Safety of machinery - Prevention of unexpected start-up (ISO 14118:2017)

ISO 14118:2017 specifies requirements for designed-in means aimed at preventing unexpected machine start-up (see 3.2) to allow safe human interventions in danger zones (see Annex A).
ISO 14118:2017 applies to unexpected start-up from all types of energy source, i.e.:
- power supply, e.g. electrical, hydraulic, pneumatic;
- stored energy due to, e.g. gravity, compressed springs;
- external influences, e.g. from wind.
ISO 14118:2017 does not specify performance levels or safety integrity levels for safety-related parts of control systems. While available means to prevent unexpected start-up are identified, this document does not specify the means for the prevention of unexpected machine start-up for specific machines.
NOTE A type-C standard can define the required means for the prevention of harm arising from unexpected start-up. Otherwise, the requirements for a specific machine need to be determined by risk assessment outside the scope of this document.

Sicherheit von Maschinen - Vermeidung von unerwartetem Anlauf (ISO 14118:2017)

Dieses Dokument legt konstruktive Maßnahmen fest, die darauf gerichtet sind, unerwarteten Anlauf (siehe 3.2) zu vermeiden, um sicheren Eingriff von Personen in Gefahrbereiche (siehe Anhang A) zu ermöglichen.
Dieses Dokument bezieht sich auf unerwarteten Anlauf durch alle Arten von Energie, d. h.:
—   Energieversorgung, z. B. elektrisch, hydraulisch, pneumatisch;
—   gespeicherte Energie, z. B. durch Schwerkraft, gespannte Federn;
—   äußere Einflüsse, z. B. durch Wind.
In diesem Dokument werden keine Performance Level oder Sicherheits-Integritätslevel für sicherheitsrelevante Teile von Steuerungssystemen festgelegt. Obwohl Maßnahmen zur Vermeidung von unerwartetem Anlauf bekannt sind, werden in diesem Dokument nicht die Maßnahmen zur Vermeidung eines unerwarteten Anlaufs für bestimmte Maschinen festgelegt.
ANMERKUNG   Eine Typ-C-Norm kann die erforderlichen Maßnahmen zur Verhinderung von Schäden aufgrund eines unerwarteten Anlaufs definieren. Andernfalls müssen die Anforderungen für eine bestimmte Maschine durch eine Risikobewertung außerhalb des Geltungsbereichs dieses Dokuments festgelegt werden.

Sécurité des machines - Prévention de la mise en marche intempestive (ISO 14118:2017)

ISO 14118:2017 spécifie des exigences pour les mesures de sécurité intégrée destinées à empêcher la mise en marche intempestive d'une machine (voir 3.2), afin de permettre des interventions humaines en toute sécurité dans des zones dangereuses (voir l'Annexe A).
ISO 14118:2017 s'applique à la mise en marche intempestive depuis tous les types de source d'énergie, c'est-à-dire:
- alimentation en énergie, par exemple électrique, hydraulique, pneumatique;
- énergie emmagasinée en raison, par exemple, de la pesanteur, de ressorts comprimés;
- influences externes, par exemple effets du vent.
ISO 14118:2017 ne spécifie pas de niveaux de performance ou d'intégrité de sécurité pour les parties de systèmes de commande relatives à la sécurité. Même si le présent document identifie les moyens disponibles pour la prévention de la mise en marche intempestive, il ne spécifie pas les moyens de préventions de mise en marche intempestive pour des machines spécifiques.
NOTE Une norme de type C peut définir les moyens exigés pour la prévention de dommage lié à la mise en marche intempestive. Dans le cas contraire, il convient de déterminer les exigences d'une machine spécifique par une appréciation du risque n'étant pas inclue dans le domaine d'application du présent document.

Varnost strojev - Preprečevanje nepričakovanega zagona (ISO 14118:2017)

Ta evropski standard določa projektirana sredstva, ki so predvidena za preprečevanje nepričakovanega zagona stroja zaradi omogočanja varnih intervencij ljudi na nevarnih območjih. Uporablja se za nepričakovane zagone na podlagi vseh vrst virov energije, tj. napajanja, npr. električne, hidravlične, pnevmatske, shranjene energije zaradi npr. gravitacije, stisnjenih vzmeti in zunanjih vplivov, npr. vetra.

