EN ISO 13856-3:2013

Safety of machinery - Pressure-sensitive protective devices - Part 3: General principles for design and testing of pressure-sensitive bumpers, plates, wires and similar devices (ISO 13856-3:2013)

ISO 13856-3:2013 establishes general principles and specifies requirements for the design and testing of those pressure-sensitive protective devices, with or without an external reset facility, that are not specified in either ISO 13856‑1 or ISO 13856‑2, and the majority of which are produced for specific applications and are not available as "off-the-shelf" items.
ISO 13856-3:2013 also gives specific requirements for the following pressure-sensitive protective devices: pressure-sensitive bumpers; pressure-sensitive plates; pressure-sensitive wires (trip wires).
It deals with the design of a pressure-sensitive device with regard to safety and reliability rather than its suitability for particular applications.
It is not applicable to specifying the dimensions of pressure-sensitive protective devices in relation to any particular application, or stopping devices according to IEC 60204‑1 used for the normal operation, including emergency stopping of machinery.
While requirements are given for the immunity of the device to electromagnetic disturbances, these are not intended to cover all aspects of electromagnetic compatibility (EMC).

Sicherheit von Maschinen - Druckempfindliche Schutzeinrichtungen - Teil 3: Allgemeine Leitsätze für die Gestaltung und Prüfung von Schaltpuffern, Schaltflächen, Schaltleinen und ähnlichen Einrichtungen (ISO 13856-3:2013)

Dieser Teil von ISO 13856 stellt allgemeine Leitsätze auf und legt Anforderungen an die Gestaltung und Prüfung derjenigen druckempfindlichen Schutzeinrichtungen mit oder ohne Rückstelleinrichtung fest, die weder in ISO 13856-1 noch in ISO 13856-2 beschrieben werden; die Mehrzahl dieser Schutzeinrichtungen wird für bestimmte Anwendungen hergestellt und ist nicht als übliche Handelsware erhältlich.
Dieser Teil von ISO 13856 enthält außerdem besondere Anforderungen an folgende druckempfindliche Schutzeinrichtungen:
a) Schaltpuffer;
b) Schaltflächen;
c) Schaltleinen.
Dieser Teil von ISO 13856 behandelt vielmehr die Gestaltung von druckempfindlichen Schutzeinrichtungen im Hinblick auf deren Sicherheit und Zuverlässigkeit, als im Hinblick auf deren Eignung für bestimmte Anwendungen.
ANMERKUNG 1 Für die Beziehung zwischen Sicherheit und Zuverlässigkeit siehe ISO 13849-1:2006, 4.2.
ANMERKUNG 2 Der Hersteller und/oder Anwender der Maschinen trägt die Verantwortung für die Installation von geeigneten Arten von Schutzeinrichtungen auf Grundlage einer Risikobeurteilung.
Dieser Teil von ISO 13856 gilt nicht für
 die Festlegung von Maßen von druckempfindlichen Schutzeinrichtungen in Bezug auf eine bestimmte Anwendung, oder
 Stoppeinrichtungen nach IEC 60204-1, die nur für den Normalbetrieb von Maschinen einschließlich Not-Halt verwendet werden.
ANMERKUNG 3 Spezielle Anforderungen für besondere Anwendungen sind dafür vorgesehen, in entsprechenden Typ-C-Normen dargelegt zu werden (siehe ISO 12100 und Einleitung).
Zusätzliche Anforderungen können erforderlich sein, wenn druckempfindliche Schutzeinrichtungen an Orten zum Einsatz kommen, die für ältere oder behinderte Personen oder für Kinder zugänglich sind.
ANMERKUNG 4 Auch wenn Anforderungen an die Störfestigkeit der Einrichtung gegenüber elektromagnetischen Störungen angegeben sind, decken diese nicht sämtliche Aspekte der elektromagnetischen Verträglichkeit (EMV) ab.

