SIST EN IEC 61010-2-201:2025

SLOVENSKI STANDARD
01-februar-2025
Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko
uporabo - 2-201. del: Posebne zahteve za opremo za krmiljenje (IEC 61010-2-
201:2024)
Safety requirements for electrical equipment for measurement, control, and laboratory
use - Part 2-201: Particular requirements for control equipment (IEC 61010-2-201:2024)
Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2
-201: Besondere Anforderungen für Steuer- und Regelgeräte (IEC 61010-2-201:2024)
Exigences de securité pour appareils électriques de mesurage, de
régulation et de laboratoire - Partie 2-201: Exigences particulières pour
les équipements de commande (IEC 61010-2-201:2024)
Ta slovenski standard je istoveten z: EN IEC 61010-2-201:2024
ICS:
19.080 Električno in elektronsko Electrical and electronic
preskušanje testing
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61010-2-201

NORME EUROPÉENNE
EUROPÄISCHE NORM November 2024
ICS 17.020; 19.020; 25.040.40 Supersedes EN IEC 61010-2-201:2018
English Version
Safety requirements for electrical equipment for measurement,
control, and laboratory use - Part 2-201: Particular requirements
for control equipment
(IEC 61010-2-201:2024)
Exigences de securité pour appareils électriques de Sicherheitsbestimmungen für elektrische Mess-, Steuer-,
mesurage, de régulation et de laboratoire - Partie 2-201: Regel- und Laborgeräte - Teil 2-201: Besondere
Exigences particulières pour les équipements de Anforderungen für Steuer- und Regelgeräte
commande (IEC 61010-2-201:2024)
(IEC 61010-2-201:2024)
This European Standard was approved by CENELEC on 2024-11-28. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61010-2-201:2024 E

European foreword
The text of document 65/1049/FDIS, future edition 3 of IEC 61010-2-201, prepared by TC 65
"Industrial-process measurement, control and automation" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 61010-2-201:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-11-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-11-30
document have to be withdrawn
This document supersedes EN IEC 61010-2-201:2018 and all of its amendments and corrigenda (if
any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61010-2-201:2024 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 61010-1:2010 NOTE Approved as EN 61010-1:2010 (not modified)
IEC 61010-1:2010/A1:2016 NOTE Approved as EN 61010-1:2010/A1:2019
IEC 60364-4-41 NOTE Approved as HD 60364-4-41
IEC 60664-1 NOTE Approved as EN IEC 60664-1
IEC 60715 NOTE Approved as EN 60715
IEC 60721-2-3 NOTE Approved as EN 60721-2-3
IEC 60947-1:2020 NOTE Approved as EN IEC 60947-1:2021 (not modified)
IEC 61051-2 NOTE Approved as EN IEC 61051-2
IEC 61131 series NOTE Approved as EN IEC 61131 series
IEC 61131-6 NOTE Approved as EN 61131-6
IEC 61140:2016 NOTE Approved as EN 61140:2016 (not modified)
IEC 61643 series NOTE Approved as EN IEC 61643 series
IEC 61643-21 NOTE Approved as EN 61643-21
IEC 61643-311 NOTE Approved as EN 61643-311
IEC 61643-321 NOTE Approved as EN 61643-321
IEC 61643-331 NOTE Approved as EN IEC 61643-331
IEC 61800 series NOTE Approved as EN 61800 series
IEC 62133 series NOTE Approved as EN 62133 series
IEC 62368 series NOTE Approved as EN IEC 62368 series
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Annex ZA of EN 61010-1:2010 and EN 61010-1:2010/A1:2019 is applicable, except as follows.
Add the following references:
Publication Year Title EN/HD Year
IEC 60384-14 - Fixed capacitors for use in electronic EN IEC 60384-14 -
equipment - Part 14: Sectional
specification - Fixed capacitors for
electromagnetic interference suppression
and connection to the supply mains
IEC 60695-2-11 - Fire hazard testing - Part 2-11: EN IEC 60695-2-11 -
Glowing/hot-wire based test methods -
Glow-wire flammability test method for end
products (GWEPT)
IEC 60695-11-3 - Fire hazard testing - Part 11-3: Test flames EN 60695-11-3 -
- 500 W flames - Apparatus and
confirmational test methods
IEC 60695-11-20 - Fire hazard testing - Part 11-20: Test EN 60695-11-20 -
flames - 500 W flame test method
IEC 60947-4-1 - Low-voltage switchgear and controlgear - EN IEC 60947-4-1 -
Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-
starters
IEC 60947-4-2 - Low-voltage switchgear and controlgear - EN IEC 60947-4-2 -
Part 4-2: Contactors and motor-starters -
Semiconductor motor controllers, starters
and soft-starters
IEC 60947-5-1 2016 Low-voltage switchgear and controlgear - EN 60947-5-1 2017
Part 5-1: Control circuit devices and
switching elements - Electromechanical
control circuit devices
Publication Year Title EN/HD Year
IEC 61010-1 2010 Safety requirements for electrical EN 61010-1 2010
equipment for measurement, control, and
laboratory use - Part 1: General
requirements
+ A1 (mod) 2016 + A1 2019
+ AC 2019-04
IEC 61010-2-030 - Safety requirements for electrical EN IEC 61010-2- -
equipment for measurement, control, and 030
laboratory use - Part 2-030: Particular
requirements for equipment having testing
or measuring circuits
IEC 61810-1 2015 Electromechanical elementary relays - Part EN 61810-1 2015
1: General and safety requirements