General Information

Status
Published
Publication Date
06-Feb-2018
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
07-Feb-2018
Completion Date
07-Feb-2018

RELATIONS

Buy Standard

Standard
EN ISO 14118:2018
English language
21 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 14118:2018
01-maj-2018
1DGRPHãþD
SIST EN 1037:1999+A1:2008
9DUQRVWVWURMHY3UHSUHþHYDQMHQHSULþDNRYDQHJD]DJRQD ,62
Safety of machinery - Prevention of unexpected start-up (ISO 14118:2017)
Sicherheit von Maschinen - Vermeidung von unerwartetem Anlauf (ISO 14118:2017)
Sécurité des machines - Prévention de la mise en marche intempestive (ISO
14118:2017)
Ta slovenski standard je istoveten z: EN ISO 14118:2018
ICS:
13.110 Varnost strojev Safety of machinery
SIST EN ISO 14118:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 14118:2018
---------------------- Page: 2 ----------------------
SIST EN ISO 14118:2018
EN ISO 14118
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2018
EUROPÄISCHE NORM
ICS 13.110 Supersedes EN 1037:1995+A1:2008
English Version
Safety of machinery - Prevention of unexpected start-up
(ISO 14118:2017)

Sécurité des machines - Prévention de la mise en Sicherheit von Maschinen - Vermeidung von

marche intempestive (ISO 14118:2017) unerwartetem Anlauf (ISO 14118:2017)
This European Standard was approved by CEN on 7 October 2017.

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

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14118:2018 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 14118:2018
EN ISO 14118:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Annex ZA (informative) Relationship between this International Standard and the essential

requirements of Directive 2006/42/EC aimed to be covered ........................................................ 4

---------------------- Page: 4 ----------------------
SIST EN ISO 14118:2018
EN ISO 14118:2018 (E)
European foreword

This document (EN ISO 14118:2018) 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 August 2018, and conflicting national standards shall

be withdrawn at the latest by August 2018.

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 1037:1995+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 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 organisations 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 14118:2017 has been approved by CEN as EN ISO 14118:2018 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 14118:2018
EN ISO 14118:2018 (E)
Annex ZA
(informative)
Relationship between this International Standard and the essential
requirements of Directive 2006/42/EC aimed to be covered

This International Standard has been prepared under a Commission’s standardization request M/396

to provide one voluntary means of conforming to essential requirements of Directive 2006/42/EC.

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 International Standard and Directive 2006/42/EC

Essential Requirements of Clause(s)/subclause(s) of Remarks/Notes
Directive 2006/42/EC this standard
Within the limits of the scope All normative clauses
all
relevant essential
requirements
are covered

WARNING 1 — Presumption of conformity stays valid only as long as a reference to this International

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 product(s) falling within the scope of

this standard.
---------------------- Page: 6 ----------------------
SIST EN ISO 14118:2018
INTERNATIONAL ISO
STANDARD 14118
Second edition
2017-12
Safety of machinery — Prevention of
unexpected start-up
Sécurité des machines — Prévention de la mise en marche
intempestive
Reference number
ISO 14118:2017(E)
ISO 2017
---------------------- Page: 7 ----------------------
SIST EN ISO 14118:2018
ISO 14118:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 14118:2018
ISO 14118:2017(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General measures to prevent unexpected start-up .......................................................................................................... 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Manual measures for isolation and energy dissipation ....................................................................................... 3

4.3 Other means to prevent unexpected (unintended) start-up ........................................................................... 3

4.4 Signalling and warning (delayed start) .............................................................................................................................. 3

5 Isolation and energy dissipation ......................................................................................................................................................... 3

5.1 Prevention of unexpected start-up upon restoration of any power supplies ................................... 3

5.2 Devices for isolation from power supplies ..................................................................................................................... 3

5.3 Locking (securing) devices ........................................................................................................................................................... 4

5.4 Devices for stored-energy dissipation or restraint (containment) ........................................................... 4

5.4.1 General...................................................................................................................................................................................... 4

5.4.2 Mechanical elements .................................................................................................................................................... 5

5.4.3 Locking or securing facilities for the restraint (containment) devices............................. 5

6 Other measures to prevent unexpected start-up ................................................................................................................ 5

6.1 Design strategy ....................................................................................................................................................................................... 5

6.2 Measures to prevent unintended generation of start commands ............................................................... 6

6.2.1 Measures to prevent unintended actuation of manual start controls ............................... 6

6.2.2 Design of safety-related parts of the control system ........................................................................ 7

6.2.3 Selection and location of power control elements ............................................................................. 7

6.3 Measures to maintain stop commands .............................................................................................................................. 7

6.3.1 Principle .................................................................................................................................................................................. 7

6.3.2 Maintained stop command generated by a stop control device (level A)....................... 7

6.3.3 Maintained stop command generated by machine control (level B/C)............................ 8

6.3.4 Mechanical disconnection (level D; see Figure 1) ............................................................................... 8

6.3.5 Moving-part immobilization (level E; see Figure 1) .......................................................................... 8

6.4 Automatic monitoring of the safe state (stopped condition) during a category 2 stop ........... 8

7 Design requirements for verification ............................................................................................................................................. 8

7.1 General ........................................................................................................................................................................................................... 8

7.2 Provisions for verifying isolation ............................................................................................................................................ 9

7.3 Provisions for verifying energy dissipation or restraint (containment)............................................... 9

Annex A (informative) Examples of tasks which can require the presence of persons in

danger zones ..........................................................................................................................................................................................................10

Bibliography .............................................................................................................................................................................................................................11

© ISO 2017 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 14118:2018
ISO 14118:2017(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 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.

