d'ouverture (d'un élément de contact)
accomplissement de la séparation des contacts résultant directement d'un mouvement de
l'organe de commande et effectué au moyen de pièces non élastiques (par exemple sans
l'intermédiaire de ressort)
[K.2.2 de la CEI 60947-5-1].
3.10
interrupteur à commande par câble
interrupteur actionné par câble
appareil d’arrêt d’urgence dans lequel l’organe de commande est une corde, un câble ou un
moyen similaire
4 Marquage et information sur le produit
4.1 Généralités
Les informations nécessaires à l'installation, au fonctionnement, à l'entretien et/ou à la
périodicité des essais doivent être fournies sur ou avec l'appareil d'arrêt d'urgence.
La vérification de l'article 4 doit être faite selon 7.2.1.
NOTE 1 Dans certains cas, il peut être nécessaire de fournir des informations supplémentaires, par exemple:
– avec des étiquettes,
– avec des drapeaux liés aux câbles ou cordes pour améliorer leur visibilité,
– avec le symbole graphique 60417-CEI-5638 (voir Tableau 6 de la CEI 61310-1).
NOTE 2 Voir aussi 9.2.5.4 de la CEI 60204-1.
4.2 Indications sur les boutons
4.2.1 Les boutons utilisés comme organes de commande d'un appareil d'arrêt d'urgence
doivent être de couleur rouge. La surface située derrière l'organe de commande, lorsqu'il en
existe une et pour autant que ce soit praticable, doit être de couleur jaune.
4.2.2 La direction du déverrouillage doit être clairement identifiée lorsque le réarmement est
obtenu par rotation du bouton.
NOTE Voir aussi la CEI 60073 et l'ISO 3864.

60947-5-5 © IEC:1997+A1:2005 – 17 –
3.7
latching (of an emergency stop device)
function or means which engages and maintains the actuating system in the actuated position
until reset by a separate manual action
3.8
resetting (of an emergency stop device)
manual action to return the actuating system of the emergency stop device from the actuated
position to the rest position
NOTE Examples of resetting include the rotation of a key, or of the actuator, pulling the actuator or pushing a
special reset button.
3.9
direct opening action (positive opening action) (of a contact element)
the achievement of contact separation as a direct result of a specified movement of the
switch actuator through non-resilient members (e.g. non dependent upon springs)
[K.2.2 of IEC 60947-5-1]
3.10
trip wire switch
rope pull switch
pull cord operated switch
emergency stop device in which the actuator is a rope, a wire or similar means
4 Marking and product information
4.1 General
Information for installation, operation, maintenance and/or periodic testing shall be provided
when necessary on or with the emergency stop device.
The verification of clause 4 shall be conducted according to 7.2.1.
NOTE 1 In certain circumstances, it may be necessary to provide additional information, for example:
– by labels,
– by marker flags attached to wires or ropes to improve their visibility,
– by the graphical symbol 60417-IEC-5638 (see Table 6 of IEC 61310-1).
NOTE 2 See also 9.2.5.4 of IEC 60204-1.
4.2 Indications on buttons
4.2.1 Buttons used as actuators of an emergency stop device shall be coloured red. When a
background exists behind the actuator, and as far as it is practicable, it shall be coloured
yellow.
4.2.2 The direction of unlatching shall be clearly identified when resetting is achieved by
rotation of the button.
NOTE See also IEC 60073 and ISO 3864.

