SIST EN ISO 14119:2014
(Main)Safety of machinery - Interlocking devices associated with guards - Principles for design and selection (ISO 14119:2013)
Safety of machinery - Interlocking devices associated with guards - Principles for design and selection (ISO 14119:2013)
This International Standard specifies principles for the design and selection — independent of the nature of the energy source — of interlocking devices associated with guards. This International Standard covers the parts of guards which actuate interlocking devices. NOTE ISO 14120 specifies general requirements for the design and construction of guards provided primarily to protect persons from mechanical hazards. The processing of the signal from the interlocking device to stop and immobilize the machine is dealt with in ISO 13849-1 or IEC 62061. This International Standard does not necessarily provide all the specific requirements for trapped key systems. This International Standard provides measures to minimize defeat of interlocking devices in a reasonably foreseeable manner.
Sicherheit von Maschinen - Verriegelungseinrichtungen in Verbindung mit trennenden Schutzeinrichtungen - Leitsätze für Gestaltung und Auswahl (ISO 14119:2013)
Diese Internationale Norm legt Leitlinien für die Gestaltung und Auswahl – unabhängig von der Energieart – von Verriegelungseinrichtungen in Verbindung mit trennenden Schutzeinrichtungen fest.
Weiterhin enthält sie Anforderungen speziell für elektrische Verriegelungseinrichtungen.
Diese Internationale Norm umfasst Teile von trennenden Schutzeinrichtungen, die Verriegelungseinrichtungen betätigen.
ANMERKUNG ISO 14120 enthält Anforderungen für trennende Schutzeinrichtungen. Die Verarbeitung des von der Verriegelungseinrichtung ausgehenden Signals zum Anhalten und Stillsetzen der Maschine wird in ISO 13849-1 behandelt.
Diese Internationale Norm stellt Maßnahmen bereit, um ein Umgehen von Verriegelungseinrichtungen auf eine vernünftigerweise vorhersehbare Art zu minimieren.
Sécurité des machines - Dispositifs de verrouillage associés à des protecteurs - Principes de conception et de choix (ISO 14119:2013)
L'ISO 14119:2013 spécifie des principes de conception et de choix, indépendamment de la nature de la source d'énergie, des dispositifs de verrouillage associés à des protecteurs. Elle couvre les parties des protecteurs qui actionnent les dispositifs de verrouillage. Elle n'indique pas nécessairement toutes les spécifications particulières relatives aux systèmes à transfert de clé.
L'ISO 14119:2013 fournit des mesures restreignant la possibilité de neutralisation frauduleuse raisonnablement prévisible des dispositifs de verrouillage.
Varnost strojev - Zaporne naprave, povezane z varovali - Načela za načrtovanje in izbiro (ISO 14119:2013)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 14119:2014
01-marec-2014
1DGRPHãþD
SIST EN 1088:2000+A2:2008
9DUQRVWVWURMHY=DSRUQHQDSUDYHSRYH]DQH]YDURYDOL1DþHOD]DQDþUWRYDQMHLQ
L]ELUR ,62
Safety of machinery - Interlocking devices associated with guards - Principles for design
and selection (ISO 14119:2013)
Sicherheit von Maschinen - Verriegelungseinrichtungen in Verbindung mit trennenden
Schutzeinrichtungen - Leitsätze für Gestaltung und Auswahl (ISO 14119:2013)
Sécurité des machines - Dispositifs de verrouillage associés à des protecteurs -
Principes de conception et de choix (ISO 14119:2013)
Ta slovenski standard je istoveten z: EN ISO 14119:2013
ICS:
13.110 Varnost strojev Safety of machinery
SIST EN ISO 14119:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 14119:2014
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SIST EN ISO 14119:2014
EUROPEAN STANDARD
EN ISO 14119
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2013
ICS 13.110 Supersedes EN 1088:1995+A2:2008
English Version
Safety of machinery - Interlocking devices associated with
guards - Principles for design and selection (ISO 14119:2013)
Sécurité des machines - Dispositifs de verrouillage Sicherheit von Maschinen - Verriegelungseinrichtungen in
associés à des protecteurs - Principes de conception et de Verbindung mit trennenden Schutzeinrichtungen - Leitsätze
choix (ISO 14119:2013) für Gestaltung und Auswahl (ISO 14119:2013)
This European Standard was approved by CEN on 24 August 2013.