This second edition cancels and replaces the first edition (ISO 14118:2000), which has been technically

revised and contains the following changes:
— the text has been edited to facilitate implementation of this document;

— the Scope has been redefined to exclude the specification of performance levels or safety integrity

levels for safety-related parts of control systems;
— Figure 1 has been updated.
iv © ISO 2017 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 14118:2018
ISO 14118:2017(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-B 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 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.

Keeping a machine in a stopped condition while persons are present in danger zones is one of the most

important conditions of the safe use of machinery and hence, one of the major aims of the machine

designer and machine user.

In the past, the concepts of “operating machine” and “stopped machine” were generally unambiguous; a

machine was
— operating when its movable elements or some of them were moving;
— stopped when its movable elements were at rest.

Machine automation has made the relationship between “operating” and “moving” on one hand and

“stopped” and “at rest” on the other hand, more difficult to define. Automation has also increased the

© ISO 2017 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 14118:2018
ISO 14118:2017(E)

potential for unexpected start-up and a significant number of hazardous events have occurred where

machines, stopped for diagnostic work or corrective actions, started up unexpectedly.

Hazards other than mechanical hazards generated by movable elements (e.g. from a laser beam) also

need to be taken into account.

The risk assessment relating to the presence of persons in a danger zone of a stopped machine needs to

take into account the probability of an unexpected start-up of the hazard-generating elements.

This document provides machine designers and machinery safety standard technical committees with

samples of built-in measures which can be used to prevent unexpected start-up.
vi © ISO 2017 – All rights reserved
---------------------- Page: 12 ----------------------
SIST EN ISO 14118:2018
INTERNATIONAL STANDARD ISO 14118:2017(E)
Safety of machinery — Prevention of unexpected start-up
1 Scope

This document specifies requirements for designed-in means aimed at preventing unexpected machine

start-up (see 3.2) to allow safe human interventions in danger zones (see Annex A).

This document applies to unexpected start-up from all types of energy source, i.e.:

— power supply, e.g. electrical, hydraulic, pneumatic;
— stored energy due to, e.g. gravity, compressed springs;
— external influences, e.g. from wind.

This document does not specify performance levels or safety integrity levels for safety-related parts of

control systems. While available means to prevent unexpected start-up are identified, this document

does not specify the means for the prevention of unexpected machine start-up for specific machines.

NOTE A type-C standard can define the required means for the prevention of harm arising from unexpected

start-up. Otherwise, the requirements for a specific machine need to be determined by risk assessment outside

the scope of this document.
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, Safety of machinery — Safety-related parts of control systems — Part 1: General principles

for design

IEC 62061, 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 and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1
start-up
machine start-up
change from rest to motion or switch-on of a machine or of one of its parts

Note 1 to entry: An example of function other than motion is switch-on of a laser.

© ISO 2017 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 14118:2018
ISO 14118:2017(E)
3.2
unexpected start-up
unintended start-up

start-up (3.1) which, because of its unexpected nature, generates a risk to persons

Note 1 to entry: This can be caused by, for example:

— a start command which is the result of a failure in or an external influence on the control system;

— a start command generated by inopportune action on a start control or other parts of the machine such as a

sensor or a power control element;
— restoration of the power supply after an interruption;

— external/internal influences (gravity, wind, self-ignition in internal combustion engines, etc.) on parts of the

machine.

Note 2 to entry: Machine start-up during the normal sequence of an automatic cycle is not unintended, but can

be considered as being unexpected from the point of view of the operator. Prevention of hazardous events in this

case involves the use of safeguarding measures (see 6.3).
3.3
isolation and energy dissipation
procedure which consists of all of the four following actions:

a) isolating (disconnecting, separating) the machine (or defined parts of the machine) from all power

supplies;

b) locking (or otherwise securing), if necessary (for instance, when the operator is not able, from

every location he may be at, to check that the power supply remains interrupted), all the isolating

units in the “isolated” position;

c) dissipating or restraining (containing) any stored energy which may give rise to a hazard.

