EN ISO 13856-1:2013

SLOVENSKI STANDARD
01-november-2013
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SIST EN 1760-1:2000+A1:2009
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Safety of machinery - Pressure-sensitive protective devices - Part 1: General principles
for design and testing of pressure-sensitive mats and pressure-sensitive floors (ISO
13856-1:2013)
Sicherheit von Maschinen - Druckempfindliche Schutzeinrichtungen - Teil 1: Allgemeine
Leitsätze für die Gestaltung und Prüfung von Schaltmatten und Schaltplatten (ISO 13856
-1:2013)
Sécurité des machines - Dispositifs de protection sensibles à la pression - Partie 1:
Principes généraux de conception et d'essai des tapis et planchers sensibles à la
pression (ISO 13856-1:2013)
Ta slovenski standard je istoveten z: EN ISO 13856-1:2013
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 13856-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2013
ICS 13.110 Supersedes EN 1760-1:1997+A1:2009
English Version
Safety of machinery - Pressure-sensitive protective devices -
Part 1: General principles for design and testing of pressure-
sensitive mats and pressure-sensitive floors (ISO 13856-1:2013)
Sécurité des machines - Dispositifs de protection sensibles Sicherheit von Maschinen - Druckempfindliche
à la pression - Partie 1: Principes généraux de conception Schutzeinrichtungen - Teil 1: Allgemeine Leitsätze für die
et d'essai des tapis et planchers sensibles à la pression Gestaltung und Prüfung von Schaltmatten und
(ISO 13856-1:2013) Schaltplatten (ISO 13856-1:2013)
This European Standard was approved by CEN on 7 March 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 13856-1:2013: 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 13856-1:2013) 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 October 2013, and conflicting national standards shall be withdrawn at
the latest by October 2013.
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 1760-1:1997+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 13856-1:2013 has been approved by CEN as EN ISO 13856-1:2013 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
European 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 EU Directives may be applicable to the product(s) falling within
the scope of this standard.
INTERNATIONAL ISO
STANDARD 13856-1
Second edition
2013-04-15
Safety of machinery — Pressure-
sensitive protective devices —
Part 1:
General principles for design and
testing of pressure-sensitive mats and
pressure-sensitive floors
Sécurité des machines — Dispositifs de protection sensibles à la
pression —
Partie 1: Principes généraux de conception et d’essai des tapis et
planchers sensibles à la pression
Reference number
ISO 13856-1:2013(E)
©
ISO 2013
ISO 13856-1:2013(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.
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
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Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 13856-1:2013(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements for design and testing . 3
4.1 General . 3
4.2 Actuating force . 5
4.3 Response time. 7
4.4 Static loading . 7
4.5 Number of operations . 7
4.6 Output state of sensor . 7
4.7 Response of output signal switching device(s) to actuating force . 8
4.8 Access for maintenance . 8
4.9 Adjustments . 8
4.10 Connections . 9
4.11 Environmental conditions . 9
4.12 Power supply .10
4.13 Electrical equipment .10
4.14 Enclosure .11
4.15 Performance levels and categories for SRP/CSs in accordance with ISO 13849-1 .11
4.16 Sensor fittings .12
4.17 Tripping .12
4.18 Slip-resistance .12
4.19 Additional coverings of top surfaces of sensor(s) .13
4.20 Failure due to blocking or wedging .13
5 Marking .13
5.1 General .13
5.2 Marking of control unit .13
5.3 Marking of sensor .13
5.4 Marking of other components .13
6 Information for use .13
6.1 General .13
6.2 Instructions for use .14
7 Testing .16
7.1 General .16
7.2 Sensor test sample .17
7.3 Test pieces for load tests .17
7.4 Test No. 1 — Actuating force .18
7.5 Test No. 2 — Response time .20
7.6 Test No. 3 — Static loading .22
7.7 Test No. 4 — Number of operations .22
7.8 Test No. 5 — Output state of sensor .27
7.9 Test No. 6 — Response of output signal switching device to actuating force .28
7.10 Test No. 7 — Access for maintenance .28
7.11 Test No. 8 — Adjustments .28
7.12 Test No. 9 — Connections .28
7.13 Test No. 10 — Environmental conditions .28
7.14 Test No. 11 — Electrical power supply .30
7.15 Test No. 12 — Electrical equipment .30
7.16 Test No. 13 — Enclosure .30
7.17 Test No. 14 — PL according to ISO 13849-1 .30
ISO 13856-1:2013(E)
7.18 Test No. 15 — Slip-resistance.30
7.19 Test No. 16 — Additional coverings of top surfaces of sensor(s) .30
7.20 Test No. 17 — Failure due to blocking or wedging .31
Annex A (normative) Timing diagrams for pressure-sensitive mats/floors with/without reset .32
Annex B (informative) Application notes .35
Annex C (informative) Design notes .40
Annex D (informative) Installation, commissioning and testing .45
Bibliography .47
iv © ISO 2013 – All rights reserved

ISO 13856-1:2013(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 13856-1 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 13856-1:2001) 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
ISO 13856-1:2013(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 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.