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, 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: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14119:2013: E
worldwide for CEN national Members.
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SIST EN ISO 14119:2014
EN ISO 14119:2013 (E)
Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .4
2
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SIST EN ISO 14119:2014
EN ISO 14119:2013 (E)
Foreword
This document (EN ISO 14119:2013) 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 April 2014, and conflicting national standards shall be withdrawn at the
latest by April 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 1088:1995+A2:2008.
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.
For relationship with EU Directive, 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 14119:2013 has been approved by CEN as EN ISO 14119:2013 without any modification.
3
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SIST EN ISO 14119:2014
EN ISO 14119:2013 (E)
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive Machinery 2006/42/EC.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one Member State, compliance with the normative clauses of
this standard confers, within the limits of the scope of this standard, a presumption of conformity with the
relevant Essential Requirements 1.4.2.2 Interlocking movable guards of Annex I of that Directive and
associated EFTA regulations.
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within
the scope of this standard.
4
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SIST EN ISO 14119:2014
INTERNATIONAL ISO
STANDARD 14119
Second edition
2013-10-01
Safety of machinery — Interlocking
devices associated with guards —
Principles for design and selection
Sécurité des machines — Dispositifs de verrouillage associés à des
protecteurs — Principes de conception et de choix
Reference number
ISO 14119:2013(E)
©
ISO 2013
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SIST EN ISO 14119:2014
ISO 14119:2013(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2013
All rights reserved. Unless otherwise specified, 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
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SIST EN ISO 14119:2014
ISO 14119:2013(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Operating principles and typical forms of interlocking devices associated with guards .6
4.1 General . 6
4.2 Principles of guard interlocking without guard locking . 8
4.3 Principles of guard interlocking with guard locking . 8
5 Requirements for the design and the installation of interlocking devices with and without
guard locking .11
5.1 General .11
5.2 Arrangement and fastening of position switches .11
5.3 Arrangement and fastening of actuators .12
5.4 Actuation modes of interlocking devices .12
5.5 Interface to control systems .13
5.6 Mechanical stop .13
5.7 Additional requirements on guard locking devices .13
6 Selection of an interlocking device.18
6.1 General .18
6.2 Selection of a guard locking device .19
6.3 Environmental conditions considerations .21
7 Design to minimize defeat possibilities of interlocking devices .21
7.1 General .21
7.2 Additional measures to minimize defeat possibilities of interlocking devices .23
8 Control requirements .26
8.1 General .26
8.2 Assessment of faults .26
8.3 Prevention of common cause failures .27
8.4 Release of guard locking device .29
8.5 Fault exclusion .29
8.6 Logical series connection of interlocking devices .29
8.7 Electrical and environmental conditions .30
9 Information for use .30
9.1 General .30
9.2 Information for use given by the manufacturer of interlocking devices .30
9.3 Information for use given by the manufacturer of the machine .32
Annex A (informative) Type 1 interlocking device — Examples .33
Annex B (informative) Type 2 interlocking device — Examples .38
Annex C (informative) Type 3 interlocking device — Example.43
Annex D (informative) Type 4 interlocking devices — Examples .45
Annex E (informative) Examples of other interlocking devices .48
Annex F (informative) Example of guard locking devices .49
Annex G (informative) Application examples of interlocking devices used within a
safety function.55
Annex H (informative) Motivation to defeat interlocking device .61
© ISO 2013 – All rights reserved iii
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SIST EN ISO 14119:2014
ISO 14119:2013(E)
Annex I (informative) Examples for maximum static action forces .66
Bibliography .68
iv © ISO 2013 – All rights reserved
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SIST EN ISO 14119:2014
ISO 14119:2013(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. 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. 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 meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 199, Safety of machinery.
