CLC/TS 62046:2008

SLOVENSKI STANDARD
01-januar-2009
1DGRPHãþD
SIST-TS CLC/TS 62046:2007
9DUQRVWVWURMHY8SRUDED]DãþLWQHRSUHPH]DRGNULYDQMHSULVRWQRVWLRVHE,(&76

Safety of machinery - Application of protective equipment to detect the presence of
persons
Sicherheit von Maschinen - Anwendung von Schutzausrüstungen zur
Anwesenheitserkennung von Personen
Sécurité des machines - Application des équipements de protection à la détection de la
présence de personnes
Ta slovenski standard je istoveten z: CLC/TS 62046:2008
ICS:
13.110 Varnost strojev Safety of machinery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CLC/TS 62046
SPÉCIFICATION TECHNIQUE
May 2008
TECHNISCHE SPEZIFIKATION
ICS 13.110 Supersedes CLC/TS 62046:2005

English version
Safety of machinery -
Application of protective equipment
to detect the presence of persons
(IEC/TS 62046:2008)
Sécurité des machines -  Sicherheit von Maschinen -
Application des équipements de protection Anwendung von Schutzausrüstungen zur
à la détection de la présence Anwesenheitserkennung von Personen
de personnes (IEC/TS 62046:2008)
(CEI/TS 62046:2008)
This Technical Specification was approved by CENELEC on 2008-05-01.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to
make the TS available promptly at national level in an appropriate form. It is permissible to keep conflicting
national standards in force.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. CLC/TS 62046:2008 E
Foreword
The text of document 44/534/CDV, future edition 2 of IEC/TS 62046, prepared by IEC TC 44, Safety of
machinery - Electrotechnical aspects, was submitted to the IEC-CENELEC Parallel Unique Acceptance
Procedure and was approved by CENELEC as CLC/TS 62046 on 2008-05-01.
This Technical Specification supersedes CLC/TS 62046:2005.
The following date was fixed:
– latest date by which the existence of the CLC/TS
has to be announced at national level (doa) 2008-08-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the Technical Specification IEC/TS 62046:2008 was approved by CENELEC as a Technical
Specification without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
ISO 13857 NOTE  Harmonized as EN ISO 13857:2008 (not modified).
__________
- 3 - CLC/TS 62046:2008
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1) 2)
IEC 60204-1 - Safety of machinery - Electrical equipment EN 60204-1 2006
(mod) of machines -
Part 1: General requirements
IEC 61496-1 2004 Safety of machinery - Electro-sensitive EN 61496-1 2004
(mod) protective equipment -
Part 1: General requirements and tests

3)
IEC 61496-2 1997 Safety of machinery - Electro-sensitive CLC/TS 61496-2 2003
protective equipment -
Part 2: Particular requirements for equipment
using active opto-electronic protective devices
(AOPD)
4)
IEC 61496-3 2001 Safety of machinery - Electro-sensitive CLC/TS 61496-3 2003
protective equipment -
Part 3: Particular requirements for Active
Opto-electronic Protective Devices responsive
to Diffuse Reflection (AOPDDR)

1) 2)
IEC 62061 - Safety of machinery - Functional safety of EN 62061 2005
safety-related electrical, electronic and
programmable electronic control systems

ISO 12100-1 2003 Safety of machinery - Basic concepts, EN ISO 12100-1 2003
general principles for design -
Part 1: Basic terminology, methodology

ISO 12100-2 2003 Safety of machinery - Basic concepts, EN ISO 12100-2 2003
general principles for design -
Part 2: Technical principles
ISO 13849 Series Safety of machinery - Safety-related parts of EN ISO 13849 Series
control systems
ISO 13855 2002 Safety of machinery - Positioning of - -
protective equipment with respect to the
approach speeds of parts of the human body

ISO 13856-1 2001 Safety of machinery - Pressure-sensitive - -
protective devices - Part 1: General principles
for design and testing of pressure-sensitive
mats and pressure-sensitive floors

ISO 14121 Series Safety of machinery - Risk assessment EN ISO 14121 Series

1)
Undated reference.
2)
Valid edition at date of issue.
3)
CLC/TS 61496-2 is superseded by CLC/TS 61496-2:2006, which is based on IEC 61496-2:2006.
4)
CLC/TS 61496-3 is superseded by CLC/TS 61496-3:2008, which is based on IEC 61496-3:2008.