Sécurité des machines - Dispositifs de protection sensibles à la pression - Partie 3: Principes généraux de conception et d'essai des pare-chocs, plaques, câbles et dispositifs analogues sensibles à la pression (ISO 13856-3:2013)

L'ISO 13856-3:2013 établit les principes généraux et spécifie les exigences relatives à la conception et aux essais des dispositifs de protection sensibles à la pression, avec ou sans installation de réarmement extérieure, qui ne sont pas spécifiées dans l'ISO 13856-1 et l'ISO 13856-2, la majorité de ces dispositifs étant fabriquée pour des applications spécifiques et n'étant pas disponible sur catalogue.
L'ISO 13856-3:2013 donne également des exigences spécifiques pour les dispositifs de protection sensibles à la pression suivants: pare-chocs sensibles à la pression; plaques sensibles à la pression; câbles sensibles à la pression (câbles de détection de passage).
Elle traite de la conception des dispositifs sensibles à la pression et concerne davantage la sécurité et la fiabilité que son adéquation pour des applications particulières.
Elle ne s'applique pas à la spécification des dimensions des dispositifs de protection sensibles à la pression pour les applications particulières, ou aux dispositifs d'arrêt conformes à la CEI 60204-1 utilisés pour le fonctionnement normal des machines, y compris l'arrêt d'urgence.
Bien que les exigences sont données pour l'immunité du dispositif aux perturbations électromagnétiques, elles ne visent pas à couvrir tous les aspects de la compatibilité électromagnétique (CEM).

Varnost strojev - Varovalne naprave, občutljive na tlak - 3. del: Splošna načela za načrtovanje in preskušanje odbojnikov, plošč, žic in podobnih naprav, občutljivih na tlak (ISO 13856-3:2013)

Ta del standarda ISO 13856 določa splošna načela in zahteve za načrtovanje in preskušanje na pritisk občutljivih zaščitnih naprav z zunanjo ponastavitveno funkcijo ali brez nje, ki niso določene v standardu ISO 13856-1 ali ISO 13856-2 in katerih večina je proizvedena za točno določeno uporabo ter ni na voljo v trgovinah. Ta del standarda ISO 13856 določa posebne zahteve za naslednje na pritisk občutljive zaščitne naprave:
a) odbijači, občutljivi na pritisk;
b) plošče, občutljive na pritisk;
c) žice, občutljive na pritisk (sprožilne žice).
Standard obravnava zasnovo naprave, občutljive na pritisk, glede na varnost in zanesljivost, in ne glede na primernost za določene uporabe.
OPOMBA 1: Za razmerje med varnostjo in zanesljivostjo glej standard ISO 13849-1:2006, 4.2.
OPOMBA 2: Proizvajalec stroja in/ali uporabnik je glede na oceno tveganja odgovoren za namestitev primernih vrst zaščitnih naprav.
Standard se ne uporablja za:
– določanje dimenzij zaščitnih naprav, občutljivih na pritisk, v povezavi s katero koli posamezno uporabo ali
– naprave za zaustavljanje v skladu s standardom IEC 60204-1, ki se uporabljajo za običajno delovanje, vključno z zaustavitvijo stroja v sili.
OPOMBA 3: Posebne zahteve za določene uporabe bodo določene v ustreznih standardih tipa C (glej standard ISO 12100 in uvod).
Dodatne zahteve so lahko potrebne, če se zaščitne naprave, občutljive na tlak, uporabljajo na mestih, do katerih imajo dostop starejše osebe, invalidi ali otroci.
OPOMBA 4: Čeprav so zahteve opredeljene glede odpornosti naprave na elektromagnetne motnje, niso namenjene pokritju vseh vidikov elektromagnetske združljivosti (EMC).

General Information

• Status: Published
• Publication Date: 23-Jul-2013
• Withdrawal Date: 30-Jan-2014
• ICS: 13.110 - Safety of machinery
• Technical Committee: CEN/TC 114 - Safety of machinery
• Drafting Committee: CEN/TC 114 - Safety of machinery
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 24-Jul-2013
• Due Date: 30-Jan-2014
• Completion Date: 24-Jul-2013
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Mandate: M/079 - Mandate to CEN and CENELEC for standardization in the field of machines
• Ref Project: SIST EN ISO 13856-3:2014 - Safety of machinery - Pressure-sensitive protective devices - Part 3: General principles for design and testing of pressure-sensitive bumpers, plates, wires and similar devices (ISO 13856-3:2013)

Relations

• Replaces: EN 1760-3:2004+A1:2009 - Safety of machinery - Pressure sensitive protective devices - Part 3: General principles for the design and testing of pressure sensitive bumpers, plates, wires and similar devices
• Effective Date: 31-Jul-2013

