EN 1760-2:2001+A1:2009

SLOVENSKI STANDARD
01-maj-2009
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SIST EN 1760-2:2002
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Safety of machinery - Pressure sensitive protective devices - Part 2: General principles
for the design and testing of pressure sensitive edges and pressure sensitive bars
Sicherheit von Maschinen - Druckempfindliche Schutzeinrichtungen - Teil 2: Allgemeine
Leitsätze für die Gestaltung und Prüfung von Schaltleisten und Schaltstangen
Sécurité des machines - Dispositifs de protection sensibles à la pression - Partie 2:
Principes généraux de conception et d'essais des bords et barres sensibles à la pression
Ta slovenski standard je istoveten z: EN 1760-2:2001+A1:2009
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 1760-2:2001+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2009
ICS 13.110 Supersedes EN 1760-2:2001
English Version
Safety of machinery - Pressure sensitive protective devices -
Part 2: General principles for the design and testing of pressure
sensitive edges and pressure sensitive bars
Sécurité des machines - Dispositifs de protection sensibles Sicherheit von Maschinen - Druckempfindliche
à la pression - Partie 2: Principes généraux de conception Schutzeinrichtungen - Teil 2: Allgemeine Leitsätze für die
et d'essais des bords et barres sensibles à la pression Gestaltung und Prüfung von Schaltleisten und
Schaltstangen
This European Standard was approved by CEN on 13 January 2001 and includes Amendment 1 approved by CEN on 22 February 2009.

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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1760-2:2001+A1:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .5
Introduction .7
1 Scope .7
2 Normative references .8
3 Terms and definitions . 10
4 Requirements . 17
4.1 Effective sensing surface . 17
4.2 Actuating force (see 7.4 and 7.5 for test method) . 18
4.3 Pre-travel (see 7.6.1 for test method). 18
4.4 Overtravel (see 7.6.3 for test method) . 18
4.5 Working travel (see 7.6.2 for test method) . 18
4.6 Force-travel relationship(s) (see 7.6 for test method). 19
4.7 Minimum operating speed (see 7.5 for test method) . 20
4.8 Number of operations (see 7.7 for test method) . 20
4.8.1 Single sensors (see 7.7.1 for test method) . 20
4.8.2 Combination of sensors (see 7.7.2 for test method) . 20
4.9 Sensor output (see 7.8 for test method) . 20
4.10 Response of output signal switching device to the actuating force (see 7.8 and 7.9 for test
method) . 20
4.10.1 For systems where the sensor output remains in the OFF state for as long as the
actuating force is applied. . 20
4.10.2 For systems where the sensor output does not stay in the OFF state when the actuating
force remains . 21
4.11 Reset function (see 7.9 for test method) . 21
4.12 Environmental conditions (see 7.10 for test method) . 21
4.12.1 Climatic conditions (see 7.10.2 and 7.10.3 for test method) . 21
4.12.2 Electromagnetic compatibility (see 7.10.4 for test method) . 21
4.12.3 Vibration (see 7.10.5 for test method). 22
4.12.4 Bump (see 7.10.6 for test method) . 22
4.13 Power supply variation . 22
4.13.1 Electrical power supply variation (see 7.11.1 for test method) . 22
4.13.2 Non-electrical power supply variations (see 7.11.2 for test method) . 22
4.14 Electrical equipment (see 7.12.1 for test method) . 23
4.14.1 General . 23
4.14.2 Protection against electric shock . 23
4.14.3 Protection against overcurrent . 23
4.14.4 Electromechanical devices . 23
4.14.5 Pollution degree . 23
4.14.6 Clearance, creepage distances and isolating distances . 23
4.14.7 Wiring . 23
4.15 Pneumatic equipment (see 7.12.2 for test method). 23
4.16 Hydraulic equipment (see 7.12.3 for test method) . 23
4.17 Enclosure (see 7.13 for test method) . 24
4.17.1 Sensor . 24
4.17.2 Control unit and output signal switching device . 24
4.18 Additional coverings for sensors (see 7.14 for test method) . 24
4.19 Access (see 7.15 for test method). 24
4.20 Categories according to EN 954-1 (see 7.16 for test method) . 24
4.21 Adjustments (see 7.17 for test method) . 25
4.22 Sensor fixing and mechanical strength (see 7.18 for test method) . 25
4.23 Recovery after deformation (see 7.19 for test method) . 25