This second edition cancels and replaces the first edition (ISO 14119:1998), which has been technically
revised. It also incorporates Amendment ISO 14119:1998/Amd 1:2007. The main changes from the
previous edition comprise
— an improved structure as a result of the differentiation and definition of four types of interlocking
devices,
— a description of their technology and their typical characteristics in annexes,
— “defeat in a reasonably foreseeable manner” defined and considered,
— the measures required to minimize defeat possibilities, and
— the consideration of new technologies and the addition of informative Annexes G, H and I.
© ISO 2013 – All rights reserved v
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SIST EN ISO 14119:2014
ISO 14119:2013(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 type 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.
The requirements of this document can be supplemented or modified by a type-C standard.
For machines which are covered by the scope of a type-C standard and which have been designed and built
according to the requirements of that standard, the requirements of that type-C standard take precedence.
This International Standard has been prepared to give guidance to machinery designers and writers of
product safety standards on how to design and select interlocking devices associated with guards.
Relevant clauses of this International Standard, used alone or in conjunction with provisions from
other standards, may be used as a basis for verification procedures for the suitability of a device for
interlocking duties.
The informative Annexes A to F describe the technology and the typical characteristics of the defined
4 types of interlocking devices. Other solutions may be adopted, provided that they comply with the
principles of this standard. The informative Annexes G to I give information on particular aspects like
interlocking devices used within safety functions, risk assessment considering the motivation to defeat
and static action forces. ISO/TR 24119 is under preparation and will give information on the masking of
faults in series connection of interlocking devices.
vi © ISO 2013 – All rights reserved
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SIST EN ISO 14119:2014
INTERNATIONAL STANDARD ISO 14119:2013(E)
Safety of machinery — Interlocking devices associated
with guards — Principles for design and selection
1 Scope
This International Standard specifies principles for the design and selection — independent of the
nature of the energy source — of interlocking devices associated with guards.
This International Standard covers the parts of guards which actuate interlocking devices.
NOTE ISO 14120 specifies general requirements for the design and construction of guards provided primarily
to protect persons from mechanical hazards. The processing of the signal from the interlocking device to stop and
immobilize the machine is dealt with in ISO 13849-1 or IEC 62061.
This International Standard does not necessarily provide all the specific requirements for trapped key
systems.
This International Standard provides measures to minimize defeat of interlocking devices in a reasonably
foreseeable manner.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13849-1:2006, 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
IEC 60204-1:2009, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60947-5-3, Low-voltage switchgear and controlgear — Part 5-3: Control circuit devices and switching
elements — Requirements for proximity devices with defined behaviour under fault conditions (PDF)
IEC 62061:2012, 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, ISO 13849-1 and the
following apply.
3.1
interlocking device
interlock
mechanical, electrical or other type of device, the purpose of which is to prevent the operation of
hazardous machine functions under specified conditions (generally as long as a guard is not closed)
Note 1 to entry: See Figure 1 and Table 1.
[SOURCE: ISO 12100:2010, 3.28.1.]
© ISO 2013 – All rights reserved 1
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SIST EN ISO 14119:2014
ISO 14119:2013(E)
Key
1 guard 4 position switch
2 interlocking device 5 actuating system
3 actuator 6 output system
a
Direction of opening.
Figure 1 — Example of an interlocking device
3.2
interlocking guard
guard associated with an interlocking device so that, together with the control system of the machine,
the following functions are performed:
— the hazardous machine functions “covered” by the guard cannot operate until the guard is closed;
— if the guard is opened while hazardous machine functions are operating, a stop command is given;
— when the guard is closed, the hazardous machine functions “covered” by the guard can operate (the
closure of the guard does not by itself start the hazardous machine functions)
Note 1 to entry: An interlocking guard can contain/be equipped of one or more interlocking devices. These
interlocking devices can also be of different types.
