SIST EN ISO 13851:2019
(Main)Safety of machinery - Two-hand control devices - Principles for design and selection (ISO 13851:2019)
Safety of machinery - Two-hand control devices - Principles for design and selection (ISO 13851:2019)
This European Standard specifies the safety requirements of a two-hand control device and the dependency of the output signal from the input signals and describes the main characteristics of two-hand control devices for the achievement of safety and sets out combinations of functional characteristics for three types. It does not apply to devices intended to be used as enabling devices, as hold-to-run devices or as special control devices. This European Standard provides requirements and guidance on the design and selection (based on a risk assessment) of two-hand control devices including their assessment, the prevention of defeat and the avoidance of faults. It also provides requirements and guidance for two-hand control devices containing a programmable electronic system. It applies to all two-hand control devices, independent of the energy used, including two-hand control devices which are or are not integral parts of a machine and two-hand control devices which consist of one or more than one separate element.
Sicherheit von Maschinen - Zweihandschaltungen - Funktionelle Aspekte und Gestaltungsleitsätze (ISO 13851:2019)
Dieses Dokument legt die Sicherheitsanforderungen an eine Zweihandschaltung und die Abhängigkeit des Ausgangssignals von der manuellen Betätigung der Stellteile fest.
Dieses Dokument beschreibt die Haupteigenschaften von Zweihandschaltungen zur Erlangung von Sicherheit und führt Kombinationen von funktionalen Eigenschaften für 3 Typen auf. Dieses Dokument gilt nicht für Einrichtungen, die für die Verwendung als Zustimmungseinrichtung, Steuerungseinrichtung mit selbsttätiger Rückstellung (Tippschalter) oder als spezielle Steuereinrichtung bestimmt sind.
Dieses Dokument legt nicht fest, mit welchen Maschinen Zweihandschaltungen angewendet werden müssen. Es legt ebenfalls nicht fest, welche Typen von Zweihandschaltungen für eine bestimmte Anwendung verwendet werden müssen. Darüber hinaus legt es nicht den erforderlichen Abstand zwischen der Zweihandschaltung und dem Gefahrbereich fest (siehe 8.8), auch wenn hierzu Anleitungen gegeben werden.
Dieses Dokument stellt Anforderungen an die Gestaltung und Anleitungen zur Auswahl (als Ergebnis einer Risikobeurteilung) von Zweihandschaltungen einschließlich der Verhinderung des Umgehens, des Vermeidens von Ausfällen und der Konformitätsüberprüfung zur Verfügung.
ANMERKUNG 1 Eine Zweihandschaltung bietet nur der Person Schutz, die sie verwendet.
ANMERKUNG 2 Für spezifische Maschinen kann die Eignung einer Zweihandschaltung als geeignete Schutzeinrichtung in einer Typ-C-Norm festgelegt werden. Falls eine solche Norm nicht existiert oder nicht zutrifft, liegt die Risikobeurteilung und die Bestimmung geeigneter Schutzmaßnahmen in der Verantwortung des Maschinenherstellers.
Dieses Dokument gilt für alle Zweihandschaltungen, unabhängig von der verwendeten Energie, einschließlich:
Zweihandschaltungen, die für die Montage komplett zusammengebaut vorliegen;
Zweihandschaltungen, die vom Maschinenhersteller oder -integrierer zusammengebaut werden.
Dieses Dokument gilt nicht für Zweihandschaltungen, die vor dem Veröffentlichungsdatum dieses Dokuments hergestellt wurden.
Sécurité des machines - Dispositifs de commande bimanuelle - Principes de conception et de choix (ISO 13851:2019)
Le présent document spécifie les spécifications de sécurité d'un dispositif de commande bimanuelle et l'interdépendance du signal de sortie et de l'actionnement manuel des organes de service.
Le présent document décrit les principales caractéristiques des dispositifs de commande bimanuelle permettant d'assurer la sécurité, et établit des combinaisons de caractéristiques fonctionnelles pour trois types. Il ne s'applique pas aux dispositifs destinés à être utilisés comme dispositifs de validation, comme dispositifs de commande nécessitant une action maintenue, ou comme dispositifs de commande spéciaux.