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2014
1DGRPHãþD
SIST EN 1760-3:2004+A1:2009
9DUQRVWVWURMHY9DURYDOQHQDSUDYHREþXWOMLYHQDWODNGHO6SORãQDQDþHOD]D
QDþUWRYDQMHLQSUHVNXãDQMHRGERMQLNRYSORãþåLFLQSRGREQLKQDSUDYREþXWOMLYLK
QDWODN,62
Safety of machinery - Pressure-sensitive protective devices - Part 3: General principles
for design and testing of pressure-sensitive bumpers, plates, wires and similar devices
(ISO 13856-3:2013)
Sicherheit von Maschinen - Druckempfindliche Schutzeinrichtungen - Teil 3: Allgemeine
Leitsätze für die Gestaltung und Prüfung von Schaltpuffern, Schaltflächen, Schaltleinen
und ähnlichen Einrichtungen (ISO 13856-3:2013)
Sécurité des machines - Dispositifs de protection sensibles à la pression - Partie 3:
Principes généraux de conception et d'essai des pare-chocs, plaques, câbles et
dispositifs analogues sensibles à la pression (ISO 13856-3:2013)
Ta slovenski standard je istoveten z: EN ISO 13856-3:2013
ICS:
13.110 Varnost strojev Safety of machinery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 13856-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2013
ICS 13.110 Supersedes EN 1760-3:2004+A1:2009
English Version
Safety of machinery - Pressure-sensitive protective devices -
Part 3: General principles for design and testing of pressure-
sensitive bumpers, plates, wires and similar devices (ISO
13856-3:2013)
Sécurité des machines - Dispositifs de protection sensibles Sicherheit von Maschinen - Druckempfindliche
à la pression - Partie 3: Principes généraux de conception Schutzeinrichtungen - Teil 3: Allgemeine Leitsätze für die
et d'essai des pare-chocs, plaques, câbles et dispositifs Gestaltung und Prüfung von Schaltpuffern, Schaltflächen,
analogues sensibles à la pression (ISO 13856-3:2013) Schaltleinen und ähnlichen Einrichtungen (ISO 13856-
3:2013)
This European Standard was approved by CEN on 5 July 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

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 13856-3:2013: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .4

Foreword
This document (EN ISO 13856-3:2013) 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 January 2014, and conflicting national standards shall be withdrawn at
the latest by January 2014.
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 1760-3:2004+A1:2009.
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 13856-3:2013 has been approved by CEN as EN ISO 13856-3:2013 without any modification.
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 given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of
conformity with the corresponding Essential Requirements of that Directive and associated EFTA regulations.

Table ZA.1 — Correspondence between this European Standard and Directive 2006/42/EC
Clause(s)/sub-clause(s) of this Essential Requirements (ERs)
Qualifying remarks/Notes
Standard of Directive 2006/42/EC
Clause 4 Annex I, 1.2 Control systems
Annex I, 1.3 Protection against mechanical
hazards
Annex I, 1.4 Required characteristics of
(guards and) protection devices
Annex I, 1.5 Risks due to other hazards
Annex I, 1.6 Maintenance
Clauses 5 and 6 Annex I, 1.7 Information

WARNING — Other requirements and other EC Directives may be applicable to the product(s) falling within
the scope of this standard.
INTERNATIONAL ISO
STANDARD 13856-3
Second edition
2013-07-15
Safety of machinery — Pressure-
sensitive protective devices —
Part 3:
General principles for design and
testing of pressure-sensitive bumpers,
plates, wires and similar devices
Sécurité des machines — Dispositifs de protection sensibles à la
pression —
Partie 3: Principes généraux de conception et d’essai des pare-chocs,
plaques, câbles et dispositifs analogues sensibles à la pression
Reference number
ISO 13856-3:2013(E)
©
ISO 2013
ISO 13856-3:2013(E)
© 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 [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 13856-3:2013(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements for design and testing . 8
4.1 General . 8
4.2 Basic requirements . 8
4.3 Specific requirements for pressure-sensitive bumpers .15
4.4 Specific requirements for pressure-sensitive plates .16
4.5 Specific requirements for pressure-sensitive wires (trip wires) .16
5 Marking .17
5.1 General .17
5.2 Labels .17
5.3 Marking of the control unit .17
5.4 Marking of the sensor .17
6 Information for selection and use .17
6.1 General .17
6.2 Essential data for selection of suitable pressure-sensitive protective device .18
6.3 Information for use .19
7 Verification of requirements .21
7.1 Verification of requirements applicable to all pressure-sensitive protective devices
covered by this part of ISO 13856 .21
7.2 Verification of requirements for pressure-sensitive bumpers only .31
7.3 Verification of requirements for pressure-sensitive plates only .32
7.4 Verification of requirements for pressure-sensitive wires only .32
7.5 Other tests .33
Annex A (normative) Timing diagrams for pressure-sensitive bumpers, plates, wires and similar
devices with/without reset .34
Annex B (informative) Device characteristics — Explanatory remarks and recommendations .38
Annex C (informative) Design guidance .40
Annex D (informative) Application guidance .50
Annex E (informative) Commissioning and inspection .54
Bibliography .56
ISO 13856-3:2013(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.
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 13856-3 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 13856-3:2006), which has been
technically revised.
ISO 13856 consists of the following parts, under the general title Safety of machinery — Pressure-sensitive
protective devices:
— Part 1: General principles for design and testing of pressure-sensitive mats and pressure-sensitive floors
— Part 2: General principles for design and testing of pressure-sensitive edges and pressure-sensitive bars
— Part 3: General principles for design and testing of pressure-sensitive bumpers, plates, wires and
similar devices
iv © ISO 2013 – All rights reserved