[SOURCE: ISO 12100:2010, 3.27.4.]
3.3
interlocking guard with a start function
control guard
special form of an interlocking guard which, once it has reached its closed position, gives a command to
initiate the hazardous machine function(s) without the use of a separate start control
Note 1 to entry: ISO 12100:2010, 6.3.3.2.5 gives detailed provisions regarding the condition of use.
[SOURCE: ISO 12100:2010, 3.27.6.]
3.4
guard locking device
device intended to lock a guard in the closed position and linked to the control system
2 © ISO 2013 – All rights reserved
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SIST EN ISO 14119:2014
ISO 14119:2013(E)
3.5
interlocking guard with guard locking
guard associated with an interlocking device and a guard locking device so that, together with the
control system of the machine, the following functions are performed:
— the hazardous machine functions “covered” by the guard cannot operate until the guard is
closed and locked;
— the guard remains closed and locked until the risk due to the hazardous machine functions “covered”
by the guard has disappeared, and
— when the guard is closed and locked, the hazardous machine functions “covered” by the guard can operate
(the closure and locking of the guard do not by themselves start the hazardous machine functions)
[SOURCE: ISO 12100:2010, 3.27.5.]
3.6
safety–related part of a control system
SRP/CS
part of a control system that responds to safety-related input signals and generates safety-related
output signals
Note 1 to entry: The combined safety-related parts of a control system start at the point where the safety-related
input signals are initiated (including e.g. the actuating cam and the roller of the position switch) and end at the
output of the power control elements (including, for example, the main contacts of a contactor).
Note 2 to entry: If monitoring systems are used for diagnostics, they are also considered as SRP/CS.
[SOURCE: ISO 13849-1:2006, 3.1.1.]
3.7
defeat
action that makes interlocking devices inoperative or bypasses them with the result that a machine is
used in a manner not intended by the designer or without the necessary safety measures
3.8
defeat in a reasonably foreseeable manner
defeat of an interlocking device either manually or by using readily available objects
Note 1 to entry: This definition includes the removal of switches or actuators using tools that are needed for the
intended use of the machine or that are readily available (screw drivers, wrenches, hexagon keys, pliers).
Note 2 to entry: Readily available objects for substitute actuation include screws, needles and sheet-metal pieces,
objects in daily use such as keys, coins, adhesive tape, string and wire, spare keys for the trapped-key interlocking
devices, and spare actuators.
3.9
automatic monitoring
diagnostic function which initiates a fault reaction function if the ability of a component or an element to
perform its function is diminished, or if the process conditions are changed in such a way that hazards
are generated
3.10
direct mechanical action
positive mechanical action
movement of a mechanical component which arises inevitably from the movement of another mechanical
component either by direct contact or via rigid elements
© ISO 2013 – All rights reserved 3
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SIST EN ISO 14119:2014
ISO 14119:2013(E)
3.11
direct opening action
positive opening operation
achievement of contact separation as a direct result of a specified movement of the
switch actuator through non-resilient members (for example not dependent upon springs)
[SOURCE: IEC 60947-5-1:2003, K 2.2.]
3.12
actuator
separate part of an interlocking device which transmits the state of the guard (closed or not closed) to
the actuating system
EXAMPLE Guard-mounted cam, key, shaped tongue, reflector, magnet, RFID tag.
Note 1 to entry: See also Annexes A to E.
Note 2 to entry: Examples of actuators are shown in Figure 2.
3.13
coded actuator
actuator which is specially designed (e.g. by shape) to actuate a certain position switch
3.13.1
low level coded actuator
coded actuator for which 1 to 9 variations in code are available
3.13.2
medium level coded actuator
coded actuator for which 10 to 1 000 variations in code are available
3.13.3
high level coded actuator
coded actuator for which more than 1 000 variations are available
3.14
actuating system
part of the interlocking device which transmits the position of the actuator and changes the state of the
output system
EXAMPLE Roller plunger, cam mechanism, optical, inductive or capacitive sensor.