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.
vi © ISO 2013 – All rights reserved

INTERNATIONAL STANDARD ISO 13856-1:2013(E)
Safety of machinery — Pressure-sensitive protective
devices —
Part 1:
General principles for design and testing of pressure-
sensitive mats and pressure-sensitive floors
1 Scope
This part of ISO 13856 establishes general principles and specifies requirements for the design and
testing of pressure-sensitive mats and pressure-sensitive floors normally actuated by the feet for use as
devices for protecting persons from hazardous machinery. The minimum safety requirements for the
performance, marking and documentation are given.
This part of ISO 13856 is applicable to pressure-sensitive mats and pressure-sensitive floors, regardless
of the type of energy used (e.g. electrical, hydraulic, pneumatic or mechanical), designed to detect
— persons weighing more than 35 kg, and
— persons (e.g. children) weighing more than 20 kg.
It is not applicable to the detection of persons weighing less than 20 kg.
It does not specify the following because they are application-specific:
a) dimensions or configuration of the effective sensing area of pressure-sensitive mat(s) or pressure-
sensitive floor(s) in relation to any particular application;
b) when pressure-sensitive mats or floors are appropriate in a particular situation;
c) performance levels (PLs) for safety-related parts of control systems (SRP/CSs) other than providing
a minimum level.
This part of ISO 13856 gives guidance to assist the user (i.e. machinery manufacturer and/or user of the
machinery) in providing an adequate arrangement.
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 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, Safety of machinery — Positioning of safeguards with respect to the approach speeds of parts
of the human body
ISO 15552, Pneumatic fluid power — Cylinders with detachable mountings, 1 000 kPa (10 bar) series, bores
from 32 mm to 320 mm — Basic, mounting and accessories dimensions
ISO 13856-1:2013(E)
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 60068-2-78, 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 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 61000-6-2, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for
industrial environments
IEC 61439-1:2011, 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, ISO 13849-1 and the
following apply.
3.1
pressure-sensitive mat
sensitive protective equipment (ISO 12100:2010, 3.28.5) comprising a sensor (3.3) or sensors, a control
unit (3.5) and one or more one or more output signal switching devices (3.6) which detects a person
standing on it or who steps onto it and where the effective sensing area (3.4) is deformed locally when
the sensor(s) is actuated
Note 1 to entry: See Figure 1 for a schematic sketch of a pressure-sensitive mat.
3.2
pressure-sensitive floor
sensitive protective equipment (ISO 12100:2010, 3.28.5) comprising a sensor (3.3) or sensors, a control unit
(3.5) and one or more output signal switching devices (3.6) which detects a person standing on it or who
steps onto it and where the effective sensing area (3.4) is moved as a whole when the sensor(s) is actuated
Note 1 to entry: See Figure 1 for a schematic sketch of a pressure-sensitive floor.
3.3
sensor
part of the pressure-sensitive mat (3.1) or pressure-sensitive floor (3.2) which contains an effective
sensing area (3.4)
Note 1 to entry: The application of an actuating force to the effective sensing area causes the signal from the
sensor to the control unit to change its state.