ISO 13856-3:2013(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.
The safeguarding of machinery (see ISO 12100:2010, 3.21) can be achieved by many different means.
These means include guards which prevent access to the hazard zone by means of a physical barrier
(for example, interlocking guards according to ISO 14119 or fixed guards according to ISO 14120) and
protective devices (for example, electro-sensitive protective equipment according to IEC 61496-1 or
pressure-sensitive protective devices according to this part of ISO 13856).
Type-C standards makers and designers of machinery/installations should consider the best way to
achieve the required level of safety taking into account the intended application and the results of the
risk assessment (see ISO 12100).
The required solution can also be to combine several of these different means. The machinery/installation
supplier and the user examine together carefully the existing hazards and constraints before making
their decision on the choice of safeguarding.
Pressure-sensitive protective devices are used in a wide range of applications with different conditions
of use relating, for example, to extremes of loading or electrical, physical and chemical environments.
They are interfaced with machine controls to ensure that the machine reverts to a safe condition if the
sensitive protective equipment is actuated.
This part of ISO 13856 is restricted to the design of pressure-sensitive protective devices so that they
can be used when the risk assessment carried out by the machine manufacturer and/or relevant type-C
standard, when available, shows this to be appropriate.
This part of ISO 13856 does not specify the dimensions and the configuration of the effective sensing
surface of the pressure-sensitive protective devices in relation to any particular application. However,
there is a requirement for the manufacturer of any safeguard to provide sufficient information to enable the
user (i.e. the machinery manufacturer and/or user of the machinery) to specify an adequate arrangement.
The forces for the activation of the pressure-sensitive protection devices specified in this part of
ISO 13856 are based on the information available at the time of publication. These forces will be kept
under review so that the results of further research into forces that can be applied to the human body
without causing significant injury can be taken into account. While these forces provide a practical
means for the design and testing of the pressure-sensitive device, they cannot prevent injury in all
applications. When specifying the actuating force for a specific device or application many factors
should be taken into account. These include the contact area, the contact speed, the material used and
the part of the body affected.
INTERNATIONAL STANDARD ISO 13856-3:2013(E)
Safety of machinery — Pressure-sensitive protective
devices —
Part 3:
General principles for design and testing of pressure-
sensitive bumpers, plates, wires and similar devices
1 Scope
This part of ISO 13856 establishes general principles and specifies requirements for the design and
testing of those pressure-sensitive protective devices, with or without an external reset facility, that are
not specified in either ISO 13856-1 or ISO 13856-2, and the majority of which are produced for specific
applications and are not available as “off-the-shelf” items.
This part of ISO 13856 also gives specific requirements for the following pressure-sensitive
protective devices:
a) pressure-sensitive bumpers;
b) pressure-sensitive plates;
c) pressure-sensitive wires (trip wires).
It deals with the design of a pressure-sensitive device with regard to safety and reliability rather than
its suitability for particular applications.
NOTE 1 For the relationship between safety and reliability, see ISO 13849-1:2006, 4.2.
NOTE 2 The machinery manufacturer and/or user is responsible for installing appropriate types of protective
device based on a risk assessment.
It is not applicable to
— specifying the dimensions of pressure-sensitive protective devices in relation to any particular
application, or
— stopping devices according to IEC 60204-1 used for the normal operation, including emergency
stopping of machinery.
NOTE 3 Specific requirements for particular applications are intended to be set forth in relevant type-C
standards (see ISO 12100 and Introduction).
Additional requirements can be necessary where pressure-sensitive protective devices are used in
locations accessible to elderly or disabled people or children.
NOTE 4 While requirements are given for the immunity of the device to electromagnetic disturbances, these
are not intended to cover all aspects of electromagnetic compatibility (EMC).
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 4413, Hydraulic fluid power — General rules and safety requirements for systems and their components
ISO 13856-3:2013(E)
ISO 4414, Pneumatic fluid power — General rules and safety requirements for systems and their components
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, Safety of machinery — Safety-related parts of control systems — Part 2: Validation
ISO 13855:2010, Safety of machinery — Positioning of safeguards with respect to the approach speeds of
parts of the human body
IEC 60068-2-6, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal)
IEC 60068-2-14, Environmental testing — Part 2-14: Tests — Test N: Change of temperature
IEC 60068-2-27, Environmental testing — Part 2-27: Tests — Test Ea and guidance: Shock
IEC 60068-2-78, Environmental testing — Part 2-78: Tests — Test Cab: Damp heat, steady state
IEC 60204-1:2005, Safety of machinery — Electrical equipment of machines — Part 1: General requirements
IEC 60529, Degrees of protection provided by enclosures (IP code)
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems — Part 1: Principles,
requirements and tests
IEC 60947-5-1, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and switching
elements — Electromechanical control circuit devices
IEC 60947-5-5:1997, Low-voltage switchgear and controlgear — Part 5-5: Control circuit devices and
switching elements — Electrical emergency stop device with mechanical latching function
IEC 61000-4-2, Electromagnetic compatibility (EMC) — Part 4-2: Testing and measuring techniques —
Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) — Part 4-3: Testing and measurement techniques —
Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) — Part 4-4: Testing and measurement techniques —
Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) — Part 4-5: Testing and measurement techniques —
Surge immunity test
IEC 61000-4-6, Electromagnetic compatibility (EMC) — Part 4-6: Testing and measurement techniques —
Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-6-2, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for
industrial environments
IEC 61439-1:2009, Low-voltage switchgear and controlgear assemblies — Part 1: General rules
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12100 and the following apply.
2 © ISO 2013 – All rights reserved