Le présent document ne spécifie pas avec quelles machines les dispositifs de commande bimanuelle doivent être utilisés. Il ne spécifie pas non plus quels types de dispositifs de commande bimanuelle doivent être utilisés pour une application spécifique. Enfin, il ne spécifie pas la distance entre le dispositif de commande bimanuelle et la zone dangereuse (voir 8.8).
Le présent document fournit des exigences sur la conception et des conseils sur le choix (basés sur l'appréciation du risque) de dispositifs de commande bimanuelle y compris la vérification de conformité, et la prévention de la fraude et des défauts.
NOTE 1 Un dispositif de commande bimanuelle n'offre de protection qu'à son utilisateur.
NOTE 2 La pertinence de l'utilisation d'un dispositif de commande bimanuelle comme dispositif de protection pour les machines spécifiques peut être définie dans une norme de type C. Si une telle norme n'existe pas ou n'est pas adaptée, l'appréciation du risque et la détermination de mesures de protection adéquates relève de la responsabilité du fabricant de la machine.
Le présent document s'applique à tous les dispositifs de commande bimanuelle, indépendamment de l'énergie utilisée, y compris:
— les dispositifs de commande bimanuelle entièrement assemblés pour installation;
— les dispositifs de commande bimanuelle assemblés par le fabricant de machine ou l'intégrateur.
Le présent document n'est pas applicable aux dispositifs de commande bimanuelle fabriqués avant la date de sa publication.
Varnost strojev - Dvoročne krmilne naprave - Načela za načrtovanje in izbiro (ISO 13851:2019)
Ta evropski standard določa varnostne zahteve za dvoročne krmilne naprave in odvisnost izhodnega signala od vhodnih signalov ter opisuje glavne značilnosti dvoročnih krmilnih naprav za zagotavljanje varnosti in določa kombinacije funkcijskih značilnosti za tri tipe. Ne uporablja se za naprave, ki se uporabljajo kot vklopne, zadrževalne ali posebne krmilne naprave. Ta evropski standard podaja zahteve in smernice za načrtovanje in izbiro (na podlagi ocene tveganja) dvoročnih krmilnih naprav, vključno z njihovo oceno ter preprečevanjem odklopa in okvar. Prav tako podaja zahteve in smernice za dvoročne krmilne naprave, ki vsebujejo programirljive elektronske sisteme. Uporablja se za vse dvoročne krmilne naprave ne glede na uporabljeno energijo, vključno z dvoročnimi krmilnimi napravami, ki so ali niso sestavni del stroja, in dvoročnimi krmilnimi napravami, ki so sestavljene iz enega ali več ločenih elementov.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 13851:2019
01-oktober-2019
Nadomešča:
SIST EN 574:1998+A1:2008
Varnost strojev - Dvoročne krmilne naprave - Načela za načrtovanje in izbiro (ISO
13851:2019)
Safety of machinery - Two-hand control devices - Principles for design and selection
(ISO 13851:2019)
Sicherheit von Maschinen - Zweihandschaltungen - Funktionelle Aspekte und
Gestaltungsleitsätze (ISO 13851:2019)
Sécurité des machines - Dispositifs de commande bimanuelle - Principes de conception
et de choix (ISO 13851:2019)
Ta slovenski standard je istoveten z: EN ISO 13851:2019
ICS:
13.110 Varnost strojev Safety of machinery
SIST EN ISO 13851:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 13851:2019
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SIST EN ISO 13851:2019
EN ISO 13851
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 13.110 Supersedes EN 574:1996+A1:2008
English Version
Safety of machinery - Two-hand control devices -
Principles for design and selection (ISO 13851:2019)
Sécurité des machines - Dispositifs de commande Sicherheit von Maschinen - Zweihandschaltungen -
bimanuelle - Principes de conception et de choix (ISO Funktionelle Aspekte und Gestaltungsleitsätze (ISO
13851:2019) 13851:2019)
This European Standard was approved by CEN on 28 February 2019.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13851:2019 E
worldwide for CEN national Members.