4.24 Connections (see 7.20 for test method) . 25
4.25 Sharp corners, sharp edges and rough surfaces (see 7.21 for test method) . 26
4.26 Mechanical features (see 7.22 for test method) . 26
4.27 Inhibition and blocking (see 7.25 for test method) . 26
5 Marking (see 7.23 for test method) . 26
6 Information for selection and use (see 7.3 and 7.24 for test method) . 26
6.1 General . 26
6.2 Essential data for the selection of a suitable device(s) . 26
6.3 Information for use . 27
6.3.1 Information for installation and commissioning . 27
6.3.2 Information relating to the operation of the device . 29
7 Verification of requirements . 30
7.1 Test samples . 30
7.1.1 Sensor. 30
7.1.2 Control units and output signal switching devices . 31
7.2 Test pieces . 31
7.3 Test number 1: Safety-related data for selection, installation, commissioning, operation
and maintenance of a suitable device(s) (see 6.2 and 6.3) . 31
7.4 Test number 2: Mounting orientations of sensors (see 3.20 and figure 5) . 31
7.4.1 Edge sensors . 31
7.4.2 Bar sensors . 32
7.5 Test number 3: Actuating force (requirements see 4.2) . 32
7.5.1 Single sensor at 20 ˚C . 32
7.5.2 Combination of sensors at 20 ˚C . 34
7.5.3 Single sensor over the operating temperature range . 36
7.5.4 Combination of sensors over the operating temperature range . 36
7.6 Test number 4: Force-travel relationship(s) (requirements see 4.6) . 38
7.6.1 Pre-travel (requirements see 4.3) . 38
7.6.2 Working travel (requirements see 4.5) . 38
7.6.3 Overtravel (requirements see 4.4) . 38
7.7 Test number 5: Number of operations (requirements see 4.8) . 39
7.8 Test number 6: Output state of the sensor and the output signal switching device
(requirements see 4.9 and 4.10) . 39
7.9 Test number 7: Response of output signal switching device to the actuating force, the
reset and the state of the power supply (requirements see 4.10 and 4.11) . 39
7.10 Test number 8: Environmental tests (requirements see 4.12) . 40
7.10.1 Functional test . 40
7.10.2 Test number 8.1: Operating temperature range (requirements see 4.12.1) . 40
7.10.3 Test number 8.2: Humidity (requirements see 4.12.1) . 40
7.10.4 Test number 8.3: Electromagnetic compatibility (requirements see 4.12.2) . 40
7.10.5 Test number 8.4: Vibration (requirements see 4.12.3) . 41
7.10.6 Test number 8.5: Bump (requirements are only for bars: see 4.12.4) . 41
7.11 Test number 9: Power supply variation (requirements see 4.13) . 42
7.11.1 Test number 9.1: Electrical power supply variation (requirements see 4.13.1) . 42
7.11.2 Test 9.2: Non-electric power supply variations (requirements see 4.13.2) . 42
7.12 Test number 10: Electrical, pneumatic and hydraulic equipment (requirements see 4.14,
4.15 and 4.16) . 42
7.12.1 Test number 10.1: Electrical equipment (requirements see 4.14) . 42
7.12.2 Test number 10.2: Pneumatic equipment (requirements see 4.15) . 42
7.12.3 Test number 10.3: Hydraulic equipment (requirements see 4.16). 42
7.13 Test number 11: Enclosure (requirements see 4.17) . 42
7.14 Test number 12: Additional coverings for sensors (requirements see 4.18) . 43
7.15 Test number 13: Access (requirements see 4.19) . 43
7.16 Test number 14: Category(ies) (requirements see 4.20) . 43
7.17 Test number 15: Adjustments (requirements see 4.21) . 43
7.18 Test number 16: Sensor fixing (requirements see 4.22) . 43
7.19 Test number 17: Recovery after deformation (requirements see 4.23) . 43
7.20 Test number 18: Connections (requirements see 4.24) . 43
7.21 Test number 19: Sharp corners, sharp edges and rough surfaces (requirements see 4.25) . 44
7.22 Test number 20: Mechanical features (requirements see 4.26) . 44
7.23 Test number 21: Marking (requirements see clause 5). 44
7.24 Test number 22: Information for selection and use (requirements see clause 6) . 44
7.25 Test number 23: Inhibition and blocking (requirements see 4.27) . 44
Annex A (normative) Timing diagrams for devices with and without reset . 45
Annex B (informative) Explanatory notes . 49
Annex C (informative) Notes to the machinery manufacturer/user . 51
C.1 Introduction . 51
C.2 Selection of suitable devices . 51
C.2.1 General . 51
C.2.2 Selection procedure . 51
Annex D (informative) Design notes . 53