IEC/TS 62046
Edition 2.0 2008-02
TECHNICAL
SPECIFICATION
SPÉCIFICATION
TECHNIQUE
Safety of machinery – Application of protective equipment to detect the
presence of persons
Sécurité des machines – Application des équipements de protection à la
détection de la présence de personnes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XE
CODE PRIX
ICS 13.110 ISBN 2-8318-9613-4
– 2 – TS 62046 © IEC:2008
CONTENTS
FOREWORD.6
INTRODUCTION.8

1 Scope.10
2 Normative references .10
3 Terms, definitions and abbreviations .11
3.1 Terms and definitions .11
3.2 Abbreviations .18
4 Selection of protective measures.18
4.1 Procedure (relationship with ISO 12100 (all parts)).18
4.2 Machine characteristics .19
4.2.1 Suitability of protective equipment .19
4.2.2 Suitability of protective equipment as a trip device .20
4.3 Environmental characteristics.20
4.4 Uses of protective equipment .21
4.4.1 General .21
4.4.2 Trip device .22
4.4.3 Presence sensing device .24
4.4.4 Combination trip and presence sensing device .24
4.5 Human characteristics .24
4.5.1 General .24
4.5.2 Approach speed (K).25
4.5.3 Penetration/encroachment factor (C) .25
4.5.4 Ability to circumvent protective equipment .25
4.6 Protective equipment characteristics .26
4.6.1 ESPEs.26
4.6.2 Pressure sensitive mats and floors .28
4.7 Machine control system functions associated with the application of
protective equipment .28
4.7.1 General .28
4.7.2 Stopping performance monitoring (SPM) .28
4.7.3 Muting .28
4.7.4 Reinitiation of cyclic operation by the protective equipment .29
4.7.5 Start interlock .29
4.7.6 Restart interlock .29
4.7.7 Blanking .29
4.7.8 External Device Monitoring (EDM) .29
4.7.9 Provision of machine control functions.30
5 General application requirements .30
5.1 Positioning and configuration of the protective equipment detection zone.30
5.2 Integration with the safety-related control system .30
5.3 Performance of protective equipment .30
5.3.1 General .30
5.3.2 Classification of protective equipment.31
5.4 Stopping performance monitoring .32
5.5 Muting .33

TS 62046 © IEC:2008 – 3 –
5.5.1 General .33
5.5.2 Muting to allow access by persons .34
5.5.3 Muting to allow access by materials.34
5.5.4 Mute dependent override .34
5.6 Reinitiation of cyclic operation by the protective equipment .35
5.6.1 General .35
5.6.2 Particular requirements for press applications .36
5.7 Start interlock.37
5.8 Restart interlock .37
5.9 Blanking .37
6 Particular application requirements for specific protective equipment .37
6.1 AOPDs .37
6.1.1 General .37
6.1.2 Light beam device(s) .38
6.1.3 Light curtains.39
6.2 AOPDDRs .40
6.3 PIPDs.41
6.3.1 General .41
6.3.2 Mobile applications.42
6.4 Pressure-sensitive mats and floors.42
6.4.1 Pressure sensitive floors .42
6.4.2 Pressure sensitive mats.42
7 Inspection and test .44
7.1 General .44
7.2 Initial inspection and test.44
7.3 Periodic inspection and test.45
7.4 Functional checks .45
8 Information for safe use.47

Annex A (informative) Examples of interfacing ESPEs to a machine .48
Annex B (informative) Summary of minimum type test requirements for various
protective equipment .55
Annex C (informative) Application examples .59
Annex D (informative) Protective devices for the detection of the position of a person .65
Annex E (informative) Additional recommendations for the application of AOPDDRs .68
Annex F (informative) Additional recommendations for the configuration of
photoelectric muting sensors when used to allow access by materials .75
Annex G (informative) Periodic test intervals for Type 2 ESPE.99