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SIST EN ISO 13851:2019
EN ISO 13851:2019 (E)
Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered . 4
2
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SIST EN ISO 13851:2019
EN ISO 13851:2019 (E)
European foreword
This document (EN ISO 13851:2019) has been prepared by Technical Committee ISO/TC 199 "Safety of
machinery" in collaboration with Technical Committee CEN/TC 114 “Safety of machinery” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by October 2019, and conflicting national standards shall
be withdrawn at the latest by October 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 574:1996+A1:2008.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For the relationship with EU Directive(s) see informative Annex ZA, which is an integral part of this
document.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13851:2019 has been approved by CEN as EN ISO 13851:2019 without any modification.
3
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SIST EN ISO 13851:2019
EN ISO 13851:2019 (E)
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered
This European Standard has been prepared under a Commission’s standardization request „M/396
Mandate to CEN and CENELEC for Standardisation in the field of machinery“ to provide one voluntary
means of conforming to essential requirements of Directive 2006/42/EC of the European Parliament
and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast).
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Annex I of Directive
2006/42/EC
Essential Requirement of
Clause(s)/subclause(s) of this EN Remarks/Notes
Directive
Essential Requirement 1.2.1 4.1 and 4.2 None
Essential Requirement 1.2.2 7.1, 7.2, 7.3, 7.4, 7.5, 7.6 and 7.7 None
Essential Requirement 1.2.3 5.1 5.2, 5.3, 5.4, 5.5 and 5.8. None
Essential Requirement 1.2.4 6.2 None
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the products falling within the scope of
this standard.
4
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SIST EN ISO 13851:2019
INTERNATIONAL ISO
STANDARD 13851
Second edition
2019-03
Safety of machinery — Two-hand
control devices — Principles for
design and selection
Sécurité des machines — Dispositifs de commande bimanuelle —
Principes de conception et de choix
Reference number
ISO 13851:2019(E)
©
ISO 2019
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SIST EN ISO 13851:2019
ISO 13851:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 13851:2019
ISO 13851:2019(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 THCD selection and THCD types. 3
4.1 Selection. 3
4.2 Types of THCD . 4
5 Requirements for the design of two-hand control devices . 4
5.1 General . 4
5.2 Use of both hands (simultaneous actuation) . 4
5.3 Relationship between actuation by hand and output signal(s) . 4
5.4 Cessation of the output signal . 5
5.5 Prevention of accidental operation . 5
5.6 Prevention of defeat . 5
5.7 Re-initiation of the output signal . 5
5.8 Synchronous actuation . 5
6 Two hand control safety functions . 6
6.1 Prevention of unexpected start-up . 6
6.2 Releasing of actuators . 6
6.3 Synchronous actuation . 6
7 Prevention of accidental actuation and of defeat . 6
7.1 Common considerations . 6
7.2 Prevention of defeat using one hand . 7
7.3 Prevention of defeat using the hand and elbow of the same arm . 7
7.4 Prevention of defeat using the forearm(s) or elbow(s) . 7
7.5 Prevention of defeat using one hand and any other part of the body . 7
7.6 Measures to prevent blocking of control actuating device(s) . 8
7.7 Accidental actuation . 8
8 General requirements . 8
8.1 Ergonomic requirements . 8
8.2 Operating conditions and environmental influences . 8
8.3 Enclosures . 9
8.4 Selection, design and installation of control actuating devices . 9
8.5 Prevention of unintended output signals by acceleration forces . 9
8.6 Unintended operation of hand-held machines . 9
8.7 Relocatable THCDs .10
8.8 Safety distance.10
9 Verification and validation .11
9.1 General requirements for verification and validation.11
9.2 Visual inspection .12
9.3 Performance test .12
9.4 Measurement .12
9.5 Prevention of defeat .12
10 Marking .12
11 Information for installation, use and maintenance .13
11.1 Information for use .13
11.2 Installation instructions .13
11.3 Operating instructions .14
11.4 Maintenance instructions .14
© ISO 2019 – All rights reserved iii
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SIST EN ISO 13851:2019
ISO 13851:2019(E)
Annex A (normative) Measurement test for the prevention of defeat .15
Bibliography .21
iv © ISO 2019 – All rights reserved
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SIST EN ISO 13851:2019
ISO 13851:2019(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 199, Safety of machinery.