D.1 General . 53
D.1.1 Frequency of operation . 53
D.1.2 Components . 53
D.1.3 Affects of liquid . 53
D.2 Pressure sensitive edges . 53
D.2.1 Profile material . 53
D.2.2 Sensor sensitivity . 53
D.2.3 Physical effects . 53
D.2.4 Pressure sensitive edges with electric sensors . 54
D.2.5 Pressure sensitive edges with air pulse sensors. 54
D.2.6 Pressure sensitive edges with fibre optic sensors . 54
D.3 Pressure sensitive bars . 55
D.3.1 Use of position detection switches. 55
D.3.2 Trap points . 55
Annex E (informative) Application notes . 56
E.1 Sensor mounting . 56
E.2 Environmental considerations . 56
E.3 Sensor positioning . 56
Annex F (informative) Installation, commissioning and test . 57
F.1 System information . 57
F.2 Commissioning . 57
F.3 Regular inspection and tests . 58
F.4 Inspection and tests after maintenance . 58
Annex G (informative) General considerations for systems meeting category 2 according to
EN 954-1 . 59
Annex ZA (informative) Clauses of this European Standard addressing essential requirements or
other provisions of EU directives . 60
Annex ZB (informative) !Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC" . 61
Bibliography . 62

Foreword
This document (EN 1760-2:2001+A1:2009) has been prepared by 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 October 2009, and conflicting national standards shall be withdrawn at
the latest by December 2009.
This document includes Amendment 1, approved by CEN on 2009-02-22.
This document supersedes EN 1760-2:2001.
The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ".
This European Standard 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 Annexes ZA and ZB, which are integral parts of this
document."
This is the second part of a multi-part type B Standard which will cover safety devices that detect the presence
of a person through the application of a pressure or force by a part of the person's body. After actuation the
safety devices give a stop command which is used by the control system of the machine to provide protection
for the person who caused the device to be actuated.
The other parts of the standard cover:
Part 1: Safety of machinery - Pressure sensitive protective devices - General principles for the design and
testing of pressure sensitive mats and pressure sensitive floors.
Part 3: Safety of machinery - Pressure sensitive protective devices - General principles for the design and
testing of pressure sensitive bumpers and plates including pressure sensitive wires and barriers !deleted
text".
Normative annex A presents timing diagrams for devices with and without reset. Informative annex B explains
the relationship between operating speed, the force exerted on the body and the distance travelled by the
device following actuation. The notes in informative annex C provide guidance to users on the selection of a
suitable device. It is recommended that the supplier and customer liaise to examine carefully the constraints
presented by the application before placing an order for the equipment.
The safeguarding of machinery !(see 3.20 of EN ISO 12100-1:2003)" can be achieved by many different
means. These means include guards which prevent access to the hazard zone by means of a physical barrier
(e.g. fixed guards to EN 953 and interlocking guards to EN 1088); and protective devices, (e.g. electro-
sensitive protective equipment to !EN 61496-1, CLC/TS 61496-2 and CLC/TS 61496-3" and pressure-
sensitive protective devices to this standard).
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 !EN ISO 14121-1"). The best solution may combine several of these different means. It is
recommended that the machinery / installation supplier and the user examine together carefully the existing
constraints before making their decision on the choice of safeguarding means.
The notes in informative annex D give guidance regarding the design of pressure sensitive edges and
pressure sensitive bars. Informative annex E gives guidance on the application of pressure sensitive edges
and pressure sensitive bars. Informative annex F gives guidance on installation, commissioning and testing.
Informative annex G covers general considerations for meeting category 2 according to EN 954-1.