Bibliography.102

Figure 1 – Relationship of this Technical Specification to other standards .9
Figure 2 – Risk reduction process (simplified version of Figure 2 of ISO 12100-1) .19
Figure 3 – Detection principle of through-beam AOPD .26
Figure 4 – Through-beam AOPD using mirrors.26
Figure 5 – Retro-reflective AOPD.27

– 4 – TS 62046 © IEC:2008
Figure 6 – Detection principle of AOPDDR.27
Figure 7 – Example of the effect of reflective surfaces .38
Figure 8 – Example of use of blanking .40
Figure A.1 – Integration with the control system.48
Figure A.2 – Example of integration – Category 4 .49
Figure A.3 – Example of integration – Category 4 .50
Figure A.4 – Example of an incorrect integration – Category 4.50
Figure A.5 – Example of an incorrect integration – Category 4.51
Figure A.6 – Example of integration of an ESPE: Category 4 .51
Figure A.7 – Example of integration – Category 3 .52
Figure A.8 – Example of an incorrect integration – Category 3.53
Figure A.9 – Integration with a safety-related control system .54
Figure C.1 – Protective equipment used as a trip device.59
Figure C.2 – Protective equipment used as combined trip and presence sensing device.59
Figure C.3 – Protective equipment used as a combined trip and presence sensing
device.60
Figure C.4 – Horizontal AOPD .61
Figure C.5 – Vertical AOPD .62
Figure C.6 – Increased separation distance .63
Figure C.7 – Additional mechanical protection .63
Figure C.8 – Use of a trip device.64
Figure E.1 – Example of the use of an AOPDDR on machinery .69
Figure E.2 – Example of the use of an AOPDDR on machinery .69
Figure E.3 – Example of the use of an AOPDDR on an AGV .70
Figure E.4 – Use of an AOPDDR as a whole-body trip device – Example 1.71
Figure E.5 – Use of an AOPDDR as a whole-body trip device – Example 2.72
Figure E.6 – Use of an AOPDDR as parts of a body trip device – Example 1 .73
Figure E.7 – Use of an AOPDDR as parts of a body trip device – Example 2 .73
Figure F.1 – T configuration with timing control.75
Figure F.2 – L configuration with timing control .76
Figure F.3 – Parallel beams with timing or sequence control.76
Figure F.4 – Four parallel beams with timing control .77
Figure F.5 – Positioning of the muting sensors to avoid muting by a person's body
(plan view).78
Figure F.6 – Positioning of the muting sensors (side view).78
Figure F.7 – Timing diagram; four parallel beams with timing control .79
Figure F.8 – Four beams: Timing control and crossed beams (not recommended) .79
Figure F.9 - Timing diagram; four beams; sequence control .80
Figure F.10 – Four beams with additional swinging doors .81
Figure F.11 – Timing diagram for mute enable signal (mute enable activated) .81
Figure F.12 – Timing diagram for mute enable signal (mute enable not activated) .82
Figure F.13 – Avoidance of manipulation of the muting function (plan view).82
Figure F.14 – Avoidance of manipulation of the muting function (front view) .83

TS 62046 © IEC:2008 – 5 –
Figure F.15 – Connection of the muting sensors .83
Figure F.16 – Two sensors – Crossed beams .84
Figure F.17 – Two sensors – Crossed beams (risk of entering the hazardous zone
without detection when x >200 mm) .85
Figure F.18 – Positioning of the muting sensors.86
Figure F.19 – Detection of the test object .86
Figure F.20 – Timing diagram for two crossed beams (normal operation).87
Figure F.21 – Timing diagram for two crossed beams (timeout) .87
Figure F.22 – Single swinging doors in combination with a two-beam muting system
(correct position).88
Figure F.23 Single swinging doors (incorrect position) .89
Figure F.24 – Single swinging doors (incorrect position) .90
Figure F.25 – Height of crossing point .91
Figure F.26 – Interruption of the beam .92
Figure F.27 – Two muting sensor beams – exit only.93
Figure F.28 – Timing diagram; two muting sensor beams – exit only, muting terminated
by the ESPE .93
Figure F.29 – Timing diagram; two muting sensor beams – exit only, muting terminated
by the 4 s timer.94
Figure F.30 – Timing diagram, muting terminated by the muting timeout .94
Figure F.31 – Production line incorporating two machines.95
Figure F.32 – Production line incorporating two machines.96
Figure F.33 – Example of an external override in a category 4 control system .96
Figure F.34 – Example of an external override in a category 3 control system .97
Figure F.35 – Example of an external override at a work area with two access points
and two separate muting functions – Category 4.98
Figure G.1 – Failure occurrence after approach .100
Figure G.2 – Approach after a failure .100
Figure G.3 – Average time of approach.100