Note 1 to entry: Examples of actuating systems are shown in Figure 2.
3.15
output system
part of the interlocking device that indicates the state of the guard to the control system
EXAMPLE Contact element (electromechanical), semiconductor output, valve.
3.16
Type 1 interlocking device
interlocking device with mechanically actuated position switch with uncoded actuator
EXAMPLE Hinged interlocking devices.
Note 1 to entry: See Annex A for detaile
...
SLOVENSKI STANDARD
oSIST prEN ISO 14119:2011
01-december-2011
9DUQRVWVWURMHY=DSRUQHQDSUDYHSRYH]DQH]YDURYDOL1DþHOD]DQDþUWRYDQMHLQ
L]ELUR ,62',6
Safety of machinery - Interlocking devices associated with guards - Principles for design
and selection (ISO/DIS 14119:2011)
Sicherheit von Maschinen - Verriegelungseinrichtungen in Verbindung mit trennenden
Schutzeinrichtungen - Leitsätze für Gestaltung und Auswahl (ISO/DIS 14119:2011)
Sécurité des machines - Dispositifs de verrouillage associés à des protecteurs -
Principes de conception et de choix (ISO/DIS 14119:2011)
Ta slovenski standard je istoveten z: prEN ISO 14119
ICS:
13.110 Varnost strojev Safety of machinery
oSIST prEN ISO 14119:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 14119:2011
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oSIST prEN ISO 14119:2011
EUROPEAN STANDARD
DRAFT
prEN ISO 14119
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2011
ICS 13.110 Will supersede EN 1088:1995+A2:2008
English Version
Safety of machinery - Interlocking devices associated with
guards - Principles for design and selection (ISO/DIS
14119:2011)
Sécurité des machines - Dispositifs de verrouillage Sicherheit von Maschinen - Verriegelungseinrichtungen in
associés à des protecteurs - Principes de conception et de Verbindung mit trennenden Schutzeinrichtungen - Leitsätze
choix (ISO/DIS 14119:2011) für Gestaltung und Auswahl (ISO/DIS 14119:2011)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 114.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 14119:2011: E
worldwide for CEN national Members.
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oSIST prEN ISO 14119:2011
prEN ISO 14119:2011 (E)
Contents Page
Foreword .3
2
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oSIST prEN ISO 14119:2011
prEN ISO 14119:2011 (E)
Foreword
This document (prEN ISO 14119:2011) 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 document is currently submitted to the parallel Enquiry.
This document will supersede EN 1088:1995+A2:2008.
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).
Endorsement notice
The text of ISO/DIS 14119:2011 has been approved by CEN as a prEN ISO 14119:2011 without any
modification.
