Safety of machinery - Interlocking devices associated with guards - Principles for design and selection (ISO 14119:2013)

ISO 14119:2013 specifies principles for the design and selection ? independent of the nature of the energy source ? of interlocking devices associated with guards.It covers the parts of guards which actuate interlocking devices. It does not necessarily provide all the specific requirements for trapped key systems.
ISO 14119:2013 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

Status
Published
Publication Date
01-Oct-2013
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
02-Oct-2013
Completion Date
02-Oct-2013

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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

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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.

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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.
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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
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
...

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