Table 1 – Beam heights for light beam devices .39
Table B.1 – List of environmental considerations to assist the selection of a protective
equipment.56
Table F.1 – Truth table, four beams; sequence control.80

– 6 – TS 62046 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF MACHINERY –
APPLICATION OF PROTECTIVE EQUIPMENT
TO DETECT THE PRESENCE OF PERSONS

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• The subject is still under technical development or where, for any other reason, there is
the future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 62046, which is a technical specification, has been prepared by IEC technical committee
44: Safety of machinery – Electrotechnical aspects.
This second edition cancels and replaces the first edition issued in 2004. This second edition
constitutes a general technical revision of the first edition, and includes further examples of
interfacing and muting techniques.

TS 62046 © IEC:2008 – 7 –
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
44/534/DTS 44/552B/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 8 – TS 62046 © IEC:2008
INTRODUCTION
This Technical Specification provides information on the application of protective equipment,
which employs a sensing device(s) to detect person(s) in or approaching an area, in order to
reduce or minimize a risk from hazardous parts of machinery, without providing a physical
barrier.
The objective of this specification is to assist: standards writing committees responsible for
developing machine standards ("C" Standards), machine designers, manufacturers and
refurbishers, machine safety certification organizations, workplace authorities and others on
the proper application of protective equipment to machinery.
Figures 1 and 2 show the general context and the intended use of this specification.
Clauses 1 to 5, 7 and 8 of this specification apply to all protective equipment included in the
scope, Clause 6 contains guidance for the application of specific kinds of protective
equipment.
TS 62046 © IEC:2008 – 9 –
From
ISO 12100-1
(see Figure 2)
No
Preliminary decision to use Use other protective
protective equipment? measures (See
IEC 62046 informative Annex D)
Yes
General requirements for the safety
Environmental conditions
functions to be provided
Conditions for use
For trip function or presence sensing
Functional requirements
function see ISO 12100, ISO 13855;
Human and machine properties
For prevention of unexpected
start-up see ISO 14118
Integration into
Protective equipment Preliminary selection of a
safety-related control system
manufacturer’s specific kind of protective
ISO 13849         IEC 62061
information for use equipment
(all parts)
IEC 62046
DETAILED DESIGN AND FINAL
Dimensioning and
SELECTION
positioning
Specific machine
Subclause 4.4.2.2.1
(C-type) standards
IEC 62046
(ISO 13855)
giving specific
requirements for the
application of
sensitive protective
equipment
Verification,
validation and
commissioning
IEC 62046
To ISO 12100-1
(see Figure 2)
Figure 1 – Relationship of this Technical Specification to other standards
(see also Figure 2)
– 10 – TS 62046 © IEC:2008
SAFETY OF MACHINERY –
APPLICATION OF PROTECTIVE EQUIPMENT
TO DETECT THE PRESENCE OF PERSONS

