IEC TR 61496-4:2007

Safety of machinery - Electro-sensitive protective equipment - Part 4: Particular requirements for equipment using vision based protective devices (VBPD)

provides information related to the design, construction and testing of electro-sensitive protective equipment (ESPE) that employs vision-based protective devices (VBPDs) for the sensing function for the safeguarding of machinery.

Sécurité des machines - Equipements de protection électro-sensibles - Partie 4: Exigences particulières pour les équipements utilisant des dispositifs protecteurs par vision (VBPD)

fournit des informations relatives à la conception, la fabrication et les essais des équipements de protection électro-sensibles (ESPE) qui emploient des dispositifs protecteurs par vision (VBPD) pour la fonction détection de la protection de la machine.

General Information

• Status: Withdrawn
• Publication Date: 09-Jul-2007
• Withdrawal Date: 29-Sep-2016
• ICS: 13.110 - Safety of machinery
• ICS: 29.260.99 - Other electrical equipment for working in special conditions
• Technical Committee: TC 44 - Safety of machinery - Electrotechnical aspects
• Current Stage: WPUB - Publication withdrawn
• Completion Date: 06-Nov-2015

Standards Content (Sample)

TECHNICAL IEC
REPORT
CEI
TR 61496-4
RAPPORT
First edition
TECHNIQUE
Première édition
2007-07
Safety of machinery –
Electro-sensitive protective equipment –
Part 4:
Particular requirements for equipment using
vision based protective devices (VBPD)

Sécurité des machines –
Equipements de protection électro-sensibles –
Partie 4:
Exigences particulières pour les équipements
utilisant des dispositifs protecteurs par
vision (VBPD)
Reference number
Numéro de référence
IEC/CEI/TR 61496-4:2007
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TECHNICAL IEC
REPORT
CEI
TR 61496-4
RAPPORT
First edition
TECHNIQUE
Première édition
2007-07
Safety of machinery –
Electro-sensitive protective equipment –
Part 4:
Particular requirements for equipment using
vision based protective devices (VBPD)

Sécurité des machines –
Equipements de protection électro-sensibles –
Partie 4:
Exigences particulières pour les équipements
utilisant des dispositifs protecteurs par
vision (VBPD)
PRICE CODE
T
Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
Pour prix, voir catalogue en vigueur

– 2 – TR 61496-4 © IEC:2007
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative references.6
3 Terms and definitions .7
4 Functional, design and environmental requirements .8
4.1 Functional requirements .8
4.2 Design requirements.11
4.3 Environmental requirements .13
5 Testing .14
5.1 General .14
5.2 Functional tests .15
5.4 Environmental tests .19
6 Marking for identification and safe use .23
6.1 General .24
7 Accompanying documents .24

Figure 1 – Side view of VBPD using a passive pattern .9
Figure 2 – Examples of circular disc test pieces according to 4.2.13.3 .10
Figure 3 – Lux measurement setup at indirect light tests.22

Table 1 – Verification of detection capability requirements (see also 4.2.12) .16

TR 61496-4 © IEC:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –

Part 4: Particular requirements for equipment
using vision based protective devices (VBPD)

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC 61496-4, which is a technical report, has been prepared by IEC technical committee 44:
Safety of machinery – Electrotechnical aspects, in collaboration with CENELEC technical
committee 44X: Safety of machinery – Electrotechnical aspects

– 4 – TR 61496-4 © IEC:2007
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
44/536/DTR 44/545/RVC
Full information on the voting for the approval of this technical report 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.
This technical report constitutes Part 4 of the IEC 61496 series and is intended to be read in
conjunction with IEC 61496-1. When a particular clause or subclause of IEC 61496-1 is not
mentioned in this technical report, that clause or subclause applies as far as is reasonable.
Where this technical report states "addition", "modification" or "replacement", the relevant text
of IEC 61496-1 is to be adapted accordingly.
A list of all the parts of IEC 61496, under the general title Safety of machinery – Electro-
sensitive protective equipment, can be found on the IEC website.
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
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
TR 61496-4 © IEC:2007 – 5 –
INTRODUCTION
This technical report provides information related to the design, construction and testing of
electro-sensitive protective equipment (ESPE) that employs vision-based protective devices
(VBPDs) for the sensing function for the safeguarding of machinery.
At the time of writing this technical report, there were no commercial examples of VBPDs on
the market. Therefore, to provide an example of a VBPD for the writing of this technical report,
the working group used the results of a Japanese research project. The working group
understands that the possibilities for VBPDs are much greater than the limited technologies
demonstrated by this example. When real systems do arrive, it is believed that some of the
basic concepts put forth in this technical report can be used as a guide for the evaluation and
testing of those first systems.
It is anticipated that the characteristics and requirements for VBPDs will vary significantly
depending on the underlying technologies and methodologies employed. Therefore, it is
planned that this technical report will be divided into subparts which address the unique
requirements of the different types of vision-based devices (for example IEC 61496-4-1 would
cover general requirements and IEC 61496-4-2 would cover requirements unique to devices
using a passive reference pattern).

– 6 – TR 61496-4 © IEC:2007
SAFETY OF MACHINERY –
ELECTRO-SENSITIVE PROTECTIVE EQUIPMENT –

Part 4: Particular requirements for equipment
using vision based protective devices (VBPD)

1 Scope
NOTE As an example for the development of this technical report, a VBPD is defined as consisting of a single
image-sensing device viewing one two-dimensional image against a passive pattern as the background and where
...