This second edition cancels and replaces the first edition (ISO 13851:2002), which has been technically
revised.
The main change compared to the previous edition is the adaptation of the safety-related parts of the
control system from the categories to the Performance Level (PL) (according to ISO 13849-1) or SIL
with the allocated HTF (according to IEC 62061).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
© ISO 2019 – All rights reserved v
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SIST EN ISO 13851:2019
ISO 13851:2019(E)
Introduction
The structure of safety standards in the field of machinery is as follows:
a) type-A standards (basic safety standards) giving basic concepts, principles for design and general
aspects that can be applied to all machinery;
b) type-B standards (generic safety standards) dealing with one safety aspect or one or more type(s)
of safeguard that can be used across a wide range of machinery:
— type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature, noise);
— type-B2 standards on safeguards (e.g. two-hand controls, interlocking devices, pressure
sensitive devices, guards);
c) type-C standards (machine safety standards) dealing with detailed safety requirements for a
particular machine or group of machines.
This document is a type-B2 standard as stated in ISO 12100.
This document is of relevance, in particular, for the following stakeholder groups representing the
market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organizations, market surveillance etc.).
Others can be affected by the level of machinery safety achieved with the means of the document by the
above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
In addition, this document is intended for standardization bodies elaborating type-C standards.
The requirements of this document can be supplemented or modified by a type-C standard.
For machines that are covered by the scope of a type-C standard and have been designed and built
according to the requirements of that standard, the requirements of that type-C standard take
precedence.
A two-hand control device (THCD) is a protective device. It provides protection for the operator against
reaching danger zones during hazardous situations by locating the control actuating devices in a
specific position and distance from the danger zone(s).
The selection of a THCD as an appropriate safety device depends upon the risk assessment made by
designers, standard makers and others in accordance with ISO 12100.
The definition of a THCD is given in 3.1 and takes precedence over the definition given in ISO 12100.
In some arrangements, enabling devices (see ISO 12100) and/or hold-to-run devices (see ISO 12100)
may comply with the definition of a THCD in this document. Additionally, some special control devices
— such as some crane controls — require the use of two hands and can comply with the definition of a
THCD in this document.
vi © ISO 2019 – All rights reserved
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SIST EN ISO 13851:2019
INTERNATIONAL STANDARD ISO 13851:2019(E)
Safety of machinery — Two-hand control devices —
Principles for design and selection
1 Scope
This document specifies the safety requirements of a two-hand control device (THCD) and the
dependency of the output signal from the actuation by hand of the control actuating devices.
This document describes the main characteristics of THCDs for the achievement of safety and sets out
combinations of functional characteristics for three types. It does not apply to devices intended to be
used as enabling devices, as hold-to-run devices or as special control devices.
This document does not specify with which machines THCDs shall be used. It also does not specify which
types of two-hand-control device shall be used for a specific application. Moreover, while guidance is
given, it does not specify the required distance between the THCD and the danger zone (see 8.8).
This document provides requirements for design and guidance on the selection (based on a risk
assessment) of THCDs including the prevention of defeat, the avoidance of faults and verification of
compliance.
NOTE 1 A THCD only offers protection for the person using it.
NOTE 2 For specific machines, the suitability of a two-hand control as a suitable protective device can be
defined in a type-C standard. If such a standard does not exist or is not appropriate, the risk assessment and
determination of suitable protective measures is the responsibility of the manufacturer of the machine.
This document applies to all THCDs, independent of the energy used, including:
— THCDs which are fully assembled for installation;
— THCDs which are assembled by the machine manufacturer or integrator.
This document is not applicable to THCDs manufactured before the date of its publication.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13849-2:2012, Safety of machinery — Safety-related parts of control systems — Part 2: Validation
ISO 13855:2010, Safety of machinery — Positioning of safeguards with respect to the approach speeds of
parts of the human body
IEC 62061:2005+AMD1: 2012+AMD2: 2015, Safety of machinery — Functional safety of safety-related
electrical, electronic and programmable electronic control systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100 and the following apply.