1 Scope
This Technical Specification specifies requirements for the selection, positioning,
configuration and commissioning of protective equipment to detect the presence of persons in
order to protect those persons from dangerous part(s) of machinery in industrial applications.
This standard covers the application of electro-sensitive protective equipment (ESPE)
specified in IEC 61496 (all parts) and pressure sensitive mats and floors specified in
ISO 13856-1.
It takes into account the characteristics of the machinery, the protective equipment, the
environment and human interaction by persons of 14 years and older.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60204-1, Safety of machinery – Electrical equipment of machines – Part 1: General
requirements
IEC 61496-1:2004, Safety of Machinery – Electro-sensitive protective equipment – General
requirements and tests
IEC 61496-2:1997, Safety of machinery – Electro-sensitive protective equipment – Part 2:
Particular requirements for equipment using active opto-electronic protective devices
(AOPDs)
IEC 61496-3:2001, Safety of machinery – Electro-sensitive protective equipment – Particular
requirements for equipment for Active Opto-Electronic Protective Devices responsive to
Diffuse Reflection (AOPDDR)
IEC 62061, Safety of machinery – Functional safety of safety related electrical, electronic and
programmable control systems
ISO 12100-1: 2003, Safety of machinery – Basic concepts, general principles for design –
Part 1: Basic terminology, methodology
ISO 12100-2: 2003, Safety of machinery – Basic concepts, general principles for design –
Part 2: Technical principles
ISO 13849 (all parts), Safety of Machinery – Safety-related parts of control systems
ISO 13855:2002, Safety of machinery – Positioning of protective equipment with respect to
the approach speeds of parts of the human body
ISO 13856-1:2001, Safety of machinery – Pressure-sensitive protective devices – Part 1:
General principles for design and testing of pressure-sensitive mats and pressure-sensitive
floors
ISO 14121 (all parts), Safety of machinery – Risk assessment

TS 62046 © IEC:2008 – 11 –
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
active opto-electronic protective device
AOPD
device whose sensing function is performed by opto-electronic emitting and receiving
elements detecting the interruption of optical radiations generated, within the device, by an
opaque object present in the specified detection zone (or for a light beam device, on the axis
of the light beam)
[IEC 61496-2, 3.201, modified]
3.1.2
active opto-electronic protective device responsive to diffuse reflection
AOPDDR
device, whose sensing function is performed by opto-electronic emitting and receiving
elements, that detects the diffuse reflection of optical radiations generated within the device
by an object present in a detection zone specified in two dimensions
[IEC 61496-3, 3.301]
3.1.3
blanking
optional function that permits an object of a size greater than the detection capability of the
ESPE to be located within the detection zone without causing an OFF-state of the OSSD(s)
[IEC 61496-1, 3.1]
3.1.4
detection capability
sensing function parameter limit specified by the supplier that will cause actuation of the
protective equipment
[IEC 61496-1, 3.3, modified]
3.1.5
detection zone
zone within which a specified test piece will be detected by the electro-sensitive protective
equipment (ESPE)
[IEC 61496-1, 3.4]
NOTE ISO 13856-1 uses the term “effective sensing area” when describing pressure-sensitive mats and floors. In
this document the terms “detection zone” and “effective sensing area” are used synonymously.
3.1.6
electro-sensitive protective equipment
ESPE
assembly of devices and/or components working together for protective tripping or presence-
sensing purposes and comprising as a minimum
– a sensing device;
– controlling/monitoring devices;
– output signal switching devices
[IEC 61496-1, 3.5]
– 12 – TS 62046 © IEC:2008
3.1.7
effective sensing area
part of the top surface area of the sensor or a combination of the pressure-sensitive mat or
pressure-sensitive floor within which a response to an actuating force will take place
NOTE IEC 61496-1 uses the term “detection zone” when describing electro-sensitive protective equipment. In this
document the terms “detection zone” and “effective sensing area” are used synonymously.
[ISO 13856-1, modified]
3.1.8
external device monitoring
EDM
means by which the electro-sensitive protective equipment (ESPE) monitors the state of
control devices which are external to the ESPE
[IEC 61496-1, 3.6]
3.1.9
failure (of equipment)
termination of the ability of an item to perform a required function
NOTE 1 After failure the item has a fault.
NOTE 2 "Failure" is an event, as distinguished from "fault", which is a state.
NOTE 3 This concept as defined does not apply to items consisting of software only.
[IEV-191-04-01]
3.1.10
failure to danger
failure which prevents or delays all output signal switching devices going to, and/or remaining
in the OFF-state in response to a condition which, in normal operation, would result in their so
doing
[IEC 61496-1, 3.8]
3.1.11
fault
state of an item characterized by its inability to perform a required function, excluding the
inability during preventive maintenance or other planned actions, or due to lack of external
resources
[IEV 191-05-01]
NOTE 1 A fault is often the result of a failure of the item itself, but may exist without prior failure.
NOTE 2 In the field of machinery, the English term `fault’ is commonly used in accordance with the definition in
IEV 191-05-01, whereas the French term “défaut” and the German term “fehler” are used rather than the term
“panne” and “fehlzustand” that appear with this definition.
NOTE 3 In practice, the terms “fault” and “failure” (see 3.1.9) are often used synonymously.
3.1.12
Final Switching Device
FSD
component of the machine’s safety-related control system that interrupts the circuit to the
machine primary control element (MPCE) when the output signal switching device (OSSD)
goes to the OFF-state
[IEC 61496-1, 3.10]
TS 62046 © IEC:2008 – 13 –
3.1.13
hazard
potential source of harm
[ISO 12100-1, 3.6]
NOTE The word "hazard" is generally used in conjunction with other words defining its origin or the nature of the
expected injury or damage to health: electrical shock hazard, crushing hazard, shearing hazard, toxic hazard, etc.
3.1.14
hazardous situation
circumstance in which a person is exposed to at least one hazard. The exposure can
immediately or over a period of time result in harm
[ISO 12100-1, 3.9]
3.1.15
hazard zone (danger zone)
any space within and/or around machinery in which a person can be exposed to a hazard
[ISO 12100-1, 3.10]
NOTE The hazard generating the risk envisaged in this definition:
– either is permanently present during the intended use of the machine (motion of hazardous moving elements,
electric arc during a welding phase);
– or can appear unexpectedly (unintended/unexpected start-up).
3.1.16
integrator
individual or group of individuals responsible for selecting, configuring, installing and/or
interfacing the protective equipment to achieve the safeguarding identified by the risk
assessment
3.1.17
light beam device
either a single light beam device or a multiple light beam device
– single light beam device: active opto-electronic protective device (AOPD) comprising
one emitting element and one receiving element, where a detection zone is not
specified by the supplier
– multiple light beam device: active opto-electronic protective device (AOPD)
comprising multiple emitting elements and corresponding receiving elements, and
where a detection zone is not specified by the supplier
[IEC 61496-2, 3.205, modified]
3.1.18
light curtain
active opto-electronic protective device (AOPD) comprising an integrated assembly of one or
more emitting element(s) and one or more receiving element(s) forming a detection zone with
a detection capability specified by the supplier
NOTE A light curtain with a large detection capability is sometimes referred to as a light grid.
[IEC 61496-2, 3.206, modified]
3.1.19
lock-out condition
condition, initiated by a fault, preventing normal operation of the protective equipment which
is automatically attained when all output signal switching devices (OSSDs) and, where