This European Standard does not specify the dimensions or the configuration of the effective sensing surface
of pressure sensitive edges or pressure sensitive bars in relation to any particular application. However, there
is a requirement for the manufacturer of any safety device to provide sufficient information to enable the user
(i.e. the machinery manufacturer and / or the user of the machinery) to specify an adequate arrangement.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.

Introduction
!Pressure sensitive edges and pressure sensitive bars are safety devices of the "mechanically actuated trip
device" type. General requirements for these devices (as well as other safety devices) are given in 5.1 and 5.2
of EN ISO 12100-2:2003."
Pressure sensitive edges and bars are used in a wide range of applications with different conditions of use
relating, for example, to loading, electrical, physical and chemical environments. They are interfaced with
machine controls to ensure that the machine reverts to a safe condition if the device is actuated.
Pressure sensitive edges and pressure sensitive bars may be fitted to a moving part of a machine at the point
where a trapping, crushing or collision hazard may occur. They may also be fitted to a fixed part of a machine
or an obstacle to prevent trapping or crushing hazards with a moving part of a machine. Pressure sensitive
edges and pressure sensitive bars are designed, selected, installed and/or interfaced with the control system
of the machine so that the force/pressure applied to a person or parts of the body do not exceed certain limits.
!This European Standard is a type-B standard as stated in EN ISO 12100-1."
Pressure sensitive edges, bars, bumpers and barriers have many similarities. The following table summarises
the differences which generally apply between the devices and gives guidance for their application.
Table 1 — Characteristic features of pressure sensitive devices excluding mats and floors

Edge Bar Bumper
Part 2 Part 3
Cross section regular regular regular /
irregular
Length/Width >1 any ratio any ratio
ratio
Effective sensing deflects moves as a deflects locally
surface locally whole and / or moves
as a whole
Intended to finger finger
detect hand hand hand
arm arm arm
leg leg leg
head head head
torso torso torso
1 Scope
This standard contains requirements for pressure sensitive edges and pressure sensitive bars for use as
safety devices and not as actuating devices for normal operational. The standard applies to pressure sensitive
edges and pressure sensitive bars used to detect persons or parts of persons who may be exposed to danger
such as hazardous moving parts.
The purpose of this standard relates primarily to safety and reliability rather than suitability. For the
relationship between safety and reliability, see annex D of EN 954-1:1996.
This standard specifies requirements for pressure sensitive edges and pressure sensitive bars with and
without an external reset facility.
This standard is restricted to the functioning of pressure sensitive edges and pressure sensitive bars and does
not specify the requirements for their application. However, clause 6 contains requirements for information for
use which has to be provided by the manufacturer. A selection procedure is given in annex C.
The design notes in annex D give additional guidance regarding the design of pressure sensitive edges and
pressure sensitive bars which will give safe and reliable service. The notes in annex E provide general
guidance regarding application, while annex G provides guidance on the application of sensors, especially for
air-pulse systems.
This standard does not specify the dimensions of the pressure sensitive edges or bars in relation to a
particular application.
The standard does not apply to stopping devices according to EN 60204-1 used only for normal operational,
including emergency stopping, of machinery. Additional requirements may be necessary where pressure
sensitive edges and pressure sensitive bars are used in locations accessible to elderly or disabled people or
children.
NOTE It may not be possible to carry out all the tests in this standard for pressure sensitive edges and pressure
sensitive bars when they have been designed and built into the machinery by its manufacturer.
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."