2 © ISO 2013 – All rights reserved

ISO 13856-1:2013(E)
3.4
effective sensing area
part of the top surface area of the sensor (3.3) or a combination of sensors of the pressure-sensitive mat
(3.1) or pressure-sensitive floor (3.2) within which a response to an actuating force will take place
Note 1 to entry: See 4.2 for requirements with regard to the actuating force.
3.5
control unit
device that responds to the condition of the sensor (3.3) and controls the state of the output signal
switching device (3.6)
Note 1 to entry: The control unit can also monitor the integrity of the pressure-sensitive mat or pressure-sensitive
floor (see reference to categories and performance levels according to ISO 13849-1) and can contain facilities for
processing a reset signal. The control unit can be integrated with the machine control system.
3.6
output signal switching device
part of the pressure-sensitive mat (3.1) or pressure-sensitive floor (3.2) which responds by producing an
OFF state when the sensor (3.3) or monitoring function means is actuated
Note 1 to entry: The output signal switching device can be integrated with the machine control system.
3.7
actuating force
any force which produces a pressure on the effective sensing area (3.4) to create an OFF state in the
output signal switching device (3.6)
3.8
reset
function which permits an ON state in the output signal switching device (3.6), providing that certain
conditions are met
3.9
ON state
state in which the output circuit(s) of an output signal switching device (3.6) is complete and permits the
flow of current or fluid
3.10
OFF state
state in which the output circuit or circuits of an output signal switching device (3.6) are broken and
interrupt the flow of current or fluid
3.11
response time
time between the start of the application of a force to the effective sensing area (3.4) and the start of the
OFF state of the output signal switching device (3.6)
Note 1 to entry: See 4.3 for requirements with regard to the response time.
3.12
dead zone
part of the top surface area of the sensor (3.3) outside the effective sensing area (3.4)
4 Requirements for design and testing
4.1 General
The following requirements are based on the assumption that the user (e.g. machine manufacturer or
user of the machinery) determines the suitability of a pressure-sensitive mat or pressure-sensitive floor,
ISO 13856-1:2013(E)
the required PL and the dimensions and orientation. It is also assumed that this information is given to
the manufacturer of the pressure-sensitive protective device.
Pressure-sensitive mats and pressure-sensitive floors shall be able to detect a person who is standing
on, or who steps onto, the effective sensing area.
Key
1 pressure-sensitive mat or pressure-sensitive floor
2 sensor(s)
3 control unit*
4 output signal switching device(s)*
5 part of machine control system for pressure-sensitive mat or pressure-sensitive floor output signal processing
a
actuating force
b
sensor output
c
ON state/OFF state signal
d
manual reset signal**
e
reset signal from machine control system (where appropriate)
f
monitoring signals (optional)
g
manual reset signal to the machine control system***
h
machine control system(s)
* Can be located within the machine control system or as part of the machine control system.
** Where appropriate, this may be used as an alternative to g.
*** Where appropriate, this may be used as an alternative to d.
Figure 1 — Systematic sketch of pressure-sensitive mat/pressure-sensitive floor applied to
machine
4 © ISO 2013 – All rights reserved

ISO 13856-1:2013(E)
4.2 Actuating force
4.2.1 Single sensor
See 7.4.1 and 7.4.2 for the test method.
The pressure-sensitive mat or pressure-sensitive floor shall respond to the actuating force in accordance
with Table 1 when the corresponding test piece (see Figure 2) is applied over the effective sensing area
−1
at a maximum speed of 2 mm⋅s within the operating temperature range.
Test pieces 1, 2 and 3 apply to pressure-sensitive mats and pressure-sensitive floors designed to detect
persons weighing more than 35 kg. Test piece 4 shall additionally be applied to pressure-sensitive mats
and pressure-sensitive floors designed to detect persons (e.g. children) weighing more than 20 kg.