3
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oSIST prEN ISO 14119:2011
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oSIST prEN ISO 14119:2011
DRAFT INTERNATIONAL STANDARD ISO/DIS 14119
ISO/TC 199 Secretariat: DIN
Voting begins on Voting terminates on
2011-09-22 2012-02-22
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ ORGANISATION INTERNATIONALE DE NORMALISATION
Safety of machinery — Interlocking devices associated with
guards — Principles for design and selection
Sécurité des machines — Dispositifs de verrouillage associés à des protecteurs — Principes de conception et
de choix
[Revision of first edition (ISO 14119:1998) and ISO 14119:1998/Amd.1:2007]
ICS 13.110
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
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REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES,
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THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
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Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
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Contents Page
Foreword .v
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Operating principles and typical forms of interlocking devices associated with guards .7
4.1 General .7
4.2 Principles of guard interlocking without guard locking.8
4.3 Principles of guard interlocking with guard locking .8
5 Requirements for the design and the installation of interlocking devices with and without
guard locking .12
5.1 General .12
5.2 Additional requirements on guard locking devices.14
6 Selection of an interlocking device .18
6.1 General .18
6.2 Selection of a guard locking device .19
6.3 Environmental conditions considerations.21
7 Design to minimize defeat possibilities of interlocking devices.21
7.1 General .21
7.2 Additional measures to minimize defeat possibilities of interlocking devices .23
7.3 Design to minimize defeat of plug and socket interlocking devices .28
8 Control requirements .28
8.1 General .28
8.2 Assessment of faults .28
8.3 Prevention of common cause failures .29
8.4 Release of guard locking device.30
8.5 Fault exclusion .30
8.6 Logical series connection of interlocking devices .30
8.7 Electrical and environmental conditions .31
9 Information for use.31
9.1 General .31
9.2 Information for use given by the manufacturer of interlocking devices .31
9.3 Information for use given by the manufacturer of the machine.33
Annex A (informative) Example of Type 1 interlocking devices .34
Annex B (informative) Example of Type 2 interlocking devices .39
Annex C (informative) Example of Type 3 interlocking devices .43
Annex D (informative) Example of Type 4 interlocking devices .45
Annex E (informative) Example of other interlocking devices .48
Annex F (informative) Example of guard locking devices .49
Annex G (informative) Application examples of interlocking devices used within a safety function.54
Annex H (informative) Motivation to defeat interlocking device.61
Annex I (informative) Maximum static action forces.64
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Annex J (informative) Evaluation of fault masking serial connection of guard interlocking devices
with potential free contacts .65
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .69
Bibliography .70
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oSIST prEN ISO 14119:2011
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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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 14119 was prepared by Technical Committee ISO/TC 199, Safety of machinery, and by Technical
Committee CEN/TC 114, Safety of machinery in collaboration.
This second edition cancels and replaces the first edition (ISO 14119:1998) and ISO 14119 AMD:1:2007 and
contains the following features:
⎯ improved structure as a result of the differentiation and definition of four types of interlocking devices;
⎯ description of their technology and their advantages and disadvantages in the annexes;
⎯ “defeat in a reasonably foreseeable manner” defined and considered;
⎯ required measures to minimize defeat possibilities as a result of a risk assessment;
⎯ new technologies are considered and new informative Annexes G, H, I and J are added.
NOTE By agreement between ISO and CEN, the CEN specific paragraphs and annexes are included up to the FDIS,
but will not appear in the published ISO standard.
Introduction
The structure of safety standards in the field of machinery is as follows:
⎯ type-A standards (basic safety standards) giving basic concepts, principles for design and general
aspects that can be applied to machinery;
⎯ type-B standards (generic safety standards) dealing with one safety aspect or one type of safeguard that
can be used across a wide range of machinery:
⎯ type-B1 standards on particular safety aspects (for example, safety distances, surface temperature,
noise);
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⎯ type-B2 standards on safeguards (for example, two-hand controls, interlocking devices, pressure-
sensitive devices, guards);
⎯ 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.
The requirements of this document can be supplemented or modified by a type-C standard.
For machines which are covered by the scope of a type-C standard and which have been designed and built
according to the requirements of that standard, the requirements of that type-C standard take precedence.
This International Standard has been prepared to give guidance to machinery designers and writers of product
safety standards on how to design and select interlocking devices associated with guards.
Relevant clauses of this International Standard, used alone or in conjunction with provisions from other
standards, may be used as a basis for verification procedures for the suitability of a device for interlocking
duties.
The informative Annexes A to F describe the technology and the advantages and disadvantages of the
defined 4 types of interlocking devices. Other solutions may be adopted, provided that they comply with the
principles of this standard. The informative Annexes G to J give information on particular aspects like
interlocking devices used within safety functions, risk assessment considering the motivation to defeat, static
action forces and masking of faults in series connection of interlocking devices.
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oSIST prEN ISO 14119:2011
DRAFT INTERNATIONAL STANDARD ISO/DIS 14119
Safety of machinery — Interlocking devices associated with
guards — Principles for design and selection
1 Scope
This International Standard specifies principles for the design and selection – independent of the nature of the
energy source – of interlocking devices associated with guards.