– 18 – 60947-5-5 © CEI:1997+A1:2005
4.3 Prescriptions supplémentaires pour les interrupteurs à commande par câble
Les informations fournies par le constructeur doivent inclure:
– la longueur maximale du câble ou de la corde;
– la tension correcte du câble ou de la corde;
– les distances entre supports;
– la recommandation d'utiliser seulement des parcours droits de câble ou corde;
– éventuellement un guide sur l'entretien des poulies et des oeillets, et les mesures
nécessaires afin de s'assurer que le câble ou la corde reste en position correcte.
4.4 Prescriptions supplémentaires pour le code des couleurs
Un bouton de réarmement, s'il y en a un, par exemple avec un interrupteur à commande par
câble, doit être coloré en bleu.
Lorsqu'un code de couleur est utilisé pour ajuster un interrupteur à commande par câble:
– le vert doit indiquer l'ajustement correct de la position repos; et
– le jaune doit indiquer l'ajustement correct de la position activée.
5 Prescriptions électriques
5.1 Les catégories d'emploi doivent être AC-15 et/ou DC-13 et/ou DC-14 selon la CEI 60947-5-1.
5.2 Tous les éléments de contact normalement fermés d'un appareil d'arrêt d'urgence
doivent avoir une manoeuvre positive d'ouverture selon l'annexe K de la CEI 60947-5-1.
Les essais doivent être effectués selon l'annexe K de la CEI 60947-5-1.
5.3 Le degré de protection fourni par l'appareil d'arrêt d'urgence doit être déclaré par le
constructeur selon l'annexe C et la CEI 60947-1.
5.4 Les essais pour les caractéristiques électriques doivent être effectués selon la CEI 60947-5-1.
NOTE Le paragraphe 7.2.7 de la CEI 60947-5-1 est applicable seulement aux auxiliaires de commande aptes au
sectionnement.
6 Prescriptions mécaniques
6.1 Prescriptions générales
6.1.1 Des moyens doivent être prévus afin de permettre d'installer l'appareil d'arrêt
d'urgence de façon sûre dans sa position de montage prévue.
L'essai doit être effectué selon 7.2.1.
6.1.2 L'appareil d'arrêt d'urgence doit satisfaire aux prescriptions de 7.3, 7.4, 7.5, 7.6 et,
selon le cas, de 7.7.5.
6.1.3 Il doit être possible de manoeuvrer et de réarmer l'appareil d'arrêt d'urgence dans
toutes les conditions normales de service.
L'essai doit être effectué selon 7.2 à 7.7.4.

60947-5-5 © IEC:1997+A1:2005 – 19 –
4.3 Additional requirements for trip wire switches
Information provided by the manufacturer shall include:
– the maximum length of wire or rope;
– the correct tension of wire or rope;
– the distances between supports;
– recommendation to use only straight runs of wire or rope;
– if applicable, guidance on maintenance for pulleys and eyelets, and the measures
necessary to ensure that the wire or rope remains in proper position.
4.4 Additional requirements for colour coding
A resetting button, for example where applicable with a trip wire
...

IEC 60947-5-5 ®
Edition 1.2 2016-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage switchgear and controlgear –
Part 5-5: Control circuit devices and switching elements – Electrical emergency
stop device with mechanical latching function

Appareillage à basse tension –
Partie 5-5: Appareils et éléments de commutation pour circuits de commande –
Appareil d'arrêt d'urgence électrique à accrochage mécanique

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IEC 60947-5-5 ®
Edition 1.2 2016-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Low-voltage switchgear and controlgear –

Part 5-5: Control circuit devices and switching elements – Electrical emergency

stop device with mechanical latching function

Appareillage à basse tension –

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

Appareil d'arrêt d'urgence électrique à accrochage mécanique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.99, 29.130.20 ISBN 978-2-8322-3221-7

IEC 60947-5-5 ®
Edition 1.2 2016-02
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Low-voltage switchgear and controlgear –
Part 5-5: Control circuit devices and switching elements – Electrical emergency
stop device with mechanical latching function

Appareillage à basse tension –
Partie 5-5: Appareils et éléments de commutation pour circuits de commande –
Appareil d'arrêt d'urgence électrique à accrochage mécanique

- 2 - IEC 60947-5-5:1997+AMD1:2005
+AMD2:2016 CSV © IEC 2016
CONTENTS
FO REW O RD . 3
INT RODUCT ION . 5
1 Scope . 6
2 Normative references . 6
3 Definitions . 7
4 Marking and product information . 9
4.1 G ener al . 9
4.2 Indications on buttons . 9
4.3 Additional requirements for trip wire switches . 10
4.4 Additional requirements for colour coding . 10
5 Electrical requirements . 10
6 Mechanical requirements . 11
6.1 General requirements . 11
6.2 Latching . 11
6.3 Additional requirements for button type emergency stop device . 12
6.4 Additional requirements for trip wire switches . 12
6.5 Additional requirement for footswitches . 12
6.6 Mechanical requirements for functional safety applications . 13
7 Testing of the mechanical design . 13
7.1 G ener al . 13
7.2 General design inspection . 13
7.3 Operating tests . 13
7.4 Conditioning pr oc edur es . 15
7.5 Shock test . 15
7.6 Vibration tests . 15
7.7 Latching, resetting and impact tests . 16
7.8 Miscellaneous tests . 19
Annex A (informative) Emergency operation .
Annex A (normative) Procedure to determine reliability data for electrical emergency
stop devices used in functional safety applications . 21
Bibliography . 23