Table 1 — Actuating forces
Test piece Actuating force
Application
d
No. N
mm
For pressure-sensitive mats and pressure-sensitive 1 11 300
floors designed to detect persons weighing more
2 80 300
than 35 kg
3 200 600
Additional test for pressure-sensitive mats and
pressure-sensitive floors designed to detect persons 4 40 150
(e.g. children) weighing more than 20 kg
4.2.2 Combinations of sensors
See 7.4.3 and 7.4.4 for the test method.
Where an effective sensing area is built up of more than one sensor, joints and junctions shall fulfil the
requirements of 4.2.1, except that only test piece 2, according to Table 1, applies to pressure-sensitive
mats and pressure-sensitive floors designed to detect persons weighing more than 35 kg.
Where pressure-sensitive mats and pressure-sensitive floors are designed to detect persons (e.g.
children) weighing 20 kg or more, only test pieces 2 and 4 apply.
For other parts of the effective sensing area, 4.2.1 applies.
Dimensions in millimetres
Test piece 1
ISO 13856-1:2013(E)
Test pieces 2, 3 and 4
Test piece 5
Test piece 6
Key
1 rubber “shoe”, (60 ± 5) Shore A, fixed with adhesive
2 steel
d see Table 1
a
Mounting proposal only.
Figure 2 — Test pieces 1 to 6
6 © ISO 2013 – All rights reserved

ISO 13856-1:2013(E)
4.3 Response time
See 7.5 for the test method.
The response time shall be stated by the manufacturer and shall not exceed 200 ms over the operating
temperature range. The response time is the time between a) and b) where
−1
a) is when a test piece touches vertically the effective sensing area at a speed of 0,25 m⋅s , and
b) is the start of the OFF state of the output signal switching device (see Figures A.1, A.2 and A.3).
NOTE The 200 ms limit is specified to prevent the safeguard from being defeated by the application of short
stepping impulses.
4.4 Static loading
See 7.6 for the test method.
4.4.1 After the application of a static force of (2 000 ± 50) N within the effective sensing area through
test piece 2 (see Figure 2), for a period of 8 h, the output signal switching device shall change its state
within 2 min after the removal of the force. For pressure-sensitive mats, after 1 h the deformation shall
not be more than 2 mm in depth at the lowest part of the top surface; for pressure-sensitive floors, there
shall not be any permanent deformation.
4.4.2 After the application of a static force of (750 ± 20) N within the effective sensing area through
test piece 1 (see Figure 2) at another location to that used in 4.4.1 for a period of 8 h, the output signal
switching device shall change its state within 2 min after the removal of the force. For pressure-sensitive
mats, after 1 h the deformation shall not be more than 2 mm in depth at the lowest part of the top surface;
for pressure-sensitive floors, there shall not be any permanent deformation.
4.5 Number of operations
See 7.7 for the test method.
4.5.1 A pressure-sensitive mat or pressure-sensitive floor shall perform its function for the number of
operations typically expected.
4.5.1.1 The expected number of operations for the pressure-sensitive mat or pressure-sensitive floor shall
be not less than 100 000 operations in each of five locations (500 000 operations in total). If the effective
sensing area consists of a combination of sensors, this requirement shall apply to the combination of sensors.
4.5.1.2 In addition, the expected number of operations for the sensor alone is a further one million
operations in one other location.
4.5.2 When the requirements of 4.4 and 4.5.1 have been met, the pressure-sensitive mat or pressure-
sensitive floor shall still meet the requirements of 4.2 and 4.3.
4.6 Output state of sensor
See 7.8 for the test method.
When an actuating force is applied to the effective sensing area or is present on the effective sensing
area at power on, the sensor output signal shall change to a value or state which causes the output signal
switching device(s) to change to the OFF state. This value or state shall maintain the output signal switching
device(s) in the OFF state at least until the actuating force is removed (see Figures A.1, A.2 and A.3).
ISO 13856-1:2013(E)
When the pressure-sensitive mat or pressure-sensitive floor is provided with a reset, the output signal
switching device shall change its state only after the reset signal has been applied following the removal
of the actuating force.
4.7 Response of output signal switching device(s) to actuating force
4.7.1 General
See 7.9 for the test method.