It also provides requirements specifically intended for electrical interlocking devices.
This International Standard covers the parts of guards which actuate interlocking devices.
NOTE Requirements for guards are given in ISO 14120. The processing of the signal from the interlocking device to
stop and immobilize the machine is dealt with in ISO 13849-1.
This International standard is intended to provide measures to minimize defeat of interlocking devices in a
reasonably foreseeable manner.
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.
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction
ISO 13849-1:2006, Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13849-2:2003, Safety of machinery — Safety-related parts of control systems — Part 2: Validation
ISO 13855:2010, Safety of machinery — Positioning of protective equipment with respect to the approach
speeds of parts of the human body
ISO 13857, Safety of machinery — Safety distances to prevent hazard zones being reached by the upper and
lower limbs
ISO 14118:2000, Safety of machinery — Prevention of unexpected start-up
ISO 14120:2002, Safety of machinery — Guards — General requirements for the design and construction of
fixed and movable guards
IEC 60204-1:2005, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60947-5-1:2003, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and
switching elements — Electromechanical control circuit devices
IEC 60947-5-2, Low-voltage switchgear and controlgear — Part 5-2: Control circuit devices and switching
elements — Proximity switches
IEC 60947-5-3, Low-voltage switchgear and controlgear — Part 5-3: Control circuit devices and switching
elements — Requirements for proximity devices with defined behaviour under fault conditions (PDF)
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IEC 62061:2005, 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 12100:2010, ISO 13849-1:2006 and
the following apply.
3.1
interlocking device
interlock
mechanical, electrical or other type of device, the purpose of which is to prevent the operation of hazardous
machine functions under specified conditions (generally as long as a guard is not closed)
[ISO 12100:2010, 3.28.1]
NOTE See Figure 1 and Table 1.
Key
1 guard 4 position switch
2 interlocking device 5 actuating system
3 actuator (cam) 6 output system
a
direction of opening
Figure 1 — Example of an interlocking device
3.2
interlocking guard
guard associated with an interlocking device so that, together with the control system of the machine, the
following functions are performed:
⎯ the hazardous machine functions "covered" by the guard cannot operate until the guard is closed;
⎯ if the guard is opened while hazardous machine functions are operating, a stop command is given;
⎯ when the guard is closed, the hazardous machine functions "covered" by the guard can operate. The
closure of the guard does not by itself start the hazardous machine functions.
[ISO 12100:2010, 3.27.4]
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3.3
interlocking guard with a start function
control guard
special form of an interlocking guard which, once it has reached its closed position, gives a command to
initiate the hazardous machine function(s) without the use of a separate start control
NOTE ISO 12100:2010, 6.3.3.2.5 gives detailed provisions regarding the condition of use.
[ISO 12100:2010, 3.27.6]
3.4
guard locking device
device intended to lock a guard in the closed position and linked to the control system
3.5
interlocking guard with guard locking
guard associated with an interlocking device and a guard locking device so that, together with the control
system of the machine, the following functions are performed:
⎯ the hazardous machine functions covered by the guard cannot operate unless the guard is in the closed
position and locked;
⎯ the guard remains closed and locked until the risk due to the hazardous machine functions covered by
the guard has disappeared.
[ISO 12100:2010, 3.27.5, modified]
3.6
safety–related part of a control system
SRP/CS
part of a control system that responds to safety-related input signals and generates safety-related output
signals
NOTE 1 The combined safety-related parts of a control system start at the point where the safety-related input signals
are initiated (including e.g. the actuating cam and the roller of the position switch) and end at the output of the power
control elements (including, for example, the main contacts of a contactor).
NOTE 2 If monitoring systems are used for diagnostics, they are also considered as SRP/CS.