© ISO 2019 – All rights reserved 1
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SIST EN ISO 13851:2019
ISO 13851:2019(E)
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
two-hand control device
THCD
device which requires simultaneous actuation by the use of both hands in order to initiate and to
maintain hazardous machine functions, thus providing protective measure only for the person who
actuates it
Note 1 to entry: See Figure 1.
Key
1 actuation by hands 5 signal processor(s)
2 THCD 6 output signal(s)
3 control actuating devices (actuators) 7 logic unit
4 signal converter(s)
Figure 1 — Schematic representation of a THCD
Note 2 to entry: Inclusion of Figure 1 is a modification of ISO 12100:2010, 3.28.4.
3.2
input signal
externally actuated signal applied by hand to a control actuating device (3.3)
Note 1 to entry: See Figure 1.
3.3
control actuating device
actuator
component of the THCD (3.1) which senses an input signal (3.2) from one hand and transmits it to a
signal converter (3.6)
Note 1 to entry: See Figure 1.
2 © ISO 2019 – All rights reserved
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SIST EN ISO 13851:2019
ISO 13851:2019(E)
3.4
simultaneous actuation
continuing actuation of both control actuating devices (3.3) during the same time period, whatever the
time lag is between the start of one input signal (3.2) and the start of the other
Note 1 to entry: See Figure 2.
3.5
synchronous actuation
particular case of simultaneous actuation (3.4) within a defined time period
Note 1 to entry: See also 5.8.
3.6
signal converter
component of the THCD (3.1) which receives an input signal (3.2) from a control actuating device (3.3)
and which transmits and/or converts this signal into a form acceptable to the signal processor (3.7)
Note 1 to entry: See Figure 1.
3.7
signal processor
part of the THCD (3.1) which generates the output signal (3.8) as a consequence of the actuation by hands
Note 1 to entry: See Figure 1.
3.8
output signal
signal generated by the THCD (3.1) intended to be processed by a control system
Note 1 to entry: See Figure 1.
3.9
response time
time between the release of a control actuating device (3.3) and the cessation of the output signal (3.8)
Note 1 to entry: See also 8.8.
3.10
relocatable THCD
device which can be moved and used in more than one definable position relative to the danger zone of
the machine with which it is interfaced
4 THCD selection and THCD types
4.1 Selection
The selection of a THCD as a protective device depends upon the risk assessment (e.g. made by machine
manufacturer and integrators, designers and standards requirements).
The selection and the design of the type (see Table 1) of the THCD depend on
— the hazard(s) present;
— the risk assessment in accordance with ISO 12100;
— experience in use of the technology;
— other factors, which shall be specified for each application [e.g. the prevention of accidental actuati
...
SLOVENSKI STANDARD
oSIST prEN ISO 13851:2018
01-februar-2018
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Safety of machinery - Two-hand control devices - Functional aspects and design
principles (ISO/DIS 13851:2017)
Sicherheit von Maschinen - Zweihandschaltungen - Funktionelle Aspekte und
Gestaltungsleitsätze (ISO/DIS 13851:2017)
Sécurité des machines - Dispositifs de commande bimanuelle - Aspects fonctionnels et
principes de conception (ISO/DIS 13851:2017)
Ta slovenski standard je istoveten z: prEN ISO 13851
ICS:
13.110 Varnost strojev Safety of machinery
oSIST prEN ISO 13851:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 13851:2018
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oSIST prEN ISO 13851:2018
DRAFT INTERNATIONAL STANDARD
ISO/DIS 13851
ISO/TC 199 Secretariat: DIN
Voting begins on: Voting terminates on:
2017-12-11 2018-03-05
Safety of machinery — Two-hand control devices —
Functional aspects and design principles
Sécurité des machines — Dispositifs de commande bimanuelle — Aspects fonctionnels et principes de
conception
ICS: 13.110
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Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Types of THCD and their selection . 3
5 Characteristics of two hand control device . 3
5.1 General . 3
5.2 Use of both hands (simultaneous actuation) . 4
5.3 Relationship between input signals and output signal . 4
5.4 Cessation of the output signal . 4
5.5 Prevention of accidental operation . 4
5.6 Prevention of defeat . 4
5.7 Re-initiation of the output signal . 4
5.8 Synchronous actuation . 4
6 Two hand control safety functions . 5
6.1 Prevention of unexpected start-up . 5
6.2 Prevention of blocking . 5
7 Prevention of accidental actuation and of defeat . 5
7.1 Common considerations . 5
7.2 Prevention of defeat using one hand . 6
7.3 Prevention of defeat using the hand and elbow of the same arm . 6
7.4 Prevention of defeat using the forearm(s) or elbow(s) . 6