Figure 1 – Hammer for tests . 17
Figure 2 – Symbol (5638) for emergency stop . 10

Table 1 – Robustness of a button-type actuator . 14
Table 2 – Relationship between the emergency stop mounting hole and the hammer
height . 18

+AMD2:2016 CSV © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_________
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 5-5: Control circuit devices and switching elements –
Electrical emergency stop device with mechanical latching function
FOREWORD
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This consolidated version of the official IEC Standard and its amendments has been
prepared for user convenience.
IEC 60947-5-5 edition 1.2 contains the first edition (1997-11) [documents 17B/837/FDIS
and 17B/856/RVD], its amendment 1 (2005-01) [documents 17B/1389/FDIS and 17B/1399/
RVD] and its corrigendum (July 2007), and its amendment 2 (2016-02) [documents
121A/60/FDIS and 121A/72/RVD].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendments 1 and 2. Additions and deletions are displayed in red, with
deletions being struck through. A separate Final version with all changes accepted is
available in this publication.

- 4 - IEC 60947-5-5:1997+AMD1:2005
+AMD2:2016 CSV © IEC 2016
International Standard IEC 60947-5-5 has been prepared by subcommittee 17B: Low-voltage
switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear.
Annex A is for information only.
This section 5 standard shall be used in conjunction with IEC 60947-1:1996 and with
IEC 60947-5-1:1997.
The committee has decided that the contents of the base publication and its amendment 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

+AMD2:2016 CSV © IEC 2016
INTRODUCTION
The present IEC 60947-5-5 deals specifically with electrical emergency stop devices with
mechanical latching function and gives additional electrical and mechanical requirements to
those given in the following International Standards:
– ISO 13850 giving requirements for the emergency stop function of a machine, whatever
be the energy used;
– IEC 60204-1 giving additional requirements for an emergency stop function realized by
the electrical equipment of a machine;
– IEC 60947-5-1 specifying electrical characteristics of electromechanical control circuit
devices.
- 6 - IEC 60947-5-5:1997+AMD1:2005
+AMD2:2016 CSV © IEC 2016
LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
Part 5-5: Control circuit devices and switching elements –
Electrical emergency stop device with mechanical latching function