!deleted text"
EN 954-1:1996, Safety of machinery - Safety-related parts of control systems - Part 1: General principles for
design
EN 982, Safety of machinery - Safety requirements for fluid power systems and their components – Hydraulics
EN 983, Safety of machinery - Safety requirements for fluid power systems and their components –
Pneumatics
!deleted text"
EN 50081-1, Electromagnetic compatibility - Generic emission standard - Part 1: Residential, commercial and
light industry
EN 60068-2-6, Environmental testing - Part 2: Tests - Tests Fc: Vibration (sinusoidal) (IEC 60068-2-6:1995 +
Corrigendum 1995)
EN 60068-2-14, Environmental testing - Part 2: Tests - Test N: Change of temperature (IEC 60068-2-14:1984
+ A1:1986)
EN 60068-2-29, Basic environmental testing procedures; part 2: tests; test Eb and guidance: bump (IEC
60068-2-29:1987)
EN 60204-1:1997, Safety of machinery - Electrical equipment of machines - Part 1: General requirements
(IEC 60204-1:1997)
EN 60439-1:1999, Low-voltage switchgear and controlgear assemblies - Part 1: type-tested and partially type-
tested assemblies (IEC 60439-1:1999)
EN 60529, Degrees of protection provided by enclosures (IP code) (IEC 60529:1989)
EN 60947-5-1:1997, Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching
elements - Electromechanical control circuit devices (IEC 60947-5-1:1997)
EN 61000-4-2, Electromagnetic compatibility (EMC) - Part 4: Testing and measurement techniques - Section
2: Electrostatic discharge immunity test - Basic EMC publication (IEC 61000-4-2:1995)
EN 61000-4-3, Electromagnetic compatibility (EMC) - Part 4: Testing and measurement techniques - Section
3: Radiated, radio-frequency, electromagnetic field immunity test (IEC 61000-4-3:1995, modified)
EN 61000-4-4, Electromagnetic compatibility (EMC) - Part 4: Testing and measurement techniques - Section
4: Electrical fast transient/burst immunity test - Basic EMV publication (IEC 61000-4-4:1995)
EN 61000-4-5, Electromagnetic compatibility (EMC) - Part 4: Testing and measurement techniques - Section
5: Surge immunity test (IEC 61000-4-5:1995)
EN 61000-4-6, Electromagnetic compatibility (EMC) - Part 4: Testing and measurement techniques - Section
6: Immunity to conducted disturbances, induced by radio-frequency fields (IEC 61000-4-6:1996)
EN 61000-6-2, Electromagnetic compatibility (EMC) - Part 6-2: Generic standards - Immunity for industrial
environments (IEC 61000-6-2:1999)
EN 61496-1, Safety of machinery - Electro-sensitive protective equipment - Part 1: General requirements and
tests (IEC 61496-1:1997)
!CLC/TS 61496-2:2006, Safety of machinery – Electro-sensitive protective equipment – Part 2: Particular
requirements for equipment using active opto-electronic protective devices (AOPDs) (IEC 61496-2:2006)"
!CLC/TS 61496-3:2008, Safety of machinery – Electro-sensitive protective equipment – Part 3: Particular
requirements for active opto-electronic protective devices responsive to diffuse reflection (AOPDDR) (IEC
61496-3:2008)"
!EN ISO 12100-1:2003, Safety of machinery – Basic concepts, general principles for design – Part 1: Basic
terminology, methodology (ISO 12100-1:2003)
EN ISO 12100-2:2003, Safety of machinery – Basic concepts, general principles for design – Part 2: Technical
principles (ISO 12100-2:2003)"
IEC 60068-2-3, Basic environmental testing procedures. Part 2: Tests. Test Ca: Damp heat, steady state
IEC 60664-1, Insulation co-ordination for equipment within low-voltage systems; Part 1: Principles,
requirements and tests
3 Terms and definitions
!For the purposes of this document, the terms and definitions given in EN ISO 12100-1:2003 and the
following apply."
3.1
pressure sensitive edge
safety device of the 'mechanically activated trip' type !deleted text" intended to detect the touch of a
person or part of a person and comprising:
a) sensor(s) which generates a signal when pressure is applied to part of its surface, where:
 the length is greater than the width;
 the cross section throughout the pressure sensitive area is constant;
 the width of the cross section is greater than 8 mm;
 the effective sensing surface is deformed locally to actuate the sensor(s);
NOTE The width of the cross section is usually less than or equal to 80 mm.
b) a control unit, which responds to the signal from the sensor and generates an output signal(s) to the
control system of a machine.
3.2
pressure sensitive bar
safety device !deleted text" comprising:
a) a sensor(s) which generates a signal when pressure is applied to part of its surface, where:
 the length is greater than the width;
 the cross section throughout the pressure sensitive area is constant;
 the width of the cross section is greater than 8 mm;
 the effective sensing surface moves as a whole to actuate the sensor(s).
NOTE The width of the cross section is usually less than or equal to 80 mm.