7.5 Prevention of defeat using one hand and any other part of the body (e.g. knee, hip) . 7
7.6 Prevention of defeat by blocking one control actuating device . 7
7.7 Accidental actuation . 7
8 General requirements . 7
8.1 Ergonomic requirements . 7
8.2 Operating conditions and environmental influences . 8
8.3 Enclosures . 8
8.4 Selection, design and installation of control actuating devices . 8
8.5 Prevention of unintended output signals by acceleration forces . 8
8.6 Unintended operation of mobile and portable hand-held machines . 8
8.7 Mobile THCDs . 9
8.8 Safety distance. 9
9 Verification .10
9.1 General requirements for verification .10
9.2 Visual inspection .11
9.3 Performance check .11
9.4 Measurement .11
9.5 Prevention of defeat .11
10 Marking .12
11 Information for installation, use and maintenance .12
11.1 Provision of information.12
11.2 Installation instructions .13
11.3 Instructions for use .13
11.4 Maintenance instructions .13
Annex A (normative) Measurement test for the prevention of defeat .14
Bibliography .19
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Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 199, Safety of machinery.
Annex A forms a normative part of this International Standard.
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Introduction
The structure of safety standards in the field of machinery is as follows:
a) type-A standards (basic safety standards) giving basic concepts, principles for design, and general
aspects that can be applied to all machinery;
b) type-B standards (generic safety standards) dealing with one safety aspect or one or more type(s)
of safeguard that can be used across a wide range of machinery:
— type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature, noise);
— type-B2 standards on safeguards (e.g. two-hand controls, interlocking devices, pressure
sensitive devices, guards);
c) type-C standards (machine safety standards) dealing with detailed safety requirements for a
particular machine or group of machines.
This International Standard is a type-B1 standard as stated in ISO 12100.
This document is of relevance, in particular, for the following stakeholder groups representing the
market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organizations, market surveillance etc.);
Others can be affected by the level of machinery safety achieved with the means of the document
by the above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).
The above-mentioned stakeholder groups have been given the possibility to participate at the drafting
process of this document.
In addition, this document is intended for standardization bodies elaborating type-C standards.
The requirements of this document can be supplemented or modified by a type-C standard.
For machines that are covered by the scope of a type-C standard and have been designed and built
according to the requirements of that standard, the requirements of that type-C standard take
precedence.
A two-hand control device (THCD) is a safety device (safety component). It provides a measure of
protection for the operator against reaching danger zones during hazardous situations by locating
the control actuating devices in a specific position. For hand-held machinery, it should be taken into
consideration that the danger zone is not stationary.
The selection of a THCD as an appropriate safety device will depend upon the risk assessment made by
designers, standard makers and others in accordance with ISO 12100.
The definition of a THCD is given in 3.1 and takes precedence over the definition given in ISO 12100.
In some arrangements, enabling devices (see ISO 12100) and/or hold-to-run devices (see ISO 12100)
may comply with the definition of a THCD in this International Standard. Additionally, some special
control devices — such as teach pendants for robots and some crane controls — require the use of two
hands and can comply with the definition of a THCD in this International Standard.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 13851:2017(E)
Safety of machinery — Two-hand control devices —
Functional aspects and design principles
1 Scope
This International Standard specifies the safety requirements of a THCD and the dependency of the
output signal from the input signals.
This International Standard describes the main characteristics of THCDs for the achievement of safety
and sets out combinations of functional characteristics for three types. It does not apply to devices
intended to be used as enabling devices, as hold-to-run devices or as special control devices.
This International Standard does not specify with which machines THCDs shall be used. It also does not
specify which types of two-hand-control device shall be used. Moreover, it does not specify the distance
between the THCD and the danger zone (see 8.8).