1 Scope
This section of IEC 60947-5 provides detailed specifications relating to the electrical and
mechanical construction of emergency stop devices with mechanical latching function and to
their testing.
This standard is applicable to electrical control circuit devices and switching elements which
are used to provide initiate an emergency stop signal. Such devices may be either provided
with their own enclosure, or installed according to the manufacturer's instructions.
This standard does not apply to:
– emergency stop devices for non-electrical control circuit, for example hydraulic,
pneumatic;
– emergency stop devices without mechanical latching function.
An emergency stop device may also be used to provide an emergency switching off function
(see annex A).
This standard does not deal with any specific requirements on noise as the noise emission of
electrical emergency stop devices with mechanical latching function is not considered to be a
relevant hazard.
NOTE See also 9.2.5.4 of IEC 60204-1:2005.
2 Normative references
The following normative documents contain provisions, which through reference in this text,
constitute provisions of this section of IEC 60947-5. At the time of publication, the editions
indicated were valid. All normative documents are subject to revision, and parties to
agreements based on this section of IEC 60947-5 are encouraged to investigate the possibility
of applying the most recent editions of the normative documents indicated below. Members of
IEC and ISO maintain registers of currently valid International Standards.
The following referenced documents are indispensable for the application 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.
IEC 60050(441):1984, International Electrotechnical Vocabulary (IEV) – Chapter 441:
Switchgear, controlgear, fuses
Amendment 1 (2000)
IEC 60068-2-1:1990 2007, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2:1974 2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-6:1995 2007, Environmental testing – Part 2-6: Tests – Test Fc: Vibration
(sinusoidal)
+AMD2:2016 CSV © IEC 2016
IEC 60068-2-11:1981, Environmental testing – Part 2: Tests – Test Ka: Salt mist
IEC 60068-2-27:1987 2008, Environmental testing – Part 2-27: Tests – Test Ea and guidance:
Shock
IEC 60068-2-30:1980 2005, Environmental testing – Part 2-30: Tests – Test Db and guidance:
Damp heat, cyclic (12 h + 12 h cycle)
IEC 60073:1996, Basic and safety principles for man-machine interface, marking and identi-
fication – Coding principles for indicating devices and actuators
IEC 60204-1:1992, Electrical equipment of industrial machines – Part 1: General requirements
IEC 60417-DB:2002 , Graphical symbols for use on equipment
IEC 60721-3-3:1994, Classification of environmental conditions – Part 3: Classification of
groups of environmental parameters and their severities – Section 3: Stationary use at
weather protected location
Amendment 1 (1995)
Amendment 2 (1996)
IEC 60947-1:1996 2007, Low-voltage switchgear and controlgear – Part 1: General rules
IEC 60947-1:2007/AMD1:2010
IEC 60947-1:2007/AMD2:2014
IEC 60947-5-1:1997 2016, Low-voltage switchgear and controlgear – Part 5-1: Control circuit
devices and switching elements – Electromechanical control circuit devices
IEC 61310-1:1995 2007, Safety of machinery – Indication, marking and actuation – Part 1:
Requirements for visual, auditory acoustic and tactile signals
ISO 3864:1984, Safety colours and safety signs
ISO 13850:1996 2015, Safety of machinery – Emergency stop function – Principles for design
3 Definitions
For the purpose of this section of IEC 60947-5, the following definitions apply in addition to
those given in IEC 60947-1 and in IEC 60947-5-1.
Reference
A
Actuated position . 3.6
Actuating system (of an emergency stop device) . 3.3
Actuator (of an emergency stop dev ic e) . 3.4

D
Direct opening action (of a contact element) . 3.9

E
Emergency stop (function or signal) . 3.1
Emergency stop device . 3.2

L
______
“DB” refers to the IEC on-line database, available at: http://www.graphical-symbols.info/equipment.

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Latching (of an emergency stop device) . 3.7

P
Positive opening action (of a contact element) . 3.9

R
Resetting (of an emergency stop device) . 3.8
Rest position . 3.5

T
Trip wire switch . 3.10

3.1
emergency stop (function or signal)
function or signal which is intended:
– to avert or to reduce hazards to persons, damage to machinery or to work in progress;
– to be initiated by a single human action.
[ISO/IEC 13850:2015, definition 3.1, modified– extended to “emergency stop signal”, no use of
E-stop]
3.2
emergency stop device
A manually operated control circuit device used to initiate an emergency stop function
NOTE An emergency stop device may also provide auxiliary functions, for example for redundancy and/or for
signalling through additional contact element(s). Such additional contact(s) may be normally open and/or normally
closed.
[ISO/IEC 13850:3.2, modified]
3.3
actuating system (of an emergency stop device)
The mechanical parts which transmit the actuating force to the contact elements
[IEC 60050-441:1984, 441-15-21, modified – restricted to electromechanical emergency stop
devices; the note is not relevant anymore]
3.4
actuator (of an emergency stop device)
The part of the actuating system which is actuated by a part of the human body
NOTE 1 Examples of an actuator may be a button, a wire, a rope, a bar, a foot pedal.
NOTE 2 This applies to the French text only.
[IEC 60050-441:1984, 441-15-22, modified – actuation is intented to be achieved by human
only]
3.5
rest position
The position of an emergency stop device, or of a part of it, which has not been actuated
NOTE In rest position, the machine (or equipment) may work.