NOTE 2 The surface of a pressure sensitive bar can also deform locally but the deformation does not actuate the
sensor(s).
b) a control unit, which responds to the signal from the sensor and generates an output signal(s) to the
control system of a machine.
3.3
sensor
that part of the pressure sensitive edge or pressure sensitive bar which generates a signal in response to
sufficient pressure applied to part of its surface
3.4
control unit
that part of the pressure sensitive edge or pressure sensitive bar which responds to the condition of the
sensor and generates output signals to the machine control system
1) Pressure sensitive edge or bar
2) Sensor(s)
3) Control unit (may be located within the machine control system enclosure or be part of the
machine control system)
4) Output signal switching device(s) (may be located within the machine control system enclosure or
be part of the machine control system)
5) Part of the machine control system for pressure sensitive edge/pressure sensitive bar output
signal processing
6) Actuating force
7) Sensor output signal
8) ON state/OFF state signal
9) Manual reset signal (where appropriate alternative to A)
10) Reset signal from machine control system (where appropriate)
11) Monitoring signals (optional)
A) Manual reset signal to the machine control system (where appropriate alternative to 9).
B) Machine control system(s)
Figure 1 — Pressure sensitive edge or pressure sensitive bar applied to a machine
3.5
output signal switching device
a part of the control unit of a pressure sensitive edge or pressure sensitive bar which is connected to the
machine control system and transmits output signals
NOTE Definitions above describe the functional components of a pressure sensitive edge or bar. These functions
may be integrated into a single assembly or may be contained in any number of separate assemblies (see figure 1).
For example a simple pressure sensitive edge or pressure sensitive bar actuating a position detection switch may be
considered to be the sensor, the control unit, and the output signal switching device.
3.6
ON state of output signal switching device(s)
the state in which the output circuit(s) is complete and permits the flow of current or fluid
3.7
OFF state of output signal switching device(s)
the state in which the output circuit(s) is broken and interrupts the flow of current or fluid
3.8
actuating force
any force applied to the sensor which causes the output signal switching device(s) to go to the OFF state
3.9
effective sensing surface
that part of the surface of the sensor or a combination of sensors within the effective sensing angle and the
effective sensing length where the application of an actuating force creates an OFF state in the output signal
switching device (see, for example, figures 2 and 3)
3.10
effective sensing length
the length of the effective sensing surface
3.11
reference axis
a line in the direction of the length of the sensor, whose position in the cross-sectional view of the sensor is
used to define the effective sensing surface (see figures 2 and 3)
3.12
effective sensing angle
the angle around the reference axis, which limits the effective sensing surface along the effective sensing
length (see figures 2 and 3)
3.13
reference direction
that direction of actuation, from a point on the effective sensing surface towards the reference axis, which
bisects the effective sensing angle and is normal to the reference axis (see figures 2 and 3)
3.14
dead surface(s)
the part of the surface area of the sensor outside the effective sensing surface (see figures 2 and 3)
3.15
pre-travel
the distance travelled by an object, moving in a direction normal to the reference axis and in the axis of the
applied actuating force measured from where this object touches the effective sensing surface to where the
output signal switching device(s) changes to an OFF state under specified conditions (see figure 4)

1 reference direction
effective sensing
2 reference axis
surface
L effective sensing length
dead surface
α effective sensing angle
β see 7.4.1
Figure 2 — Effective sensing surfaces of pressure sensitive edges
3.16
working travel
the distance travelled by an object, moving in a direction normal to the reference axis, from where this object
touches the effective sensing surface, under specified conditions, to where a stated limit force is exerted on
the object (see figure 4)
1 reference direction
effective sensing
2 reference axis
surface
L effective sensing length
dead surface
α effective sensing angle
β see 7.4.1
Figure 3 — Effective sensing surface of pressure sensitive bars

a force (N) 1 stated limit force
b travel (mm) 2 lowest actuating force
c pre-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
A pre-travel (actuating point and actuating maximum operating)
B working travel (for example, occurs at 250 N or 400 N operating speed of less than or equal
to 10 mm/s)
C total travel (for example, occurs at 600 N operating speed of less than or equal to 10 mm/s)
test piece 1 according to figure 6 is used to apply the forces
Figure 4 — A diagram of force - travel relationship
3.17
overtravel
the di
...