This International Standard provides requirements and guidance on the design and selection (based on a
risk assessment) of THCDs including their assessment, the prevention of defeat and the avoidance of faults.
This International Standard applies to all THCDs, independent of the energy used, including:
— THCDs which are or are not integral parts of a machine;
— THCDs which consist of one or more than one separate element.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13855:2010, Safety of machinery — Positioning of safeguards with respect to the approach speeds of
parts of the human body
IEC 60204-1:1997, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
EN 894-3, Safety of machinery — Ergonomics requirements for the design of displays and control actuators
- Part 3: Control actuators
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
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3.1
two-hand control device (THCD)
device which requires simultaneous actuation by the use of both hands in order to initiate and to
maintain any hazardous operation of a machine, whilst a hazardous condition exists to which the
operator is exposed, providing protection only for the person who actuates the device See Figure 1.
Key
1 actuation by hand 5 signal processor(s)
2 THCD 6 output signal(s)
3 control actuating device 7 logic unit
4 signal converter(s)
Figure 1 — Schematic representation of a THCD
3.2
input signal
externally actuated signal applied by hand to a control-actuating device
SEE: Figure 1.
3.3
control actuating device
component of the THCD which senses an input signal from one hand and transmits it to a signal
converter
SEE: Figure 1.
3.4
signal converter
component of the THCD which receives an input signal from a control actuating device and which
transmits and/or converts this signal into a form acceptable to the signal processor
SEE: Figure 1.
3.5
signal processor
part of the THCD which generates the output signal as a consequence of the two input signals
SEE: Figure 1.
3.6
output signal
signal generated by the THCD to be fed into the machinery to be controlled, and which is based on one
pair of input signals
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SEE: Figure 1.
3.7
response time
time between the release of a control actuating device and the cessation of the output signalSee also 8.8.
3.8
mobile THCD
device which can be moved and used in more than one definable position relative to the danger zone of
the machine which it controls
4 Types of THCD and their selection
Table 1 defines three types of THCD. It sets out the functional characteristics and the minimum
measures for the safety of each type of THCD in this International Standard.
Table 1 — List of types of THCD and minimum safety requirements
Type
Requirements Subclause I II III
A B C
Use of both hands (simultaneous actuation) 5.2 X X X X X
Relationship between input signals and output signal 5.3 X X X X X
Cessation of the output signal 5.4 X X X X X
Prevention of accidental operation 5.5 X X X X X
Prevention of defeat 5.6 X X X X X
Re-initiation of the output signal 5.7 a X X X X
Synchronous actuation 5.8 a X X X
Use of PL c (according to ISO 13849-1) or SIL 1 (according to 6.2 X X
IEC 62061)
Use of PL d with category 3 (according to ISO 13849-1) or SIL 2 6.3 X X
with HFT=1 (according to IEC 62061)
Use of PL e with category 4 (according to ISO 13849-1) or SIL 3 6.4 X
with HFT=1 (SFF 90 % - 99%) (according to IEC 62061)
The selection and the design of the type (see Table 1) of THCD will depend on
— the hazard(s) present;
— the risk assessment;
— experience in use of the technology;
— other factors, which shall be specified for each application [e.g. the prevention of accidental actuation
and of defeat (see Clause 7), as well as other conditions (see ISO 12100:2010, 5.5.3)].
NOTE Guidance on risk assessment is given in ISO 12100 and detailed examples can be found in
ISO/TR 14121-2.
5 Characteristics of two hand control device
5.1 General
The characteristics described in 5.2 to 5.8 shall be included in THCDs in accordance with Table 1. The
objective is to ensure that the operator's hands are located safely and to prevent an unexpected start-up.
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5.2 Use of both hands (simultaneous actuation)
The THCD shall be designed so that the operator must use both hands simultaneously, one hand on each
control-actuating device, to operate the THCD. This is simultaneous actuation and is independent of any
time lag between the initiations of each of the two input signals (see Figure 2).
5.3 Relationship between input signals and output signal
The input signals applied to each of the two control actuating devices shall together initiate and
maintain the output signal from the THCD only so long as both input signals are applied. The form
of the output signal (e.g. number of channels, pulse, shape, etc.) may vary depending on the design
requirements in each case. It shall always be regarded as, and shall be identified as, a single output
signal by the machine control circuit.