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3.6
actuated position
The position of an emergency stop device, or of a part of it, after it has been actuated
NOTE In the actuated position of the emergency stop device the machine (or equipment) remains at rest.
3.7
latching (of an emergency stop device)
function or means which engage and maintain the actuating system in the actuated position
until reset by a separate manual action
3.8
resetting (of a emergency stop device)
manual action letting to retun the actuating system return of the emergency stop device from
the actuated position to its the rest position after it has been moved to the actuated position
NOTE Examples of resetting include the rotation of a key, or of the actuator, pulling the actuator or pushing or
rotating a special reset button.
3.9
direct opening action (positive opening action) (of a contact element)
DEPRECATED: positive opening action (of a contact element)
The achievement of contact separation as a direct result of a specified movement of
the switch actuator through non-resilient members (e.g. non dependent upon springs)
[IEC 60947-5-1:2016, K.2.2, modified – addition of a deprecated term]
3.10
trip wire switch
rope pull switch
pull cord operated switch
emergency stop device in which the actuator is a rope, a wire or similar means
4 Marking and product information
4.1 General
Information for installation, operation, maintenance and/or periodic testing shall be provided
when necessary on or with the emergency stop device.
The verification of clause 4 shall be conducted according to 7.2.1.
NOTE 1 In certain circumstances, it may be necessary to provide additional information, for example:
– by labels,
– by marker flags attached to wires or ropes to improve their visibility,
– by a graphical symbol 60417-IEC-5638 (see 4.2.2 or Table 6 A.1 of IEC 61310-1:2007).
NOTE 2 See also 9.2.5.4 of IEC 60204-1.
4.2 Indications on buttons
4.2.1 Buttons used as actuators of an emergency stop device actuators shall be coloured red.
When a background exists behind the actuator, and as far as it is practicable, it shall be
coloured yellow.
Where a symbol is needed for clarification, the symbol IEC 60417-5638 (DB:2002-10) shall be
used (see Figure 2).
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Figure 2 – Symbol (5638) for emergency stop
4.2.2 The direction of unlatching shall be clearly identified when resetting is achieved by
rotation of the button. This identification shall have the same or nearly the same colour as the
actuator in order to avoid misinterpretation.
NOTE See also IEC 60073 and ISO 3864 series.
4.3 Additional requirements for trip wire switches
Information provided by the manufacturer shall include:
– the maximum length of wire or rope;
– the correct tension of wire or rope;
– the distances between supports;
– recommendation to use only straight runs of wire or rope;
– if applicable, guidance on maintenance for pulleys and eyelets, and the measures
necessary to ensure that the wire or rope remains in proper position.
4.4 Additional requirements for colour coding
A resetting button, for example where applicable with a trip wire switch, shall be coloured blue.
When a colour coding is used for coloured indicators are provided to assist setting of a trip wire
switch:
– green shall indicate the correct setting of the rest position; and
– yellow shall indicate the correct setting of the actuated position.
5 Electrical requirements
5.1 The utilization categories shall be AC-15 and/or DC-13 and/or DC-14 in accordance with
IEC 60947-5-1.
Depending on the associated devices, the utilization categories shall be one or more categories
selected from Table 1 of IEC 60947-5-1:2016.
NOTE For guidance refer to Annex K of IEC 60947-5-1:2016.
5.2 All normally closed contact elements of an emergency stop device shall have a direct
opening action (positive opening action), according to in accordance with Annex K of IEC
60947-5-1:2016.
The tests shall be conducted according to Annex K of IEC 60947-5-1:2016.
5.3 The degree of protection provided by the emergency stop device shall be stated by the
manufacturer in accordance with annex C of IEC 60947-1.
5.4 Tests for electrical characteristics shall be conducted according to IEC 60947-5-1.