ISO 13856-3:2013(E)
3.1
pressure-sensitive protective device
sensitive protective equipment of the “mechanically activated trip” type intended to detect the touch of
a person or body part of a person and which can also act as impeding device
Note 1 to entry: A pressure-sensitive protective device consists of a sensor or sensors, which generates a signal
when pressure is applied to part of its outer surface, and a control unit, which responds to the signal from the
sensor and generates an output signal(s) to the control system of a machine.
Note 2 to entry: Pressure-sensitive protective devices can be used as tripping devices as well as presence-sensing
devices, as mentioned in ISO 12100:2010, Note to 3.28.5. For presence-sensing devices, see also 4.2.6.2.
Note 3 to entry: For the definitions of sensitive protective equipment and impeding device, see ISO 12100:2010,
3.28.5 and 3.29, respectively.
3.1.1
pressure-sensitive bumper
pressure-sensitive protective device (3.1) with a sensor (3.3) or sensors whose characteristics are a cross-
section throughout the pressure-sensitive area that can be regular or irregular, a cross-section width
usually greater than 80 mm, and an effective sensing surface (3.10) that is deformed locally or that can
move as a whole
3.1.2
pressure-sensitive plate
pressure-sensitive protective device (3.1) with a sensor (3.3) or sensors whose characteristics are an
effective sensing surface (3.10) that is normally — but not necessarily — flat, an effective sensing surface
width usually greater than 80 mm, and an effective sensing surface that moves as a whole
Note 1 to entry: See Figure C.5.
3.1.3
pressure-sensitive wire
pressure-sensitive protective device (3.1) with a sensor (3.3) or sensors whose characteristics are a wire,
cord, rope or cable held in tension, and where a change in the tension is detected to give an output signal
3.2
presence-sensing device
PSD
sensitive protective equipment that creates a sensing field, area or plane for detecting the presence of a
body part or the whole of a person
Note 1 to entry: Pressure-sensitive protective devices can be used as tripping devices as well as presence-sensing
devices, as mentioned in ISO 12100:2010, Note to 3.28.5.
Note 2 to entry: See also 4.2.6.2.
3.3
sensor
part of the pressure-sensitive protective device (3.1) which generates a signal in response to sufficient
pressure applied to part of its surface
Note 1 to entry: This definition together with that of control unit (3.4) covers the functional components of a
pressure-sensitive protective device. These functions can be integrated into a single assembly or contained in any
number of separate assemblies. See Figure 1.
ISO 13856-3:2013(E)
3.4
control unit
part of the pressure-sensitive protective device (3.1) which responds to the condition of the sensor (3.3)
and generates output signals to the machine control system
Note 1 to entry: This definition together with that of sensor (3.3) covers the functional components of a pressure-
sensitive protective device. These functions can be integrated into a single assembly or contained in any number
of separate assemblies. See Figure 1.
3.5
output signal switching device
part of the control unit (3.4) of a pressure-sensitive protective device (3.1) which is connected to the
machine control system and transmits output signals
3.6
ON state
state in which the output circuit(s) of an output signal switching device (3.5) is complete and permits the
flow of current or fluid
3.7
OFF state
state in which the output circuit(s) of an output signal switching device (3.5) is broken and interrupts the
flow of current or fluid
3.8
actuating force
any force applied to the sensor (3.3) which causes the output signal switching device (3.5) to go to the
OFF state (3.7)
3.9
approach speed
relative speed at which contact is made between the surface of the sensor (3.3) and a part of the body
3.10
effective sensing surface
part of the surface of the sensor (3.3) or a combination of sensors, as stated by the manufacturer, where the
application of an actuating force (3.8) creates an OFF state (3.7) in the output signal switching device (3.5)
3.11
effective sensing direction(s)
direction(s) of the actuating force (3.8) from which the sensor (3.3) will be actuated
3.12
dead surface