[ISO 13849-1:2006, 3.1.1]
3.7
defeat
action that makes interlocking devices inoperative or bypasses them with the result that a machine is used in
a manner not intended by the designer or without the necessary safety measures
3.8
defeat in a reasonably foreseeable manner
defeat of an interlocking device either manually or by using readily available objects
NOTE 1 This definition includes the removal of switches or actuators using tools that are needed for the intended use
of the machine or that are readily available (screw drivers, wrenches, hexagon keys, pliers).
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NOTE 2 Readily available objects for substitute actuation can be:
⎯ screws, needles, sheet-metal pieces;
⎯ objects in daily use such as keys, coins, adhesive tape, string and wire;
⎯ spare keys for the trapped-key interlocking devices;
⎯ spare actuators.
3.9
automatic monitoring
diagnostic function which ensures that a safety measure is initiated if the ability of a component or an element
to perform its function is diminished, or if the process conditions are changed in such a way that hazards are
generated
3.10
direct mechanical action
positive mechanical action
movement of a mechanical component which depends inevitably from the movement of another mechanical
component either by direct contact or via rigid elements
3.11
direct opening action (of a contact element)
positive opening operation
achievement of contact separation as a direct result of a specified movement of the switch actuator through
non-resilient members (for example not dependent upon springs)
[IEC 60947-5-1:2003, K 2.2]
3.12
actuator
separate part of an interlocking device which transmits the state of the guard (closed or not closed) to the
actuating system
NOTE 1 A guard mounted cam, a key, a shaped tongue, a reflector, a magnet, an RFID tag are examples of actuators.
NOTE 2 See also Annex A to E.
NOTE 3 See examples of actuators in Figure 2.
3.13
coded actuator
actuator which is specially designed (e. g. by shape) to actuate a certain position switch
3.13.1
low level coded actuator
coded actuator for which the number of code versions available need to be 1 to 9
3.13.2
medium level coded actuator
coded actuator for which the number of code versions available need to be 10 to ≤ 1 000
3.13.3
high level coded actuator
coded actuator for which the number of code versions available need to be > 1 000
3.14
actuating system
part of the interlocking device which transmits the position of the actuator and changes the state of the output
system
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NOTE 1 A roller plunger, a cam linkage system, an optical, inductive or capacitive sensor are examples of an actuating
system.
NOTE 2 See examples of actuating systems in Figure 2.
3.15
output system
part of the interlocking device that indicates the state of the guard to the control system
NOTE 1 A contact element (electromechanical), a semi conductor output, a valve are examples of output systems.
NOTE 2 See examples of output systems in Figure 2.
3.16
Type 1 interlocking device
uncoded cam-operated interlocking device, in which actuator and actuating system are separate from each
other and suitable designed to go together
NOTE 1 Hinge-operated interlocking devices are examples of Type 1 interlocking devices.
NOTE 2 For examples see Annex A.
3.17
Type 2 interlocking device
coded tongue-operated interlocking device, whose actuator and actuating system are separate from each
other and suitable designed to go together
NOTE For examples see Annex B.
3.18
Type 3 interlocking device
uncoded non-mechanically actuated position switch, whose actuator and actuating system are separate from
each other
NOTE 1 Proximity switches are examples of Type 3 interlocking devices.
NOTE 2 For examples see Annex C.
3.19
Type 4 interlocking device
coded non-mechanically actuated position switch, whose actuator and actuating system are separate from
each other
NOTE 1 RFID tag operated switches are examples of Type 4 interlocking devices.
NOTE 2 For examples see Annex D.
3.20
stop command
signal generated by the interlocking device that causes the hazardous machine function to cease
NOTE This can include the stopping of hazardous machine movements or the reduction of the risk to an acceptable
level.
3.21
overall system stopping performance
time interval between the stop command given by opening the guard and the termination of the hazardous
machine function
NOTE Adapted from ISO 13855:2010, 3.1.2.
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3.22
access time
time taken by a person to reach the hazard zone after initiation of the stop command by the interlocking
device,
...
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