When any actuating force is applied to the effective sensing area the output signal switching device(s)
shall change from an “ON” state to an “OFF” state. Similarly, the OFF state shall also be generated when
an actuating force is already present on the effective sensing area when power is put ON.
The output signal switching device shall remain in the OFF state for at least as long as the actuating force
is present on the effective sensing area.
4.7.2 Device with reset
For a pressure-sensitive mat or pressure-sensitive floor with reset, the reset signal shall be manually
applied either directly to the control unit of the safeguard or, alternatively, via the machine control
system (see Figure 1).
The reset shall perform two functions:
a) start inhibit interlock — at power ON the output signal switching device(s) shall remain in the OFF
state until the reset signal is applied;
b) re-start inhibit interlock
After the actuating force has been removed, the output of the output signal switching device(s) shall
change to an ON state only after the application of a reset signal.
If the reset signal is applied continuously before or while the actuating force is applied, the output of the
output signal switching device(s) shall not change to an ON state when the actuating force is removed
without the application of an additional reset signal (see Figures A.1 and A.2).
The reset signal shall control either the output of the sensor and the output signal switching device(s)
(see Figure A.1) or it shall control the output of the output signal switching device(s) only (see Figure A.2).
4.7.3 Device without reset
For a pressure-sensitive mat or pressure-sensitive floor without reset, the output signal of the output
signal switching device(s) shall change to an ON state at power ON and after the actuating force has been
removed (see Figure A.3).
If a device without reset is used, then the reset function should be provided in the machine control
system (see ISO 13849-1:2006, 5.4).
4.8 Access for maintenance
See 7.10 for the test method.
Where access is required to the interior of any part of the pressure-sensitive mat or pressure-sensitive
floor, it shall be possible only by means of a key or tool. Any means of securing an enclosure, excluding
the key or tool for opening, shall be captive.
4.9 Adjustments
See 7.11 for the test method.
8 © ISO 2013 – All rights reserved

ISO 13856-1:2013(E)
There shall be no means of adjustment by the user of the actuating force or response time. Where the
supplier states that sub-assemblies of the pressure-sensitive mat or pressure-sensitive floor can be
individually replaced, this shall be possible without reducing the overall performance of the pressure-
sensitive mat or pressure-sensitive floor and without the need for adjustment.
4.10 Connections
See 7.12 for the test method.
The correct alignment of plug/sockets shall be made clear by either type, shape, marking or designation
(or a combination of these).
Where components of different configurations existing within the pressure-sensitive mat or pressure-
sensitive floor are interchangeable, incorrect placement or exchange of these components shall not
cause failure to danger.
If a sensor or subsystem is connected by a plug and socket, removal or disconnection of the sensor or
subsystem at the plug and socket from or within the control unit shall cause the output signal switching
device(s) to go to an OFF state.
4.11 Environmental conditions
4.11.1 General
See 7.13 for the test method.
The pressure-sensitive mat or pressure-sensitive floor shall continue to operate in accordance with this
part of ISO 13856 in the environmental conditions given in 4.11.2 to 4.11.5 or in any wider range stated
by the manufacturers.
4.11.2 Temperature
The pressure-sensitive mat or pressure-sensitive floor shall comply with the requirements of 4.2.1 and
4.3 over a temperature range from 5 °C to 40 °C.
NOTE Extended environmental temperature ranges can be from –25 °C to 40 °C and from 5 °C to 70 °C.
4.11.3 Humidity
The requirements for the resistance to humidity shall be in accordance with IEC 60068-2-78, for a period
of four days.
4.11.4 Electromagnetic compatibility (immunity)
The pressure-sensitive mat or pressure-sensitive floor shall continue in normal operation when
subjected to level/class 3 in accordance with Table 4 (see 7.13.4).
4.11.5 Vibration
The requirements concerning vibration shall apply to the control unit and the output signal switching
device(s) only and shall be in accordance with IEC 60068-2-6. The following shall apply:
— frequency range, 10 Hz to 55 Hz;
— displacement, 0,15 mm;
— 10 cycles per axis;
— sweep rate, one octave per minute.
ISO 13856-1:2013(E)
Where a sensor is fixed to a part of a machin
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