part of the surface area of the sensor (3.3) outside the effective sensing surface (3.10)
3.13
actuating travel
distance travelled by a specified object, moving in the direction of the applied actuating force (3.8), and
measured from the point at which this object touches the effective sensing surface (3.10) to the point at
which the output signal switching device (3.5) changes to an OFF state (3.7) under specified conditions
Note 1 to entry: See Figure 2.
Note 2 to entry: Actuating travel can differ from pre-travel, a term relating to a pressure-sensitive edge or pressure-
sensitive bar (see ISO 13856-2) and signifying travel in the direction normal to the reference axis; actuating travel
is in the direction of the applied force.
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ISO 13856-3:2013(E)
3.14
working travel
distance travelled by a specified object, moving in the direction of the applied actuating force (3.8), and
measured from the point at which this object touches the effective sensing surface (3.10), under specified
conditions, to where a specified force is exerted on the object
Note 1 to entry: See Figure 2 and Annex B.
3.15
overtravel
difference between the working travel (3.14) and the actuating travel (3.13) when both these distances
are measured with the same object applied under the same conditions
Note 1 to entry: See Figure 2.
3.16
force-travel relationship
relationship between the force applied and the distance travelled by a pressure-sensitive protective device
(3.1) in operation
Note 1 to entry: See Figure 2.
3.17
reset
function which permits an ON state (3.6) in the output signal switching device (3.5), provided that certain
conditions are met
3.18
mounting orientation
orientation in space of the sensor (3.3)
3.19
total travel
movement or deformation of the effective sensing surface (3.10) of a pressure-sensitive protective device
(3.1), measured in the direction of the actuating force (3.8) from the point of contact to the point at
which no further significant deformation of the effective sensing surface occurs
ISO 13856-3:2013(E)
Key
1 pressure-sensitive protective device
2 sensor(s)
3 control unit*
4 output signal switching device
5 part of the machine control system for pressure-sensitive protective device output signal processing
6 actuating force
7 sensor output
8 ON state/OFF state signal
9 manual reset signal**
10 reset signal from machine control system (where appropriate)
11 monitoring signals (optional)
a manual reset signal to the machine control system***
b machine control system(s)
* Can be located within the machine control system or as part of the machine control system, e.g. as a logic
block.
** Where appropriate, this may be used as an alternative to a.
*** Where appropriate, this may be used as an alternative to 9.
Figure 1 — Systematic sketch of pressure-sensitive protective device as applied to machine
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ISO 13856-3:2013(E)
Key
A actuating point and actuating force at maximum operating speed
B force-travel points occurring at force of 250 N (B1) or 400 N (B2) at operating speed of ≤ 10 mm ⋅ s−1
C force-travel point occurring, for example, at a force of 600 N at an operating speed of ≤ 10 mm ⋅ s−1
1 reference force
2 lowest actuating force
a force, N
b travel, mm
c actuating travel
d overtravel at 250 N
e working travel at 250 N
f overtravel at 400 N
g working travel at 400 N
h total travel
Figure 2 — Diagram of force-travel relationship — Example
ISO 13856-3:2013(E)
4 Requirements for design and testing
4.1 General
The majority of pressure-sensitive protective devices covered by this part of ISO 13856 are made for
specific applications. Where appropriate, the device manufacturer and the machine builder shall agree
on the application specific requirements in accordance with a risk assessment and specify the essential
force-travel data for the application.
The pressure-sensitive protective device shall have dimensions and be positioned such that the sensor
will detect by touch the approach of a person or part of a person to a hazardous situation or a hazard zone.
In general, there are two types of application, as follows.
a) The device is used to stop the hazardous parts of machinery that are remote from the sensor. In this
application, the distance between the sensor and the moving parts of the machine shall be such that