5.4 Cessation of the output signal
The release of either one or both control actuating devices shall initiate the cessation of the output signal.
5.5 Prevention of accidental operation
The probability of operating the control actuating devices accidentally shall be minimized (see Clauses
7 and 8).
5.6 Prevention of defeat
The protective effect of the THCD shall not be easily defeated (see Clauses 7 and 8).
5.7 Re-initiation of the output signal
The re-initiation of the output signal shall only be possible after the release of both control actuating
devices.
5.8 Synchronous actuation
5.8.1 An output signal shall be generated only when both control actuating devices are actuated in a
time lag which is less than or equal to 0,5 s (see Figure 2).
For type III the control actuating devices shall be actuated with a tolerance on the simultaneity of
actuation less than or equal to 0,5 s between the activation of one control activation device and the
activation of the second control activation device. This is considered to be synchronous operation. See
Figure 2.
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Key
1 First hand 5 Cessation of input signals
2 Second hand 6 Time lag ≥ 0,5 s, synchronous actuation
3 Initiation of first input signal 7 Time period of simultaneous actuation
4 Initiation of second input signal
Figure 2 — Input signals in the case of synchronous actuation
5.8.2 If the control actuating devices are not actuated synchronously, the output signal shall be
prevented and it shall be necessary to release both control actuating devices and to re-apply both input
signals.
NOTE Where two or more THCDs are used to operate one machine, synchronous actuation is required only
within each THCD and is not required between devices.
6 Two hand control safety functions
6.1 Prevention of unexpected start-up
The output signal from the THCD shall only become “active” (potentially allowing an unsafe condition
in the interfaced machine) while both actuators of the THCD are actuated and remain actuated. This
safety function shall be achieved to an equivalent (or better) integrity level to the CAT/PL (or SIL) as per
Table 1 for the subject Type of THCD.
6.2 Prevention of blocking
A subsequent output signal from the THCD shall not be possible unless the THCD actuators have both
been released. This safety function shall be achieved to an equivalent (or better) integrity level to the
CAT/PL (or SIL) as per Table 1 for the subject Type of THCD.
7 Prevention of accidental actuation and of defeat
7.1 Common considerations
The control actuating devices of a THCD shall be designed and arranged in such a way that the
protective effect of the THCD cannot be easily defeated and that the probability of accidental actuation
is minimized, in accordance with the risk assessment for the particular application.
The use of one hand alone, the use of possible combinations of one hand and/or other parts of the body
and/or the use of simple aids which allow defeat shall all be considered, so that it shall not be possible to
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reach into the danger zone during a hazardous situation. Accidental actuation (e.g. by the clothes of the
operator) shall be considered in the same way.
Simple aids can be e.g. bridges, cords or tapes. The selection of dissimilar actuating directions, covers,
shapes, etc., shall minimize the possibilities of defeat. The possibility of a THCD being operated by two
persons, thus leaving two hands free, can be overcome by using synchronous actuation.
NOTE Total protection from “defeat” is not possible.
7.2 to 7.6 show some separate individual ways in which defeat is possible, together with some
precautionary measures for prevention. The methods of defeat that shall be considered will depend
upon the design of the THCD, the operating conditions, the method of attachment and positioning of the
THCD and the specified safety distance requirements, etc.
7.7 shows some ways of preventing accidental actuation.
The precautionary measures listed may be required singly or in combination to meet this International
Standard. The test procedures which shall be applied to the most common types of design are set out
in 9.5. For other designs of THCD, these test procedures may or may not be applicable. In these cases,
a hazard analysis and an assessment of the risk of the possible use and/or misuse of that design of
THCD shall be carried out and appropriate measures shall be taken to comply with this International
Standard.
7.2 Prevention of defeat using one hand
Measures to prevent defeat by using one hand shall be provided. Examples of suitable measures are:
— separation of the control actuating devices by at least 260 mm (internal dimension);
— the provision of one or more shields or an elevated area between the control actuating devices,
designed in such a way that the control actuating devices are separated by a distance of at least
260 mm around the shields.
7.3 Prevention of defeat using the hand an
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