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NOTE Subclause 7.2.7 of IEC 60947-5-1:2016 only applies to control switches suitable for isolation.
5.5 Electrical requirements for functional safety applications: in cases where it is necessary to
obtain data, tests shall be made according to A.3.2.3 of this standard.
6 Mechanical requirements
6.1 General requirements
6.1.1 Means shall be provided to enable the emergency stop device to be securely installed in
its intended mounting position.
The test shall be conducted according to 7.2.1.
6.1.2 The emergency stop device shall withstand the load as defined in meet the
requirements of 7.3, 7.4, 7.5, 7.6 and, where applicable, in 7.8.1 of 7.7.5.
6.1.3 It shall be possible to operate and reset the emergency stop device under all normal
service conditions (including a forseeable misuse).
The test shall be conducted according to 7.2 to 7.7.4.
6.1.4 Vibration or shocks shall not cause the opening of the contacts in the closed position or
the closing of the contacts in the open position, nor operation of the latching mechanism.
The tests shall be conducted according to 7.5 and 7.6 and, where applicable, to 7.8.1.
6.2 Latching
*
6.2.1 In accordance with 4.4.4 of ISO 13850 , When the emergency stop signal (including the
necessary clearance distance) has been generated during actuation of the emergency stop
device, the emergency stop function shall be maintained by latching of the actuating system.
The emergency stop signal shall be maintained until the emergency stop device is reset
(disengaged). It shall not be possible for the emergency stop device to latch-in without
generating the emergency stop signal.
In case of failure in the emergency stop device (including the latching means), the generation
of the emergency stop signal shall have priority over the latching function.
The tests shall be conducted according to 7.2, 7.7.2 and 7.7.3.
6.2.2 The latching shall operate correctly when the emergency stop device is used under
conditions, specified either in 7.4 or by the manufacturer, whichever is more severe.
The test shall be conducted according to 7.3, 7.4, 7.5, 7.6 and 7.7.
6.2.3 The protection of the latching mechanism shall be consistent with the IP rating (see 5.3).
The tests shall be conducted according to 7.4 and 7.8.3.
______
*
Corresponds to 4.1.11 of EN 418.

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6.3 Additional requirements for button type emergency stop device
6.3.1 The resetting of the latching means shall be by turning a key, by rotation of the button in
the designated direction, or by a pulling motion.
The test shall be conducted according to 7.2.1 and 7.2.2.1.
6.3.2 The emergency stop device shall be so designed that:
– the emergency stop actuator can be operated in a direction perpendicular to its mounting
surface;
– removal of the actuator is from the inside of the enclosure only, or from the outside of the
enclosure by use of a tool intended for that purpose;
– it can be actuated by a one-handed continuous motion.
The tests shall be conducted according to 7.2.2.2 and 7.3.2.
This shall be verified by inspection (see 7.2.1).
6.4 Additional requirements for trip wire switches
6.4.1 The construction of the emergency stop device shall be such that:
– the setting of the wire or rope, and subsequent adjustment, can be carried out without
causing malfunction; and
– the installation of the emergency stop device can fulfil the requirements of 4.5.1 and
4.5.2 4.4.1 and 4.42 of ISO/IEC 13850:2015.
The tests shall be conducted according to 7.2 and 7.3.
6.4.2 When the actuator is installed according to the manufacturer’s instructions:
– the perpendicular pulling force applied to at the mid-length of the wire or rope, necessary
for generating the emergency stop signal (opening of the contacts), shall be less than 200
N;
– the perpendicular deflection of the wire or rope (at mid-length), necessary for generating
the emergency stop signal, shall be less than 400 mm;
– the breaking or disengagement of the wire or rope shall generate the emergency stop
signal;
– the tests shall be conducted according to 7.8.2.
– the wire or rope shall resist a tension force 10 times higher than the perpendicular pulling
force necessary for generating the emergency stop signal.
The tests shall be conducted according to 7.8.1.
6.4.3 Changes in the length of the rope (for example temperature, age etc.) shall be taken
into account.
The tests shall be conducted according to 7.2.1.
6.5 Additional requirement for footswitches
A pedal (footswitch) type emergency stop device shall have no cover.
The test shall be conducted according to 7.2.1.