the machine stops before any part of the body can reach the hazardous zone. The distance shall be
calculated on the basis of the principles presented in ISO 13855. See the example given in C.4.2.
b) The sensor is mounted on the hazardous part of the machine or adjacent to it, so that the machine
will stop or reverse to a safe position after the sensor is actuated and before injury can occur. See
the example given in C.3.10.
The following basic requirements apply to all the pressure-sensitive protective devices covered by this
part of ISO 13856. Additional specific requirements are given for pressure-sensitive bumpers, pressure-
sensitive plates and pressure-sensitive wires. These specific requirements according to 4.3 to 4.5 take
precedence over the basic requirements given in 4.2.
4.2 Basic requirements
4.2.1 Actuating force
For the test method, see 7.1.1 and 7.1.5.
The lowest actuating force(s) necessary to cause the output signal switching device to go to an OFF state
shall not exceed those specified in Table 2, when applied
— in the reference direction(s),
— over the effective sensing surface,
— at the relevant approach speed(s),
— with the sensor in the mounting orientations,
— with the relevant test piece, and
— over the temperature range,
which the manufacturer of the pressure-sensitive protective device has specified or which have been
agreed by the manufacturer of the pressure-sensitive protective device and the machine builder(s).
The lowest actuating force could need to be less than that stated in Table 2 for specific applications
and designs of sensor. See 4.5.3 for the lowest actuating force necessary to cause the control unit for
pressure-sensitive wires to go to the OFF state.
NOTE 1 A suitable risk assessment will show which body part(s) are to be considered for a particular
application, enabling the relevant test piece(s) to be used.
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ISO 13856-3:2013(E)
NOTE 2 The forces specified in this clause are primarily intended for the purpose of assessing the pressure-
sensitive performance of the device. These forces ought not to be considered as safe forces for all applications (see
Introduction and Annex C for guidance).
NOTE 3 Certain applications — for example, protecting the neck — can require a device with a higher
sensitivity, i.e. actuating forces lower than those shown in Table 2.
4.2.2 Actuating travel
For the test method, see 7.1.1 and 7.1.6.
The actuating travel shall be not more than that stated by the manufacturer of the pressure-sensitive
protective device. For devices manufactured for a specific application, the actuating travel shall be
appropriate for the application (see Annex B for advice on the force-travel relationship of specific devices).
4.2.3 Overtravel
For the test method, see 7.1.1 and 7.1.7.
The overtravel shall be not less than that stated by the manufacturer of the pressure-sensitive protective
device. For devices manufactured for a specific application, the overtravel shall be appropriate for the
application (see Annex B for advice on the force -travel relationship of specific devices).
4.2.4 Approach speed
For the test methods, see 7.1.1, 7.1.5, 7.1.6 and 7.1.7.
The sensor shall be able to cause an OFF state in the output signal switching device when actuated with
the foreseeable approach speed(s) as stated by the manufacturer of the pressure-sensitive protective
device. For devices manufactured for a specific application, the approach speed shall be appropriate for
the application.
4.2.5 Number of operations
For the test method, see 7.1.1 and 7.1.8.
The pressure-sensitive protective device shall continue in normal operation and the sensor shall have no
visible signs of damage after the number of operations stated by the manufacturer of the device. For devices
manufactured for a specific application, the number of operations shall be appropriate for that application.
4.2.6 Response of output signal switching device to actuating force
4.2.6.1 Systems where sensor output remains in changed state as long as actuating force is applied
For the test method, see 7.1.1 and 7.1.9.
When the actuating force has been applied to the sensing surface of the sensor, the sensor output shall
change state, causing the output signal switching device to change from an ON state to an OFF state. The