– 14 – TS 62046 © IEC:2008
applicable, all final switching devices (FSDs) and secondary switching devices (SSD) are
signalled to go to the OFF-state
[IEC 61496-1, 3.13, modified]
3.1.20
machine primary control element
MPCE
electrically powered element that directly controls the normal operation of a machine in such a
way that it is the last element (in time) to function when machine operation is to be initiated or
arrested
[IEC 61496-1, 3.14]
3.1.21
machine secondary control element
MSCE
machine control element, independent of the machine primary control element(s), that is
capable of removing the source of power from the prime mover of the relevant hazardous
parts
[IEC 61496-1, 3.15]
3.1.22
mute dependent override function
function that allows manual operation of the machine when the detection zone of the ESPE is
interrupted to allow the evacuation of the pallet or of the material from the muting area
NOTE This function can be necessary in case of a fault in the muting sequence(s) or when a blockage occurs in
the transport system or when a pallet is already present in front of the muting sensors at “power on”.
3.1.23
muting
temporary automatic suspension of a safety function(s) by safety-related parts of the control
system
[IEC 61496-1, 3.16]
NOTE When muting is provided as part of the protective equipment and the protective equipment is muted, the
OSSD(s) remain in the `ON’ state upon activation of the protective equipment sensing function and safety is
maintained by other means.
3.1.24
muting area
area between the detection zones of the first and last muting sensors, including the detection
zone of the ESPE
3.1.25
muting sensor
device used to initiate and/or terminate muting
3.1.26
OFF-state
state in which the output circuit is interrupted and does not permit the flow of current
[IEC 61496-1, 3.17]
3.1.27
ON-state
state in which the output circuit is complete
...