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6.6 Mechanical requirements for functional safety applications
In cases where it is necessary to obtain data needed for functional safety applications, tests
shall be made according to A.3.2.2 of this standard.
7 Testing of the mechanical design
7.1 General
In accordance with 8.1.1 and 8.1.2 of IEC 60947-1, type tests shall be made to prove
compliance with the requirements of clauses 4, 5 and 6.
An emergency stop device may have combinations of both main and auxiliary contacts. The
tests given in 7.5 and 7.6 are to verify that all these contacts are not adversely affected by
mechanical shocks.
Some tests, for example based on visual inspection, or by checking the literature provided with
the emergency stop device, require only one sample.
For the tests described in 7.3.2 7.3.3, 7.4, 7.5, 7.6 and 7.7, three identical samples of
emergency stop device shall be selected, and each sample shall be subjected successfully to
the sequence of tests, in the order given in this clause.
When more than one type of emergency stop device is manufactured to the same basic design,
after having taken into account the drawings, less than three identical samples may be tested
for acceptation, providing that more than three products of the same family are tested. Such an
acceptance shall be fully documented.
7.2 General design inspection
7.2.1 The requirements of 4.1, 6.1.1, 6.4.1 and, where applicable, of 6.3, 6.4.3 and 6.5 are
verified by inspection of the mechanical structure of the emergency stop device.
7.2.2 Button type emergency stop device.
7.2.2.1 The requirement of 6.3.1 is checked by latching and resetting the actuator manually.
7.2.2.2 The requirement of 6.3.2 is verified by inspection of the fastening parts, and by pulling
and turning the button and other parts of the device by hand.
7.3 Operating tests
7.3.1 General
The purpose of the operating tests is to verify the durability of the latching parts (springs, balls,
pins etc.) in normal use.
The test verifies the requirements of 6.1.2, 6.2.2 and 6.3.
The operating tests described in this subclause may be carried out in conjunction with the
electrical tests (see clause 5).
7.3.2 Robustness of a button actuator
A button actuator shall withstand:

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− a force as specified in Table 1, applied in the three mutually perpendicular axes; and
− a torque as specified in Table 1, in both directions of rotation, in each of the latched and
unlatched positions, where the resetting action requires rotation of the push-button.
Table 1 – Robustness of a button-type actuator
Mounting hole diameter Force Torque
mm N N m
+02,
80 1,6
D16: 16,2
+04,
D22: 22,3 110 2,2
+05,
D30: 30,5 150 3,0
For mounting holes having dimension other than in Table 1:
– force (in newton) shall be five times the largest dimension of the mounting hole (i.e., for a
square or rectangular hole, the diagonal measurement) in mm;
– torque (in newton meter) shall be equal to 0,1 time the largest dimension of the mounting
hole (i.e., for a square or rectangular hole, the diagonal measurement) in mm.
For an emergency stop button not mounted in a single hole:
– if the actuator diameter (or largest dimension) is less than 30 mm, use the values for
D22 mm;
– if the actuator diameter (or largest dimension) is equal to or greater than 30 mm, use the
values for D30 mm.
7.3.27.3.3 Durability test
The three samples (see 7.1) shall be subjected to the following test:
The actuator of an emergency stop device shall be moved through its full travel, then it shall be
reset in a manner to imitate human operation as closely as possible. For pushbuttons, the
requirements of IEC 60947-5-1:2016, 8.3.2.1 a) applies.
The test shall consist of 6 050 cycles in which latching and resetting of the actuator occurs
during each cycle. The movement and actuating forces shall be consistent throughout the test.
Monitoring of these parameters shall be carried out to ensure consistency. For the actuating
forces, verification at the beginning and at the end is required.
The durability test is passed if each emergency stop device completes the 6 050 cycles without
failure.
7.3.3 Robustness of a button actuator
To comply with 6.1.2, a button actuator shall withstand:
– a force (in Newton) of five times the mounting hole diameter (in mm) applied in the three
mutually perpendicular axes; and
– a torque (in Newton⋅metre) equal to 0,1 times the mounting hole diameter (in mm) in both
directions of rotation, where the resetting action requires rotation of the push button.