change in state of the sensor output is a direct function of the applied force and this new state of the
sensor output shall remain for as long as the actuating force is applied.
The output signal switching device shall only revert to the ON state when
— for systems with reset, the actuating force is removed and a reset signal is applied (see Figures A.1
and A.2), or
— for systems without reset, the actuating force is removed (see Figure A.3).
ISO 13856-3:2013(E)
4.2.6.2 Systems where sensor output does not remain in changed state while actuating force
is maintained
For the test method, see 7.1.1 and 7.1.9.
The sensor shall give a signal when the actuating force has been applied to its sensing surface, causing
the output signal switching device to change from an ON to an OFF state. The output signal switching
device shall only revert to the ON state when a reset signal is applied or when additional protective
measures are taken to ensure that there is no hazard, e.g. automatic reversal of hazardous movement.
Such additional protective measures shall be stated in information for use, see 6.3.1 a).
For some devices, additional protective measures are required. See Figure A.4, C.3.6 and C.3.7.
Some devices, e.g. air-pulse sensors, which are not regarded as well-tried components, shall comply with
the requirements of category 2 according to ISO 13849-1:2006.
4.2.6.3 Reset function
For the test method, see 7.1.1 and 7.1.10.
The reset function of a pressure-sensitive protective device shall fulfil the general requirements of
ISO 13849-1:2006, 6.2.2, and the functional requirements of Annex A of this part of ISO 13856.
To reset a start interlock or a restart interlock of a pressure-sensitive protective device, the reset signal
shall be applied either
— directly to the control unit of the pressure-sensitive protective device, or
— via the machine control system.
When manual reset is provided, it shall function according to Figures A.1 and A.2 and ISO 13849-1:2006, 5.2.
4.2.7 Environmental conditions
4.2.7.1 Requirements for normal operation
For the test method, see 7.1.1 and 7.1.11.
The pressure-sensitive protective device shall continue in normal operation in the environmental
conditions stated by the manufacturer in accordance with the requirements given in 4.2.7. Under these
conditions, normal operation is achieved when
— the output signal switching device remains in the ON state as long as no actuating force is applied, and
— the ON state changes to an OFF state when the actuating force is applied.
4.2.7.2 Temperature
For the test method, see 7.1.1 and 7.1.11.3.
The system shall continue in normal operation over a minimum temperature range of 5 °C to 40 °C. If the
manufacturer states that the pressure-sensitive protective device is suitable for a wider temperature
range, then it shall continue in normal operation over the stated temperature range.
4.2.7.3 Humidity
For the test method, see 7.1.1 and 7.1.11.4.
All equipment shall meet the requirements for humidity specified by the manufacturer.
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ISO 13856-3:2013(E)
For electrical equipment only, the system shall continue in normal operation and the integrity of the
electrical insulation shall be maintained following storage at a relative humidity of 93 % and at a
temperature of 40 °C, for four days.
4.2.7.4 Electromagnetic compatibility
For the test method, see 7.1.1 and 7.1.11.5.
Where the pressure-sensitive protective device can be affected by electromagnetic emissions, it
shall continue in normal operation under the conditions given in IEC 61000-6-2 and in Table 5. The
manufacturer may design to, and subsequently state, a higher level(s) for which the pressure-sensitive
protective device is required to continue in normal operation. A higher level of protection shall be
provided when this is required to maintain safe operation of the pressure-sensitive protective device in
a specific application.
4.2.7.5 Vibration
For the test method, see 7.1.1 and 7.1.11.6.
The pressure-sensitive protective device shall continue to operate without being actuated under the
following vibration conditions in accordance with IEC 60068-2-6:
— frequency range: 10 Hz to 55 Hz;
— displacement: 0,15 mm;
— 10 cycles per axis;
— sweep rat
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