Note 1 to entry Energy considered in c) may be stored in e.g. mechanical parts continuing to move

through inertia, e.g. backdriving of a ventilation fan, mechanical parts liable to move by gravity, capacitors

and accumulators, pressurized fluids and springs.

d) verifying by using a safe working procedure (e.g. by measuring) that the actions taken according to

a), b) and c) have produced the desired effect.
4 General measures to prevent unexpected start-up
4.1 General

A risk assessment in accordance with ISO 12100 shall be performed to identify the required measures

to prevent unexpected start-up.

NOTE Measures to prevent unexpected start-up of specific machinery can be specified in a type-C standard.

The machine manufacturer is responsible for the suitability of measures identified by risk assessment.

The necessary procedures to prevent unexpected start-up including energy dissipation or restraint

(containment) and verification method if necessary, shall be described in the instruction handbook

of the machine and/or in warnings on the machine itself. The instructions should be provided with

respect to each;
— source of energy;
— means;
— task (see Annex A);
2 © ISO 2017 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 14118:2018
ISO 14118:2017(E)
— level (see Figure 1).
4.2 Manual measures for isolation and energy dissipation

Machines shall be provided with manually operated devices for isolation of energy supplies and

energy dissipation (see Clause 5), considering the required task to be performed with the machine, e.g.

maintenance, work on power circuits and decommissioning.
4.3 Other means to prevent unexpected (unintended) start-up

If the use of manual isolation and energy dissipation is not appropriate for frequent short interventions,

the designer shall provide additional automatic controlled functions (see Clause 6) to prevent

unexpected start-up.

NOTE 1 Examples of tasks which can require the presence of persons in danger zones are given in Annex A.

The designer should determine as completely as possible the different machine operating and stopping

modes and the need for the presence of persons in danger zones. Appropriate safety measures can then

be provided. These measures are intended to prevent operators from being induced to use hazardous

operating modes and hazardous intervention techniques caused by technical difficulties in the use of

the machine.
4.4 Signalling and warning (delayed start)

When required by the risk assessment, an audible and/or visible warning signal and delayed start shall

be provided as a means to prevent injury from the unexpected start-up of machinery.

The warning signal shall be audible and/or visual to alert exposed person(s) of the impending start-up.

The duration of the warning signal and the period of time corresponding to the delayed start-up shall

last long enough to enable the persons either to leave the danger zone before the machine starts or to

prevent the machine starting, e.g. by actuating an emergency stop device.

A warning signal and delayed start-up shall be provided when all danger zones cannot be seen from

the operator control station or when the presence of persons in danger zones cannot be detected or

excluded.

Where applicable, machinery should provide an indication of different states related to start-up, e.g.

“waiting for a start command”, “waiting for material”, “power on”, etc.
5 Isolation and energy dissipation
5.1 Prevention of unexpected start-up upon restoration of any power supplies

Risks need to be considered where it is expected that the restoration or start-up after the energy

dissipation or interruption could lead to unexpected movements.
Where necessary, (an) appropriate measure(s) to prevent it shall be taken.
5.2 Devices for isolation from power supplies
5.2.1 Isolation devices shall:
— ensure a reliable disconnection or separation from the energy source;

— have a reliable mechanical link between the manual control and the isolating element(s);

— be equipped with clear and unambiguous identification of the state of the isolation device which

corresponds to each position of its manual control (actuator).
© ISO 2017 – All rights reserved 3
---------------------- Page: 15 ----------------------
SIST EN ISO 14118:2018
ISO 14118:2017(E)

NOTE 1 For electrical equipment, a supply disconnecting (isolating) device complying with IEC 60204-1:2016,

5.3 meets this requirement.

NOTE 2 Plug and socket systems (for electrical supplies) or their pneumatic, hydraulic or mechanical

equivalents, are examples of isolating devices with which it is possible to achieve a visible and reliable

discontinuity in the power supply circuits. For electrical plug/socket combinations, see IEC 60204-1:2016, 5.3.2

e) and 5.3.3.

NOTE 3 For hydraulic and pneumatic equipment; see also ISO 4413:2010, 5.4.7.2.1 and ISO 4414:2010, 5.2.8.

5.2.2 The location and number of isolation devices will be determined by risk assessment while taking

into account the configuration of the machine, the need for the presence of persons in danger zones and

the task to be performed. Each isolation device shall be readily identifiable as to which machine, or part

of it, it isolates (e.g. by durable marking where necessary).

Isolation of only part of a machine shall not create a hazard due to operation of other parts of the

machine.
NOTE 1 For electrical equipment of machinery, see also IEC 60204-1:2016, 5.4.

NOTE 2 For large machinery where it is necessary to have access to individual parts of a machine, separate

additional isolation devices can be required.
NOTE 3 The loca
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.