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7.4 Conditioning procedures
The purpose of the following procedures is to expose the emergency stop devices to various
environmental conditions in order to verify their functioning after such exposure.
Devices intended for mounting on enclosures shall be mounted for the purposes of this
conditioning in such a manner as to permit the entire emergency stop device to be exposed to
the conditioning media except for the exposure to salt mist in accordance with IEC 60068-2-11.
Devices subjected to salt mist may be either provided with their own enclosure, or installed in
an enclosure according to the manufacturer's instructions. The device is exposed to the salt
mist only outside the enclosure.
The device shall be rinsed clean before further tests are performed.
The three emergency stop devices successfully tested in 7.3.2 7.3.3 shall be subjected to the
following exposures:
• 96 h at +70 °C in dry atmosphere (see test Ba Bb of IEC 60068-2-2 and IEC 60721-3-3
class 3K7)
• 96 h at changing moist and warm atmosphere (see IEC 60068-2-30 and IEC 60721-3-3
class 3K7):
+25 °C/+55 °C  97 % / 93 % RH
• 96 h at –40 °C (see IEC 60068-2-1: test Aa Ab and IEC 60721-3-3 class 3K7)
• 96 h at +35 °C in a solution of 5 % NaCI (see IEC 60068-2-11 and IEC 60721-3-3
class 3C3).
Following the environmental exposures and after the devices have been restored to room
temperature, the sequence of tests in 7.5, 7.6 and 7.7 shall be conducted.
7.5 Shock test
7.5.1 The three emergency stop devices which have been conditioned in accordance with 7.4
shall be tested each on one of the three mutually perpendicular axes.
7.5.2 Each emergency stop device is tested in the rest position and shall withstand 15 g
shock in both directions of the corresponding axis (see IEC 60068-2-27:11 ms: 15 g).
During the test, the closed contacts shall not open, the open contacts, if applicable, shall not
close and the latching mechanism shall not latch.
The checking means shall be able to detect any opening or closing of contacts longer than 0,2 ms.
7.5.3 The procedure is repeated in the actuated position (actuator latched).
During the test, the open contacts shall not close; the closed contacts, if applicable, shall not
open; and the latching mechanism shall not unlatch.
7.6 Vibration tests
7.6.1 The three samples used for 7.5 shall be tested, one for each of the three mutually
perpendicular axes.
7.6.2 Each emergency stop device is tested in the rest position as per the following
specifications (see IEC 60068-2-6):
– frequency range: 10 Hz to 500 Hz, logarithmic ramp and return;

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– duration 2 h: 10 sweep cycles, 1 oct/min;
– maximum peak amplitude: 0,35 mm (0,7 mm from peak to peak);
– maximum acceleration: 50 m/s²;
– crossover frequency between 58 Hz and 62 Hz.
During the test, the closed contacts shall not open, the open contacts, if applicable, shall not
close, and the latching mechanism shall not latch.
The checking means shall be able to detect any opening or closing of contacts longer
than 0,2 ms.
7.6.3 The procedure is repeated in the actuated position (actuator latched).
During the test, the open contacts shall not close, the closed contacts, if applicable, shall not
open, and the latching mechanism shall not unlatch.
7.7 Latching, resetting and impact tests
7.7.1 General
The three sample emergency stop devices which have successfully completed the tests of 7.6
shall be used for the following tests.
The requirements of 6.2.1 are verified by testing each sample in accordance with 7.7.2, 7.7.3
and 7.7.4. The sample shall also be tested in accordance with 7.7.5 where applicable.
7.7.2 Opening test
The actuator of the emergency stop device shall be moved slowly just to the point where
latching occurs.
The normally closed contacts shall then be open. This shall be verified by an impulse voltage
test at 2 500 V (see details in K.8.3.4.4.1 of IEC 60947-5-1:2016).
7.7.3 Latching test for button-type emergency device
To simulate a normal human action the typical human actuation of a button-type switch, the
emergency stop device and its actuator are shall be mounted in front of and tested by a
pendulum-type hammer as shown in Figure 1. The support of the device under test shall not
move more than 0,1 mm when the shock is applied (see IEC 60068-2-75).

+AMD2:2016 CSV © IEC 2016
L > 1 000 mm
Rubber
45 shore
V = 0
20 mm
e = 18,5 mm
V
max
h
m = 1,6 kg
IEC  1 415/97
Aluminium tube, diameter 20 mm,
thickness 1 mm
3%
+
Length L:
L
Rubber 45 shore A
Diameter:  20 mm
V = 0
Thickness: 18,5 mm
Device under test
V
max
h
m = 1,6 kg ± 2%
IEC
NOTE The 1,6 kg mass doe
...