IEC 61010-2-201 ®
Edition 3.0 2024-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety requirements for electrical equipment for measurement, control, and

laboratory use –
Part 2-201: Particular requirements for control equipment

Exigences de securité pour appareils électriques de mesurage, de régulation et

de laboratoire –
Partie 2-201: Exigences particulières pour les équipements de commande

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.020, 19.020, 25.040.40 ISBN 978-2-8322-9783-4

– 2 – IEC 61010-2-201:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope and object . 8
2 Normative references . 10
3 Terms and definitions . 10
4 Tests . 13
5 Marking and documentation . 14
6 Protection against electric shock . 17
7 Protection against mechanical HAZARDS . 31
8 Resistance to mechanical stresses . 32
9 Protection against the spread of fire . 34
10 Equipment temperature limits and resistance to heat . 39
11 Protection against HAZARDS from fluids and solid foreign objects . 45
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 45
13 Protection against liberated gases and substances, explosion and implosion . 46
14 Components and subassemblies . 46
15 Protection by interlocks . 50
16 HAZARDS resulting from application . 50
17 RISK assessment . 50
Annexes . 51
Annex E (informative) Guidelines for reduction of POLLUTION DEGREES . 52
Annex F (normative) ROUTINE TESTS . 54
Annex L (informative) Index of defined terms . 56
Annex AA (informative) General approach to safety for control equipment . 57
Annex BB (informative) System drawing of isolation boundaries . 60
Annex CC (informative) Historical techniques for secondary circuits . 71
Annex DD (normative) Flammability test for magnesium alloy fire ENCLOSURES or flame
barriers (see 9.3.2) . 75
Annex EE (informative) Information and documentation and correlation to their uses . 76
Annex FF (informative) Measurement of CLEARANCES and CREEPAGE DISTANCES . 78
Bibliography . 80

Figure 101 – Typical INTERFACE/PORT of control equipment . 19
Figure 102 – Examples of insulation between separate circuits and between circuits
and ACCESSIBLE conductive parts . 24
Figure 103 – Mechanical HAZARDS, with regard to PANEL MOUNTED EQUIPMENT . 31
Figure 104 – Spread of fire HAZARDS, with regard to PANEL MOUNTED EQUIPMENT . 35
Figure 12 – Baffle . 37
Figure 13 – Area of the bottom of an ENCLOSURE to be constructed as specified in
9.3.2 c) 1) . 38
Figure 105 – General temperature test environment . 41
Figure 106 – Vented equipment . 42

IEC 61010-2-201:2024 © IEC 2024 – 3 –
Figure 107 – Non-vented equipment . 43
Figure 108 – PANEL MOUNTED EQUIPMENT extending through the wall of the end location
ENCLOSURE . 44
Figure AA.1 – Control equipment access and safety concerns . 57
Figure BB.1 – Typical system ENCLOSURE layout . 60
Figure BB.2 – Simplified system schematic . 62
Figure BB.3 – HAZARD situation of the control equipment . 63
Figure BB.4 – Application of IEC 61010-2-201 to the control equipment safety drawing . 64
Figure BB.5 – Application of 6.7.1.5 items a) and b) to the control equipment safety

drawing . 64
Figure BB.6 – Application of 6.7.1.5 items a), b), c) and d) to the control equipment
safety drawing . 65
Figure BB.7 – REINFORCED INSULATION . 66
Figure BB.8 – BASIC INSULATION . 67
Figure BB.9 – REINFORCED INSULATION, BASIC INSULATION and impedance . 68
Figure BB.10 – REINFORCED INSULATION from external power supplies . 69
Figure BB.11 – BASIC INSULATION from external power supplies . 70
Figure EE.1 – Information and documentation for component products . 76
Figure EE.2 – Information and documentation accumulation and segregation tree for
an example installation . 77
Figure FF.1 – Path of a component mounted to a PWB (side view) . 79
Figure FF.2 – Path of a component mounted to a PWB (side view) . 79

Table 101 – INTERFACES, PORTS AND TERMINALS considered as OPERATOR ACCESSIBLE for
OPEN and ENCLOSED EQUIPMENT . 18
Table 3 – Multiplication factors for clearances of equipment rated for operation at
altitudes up to 5 000 m . 25
Table 4 – CLEARANCE and CREEPAGE DISTANCES for MAINS CIRCUITS of OVERVOLTAGE
CATEGORY II up to 300 V. 27
Table 5 – Test voltages for solid insulation between MAINS and between MAINS and
secondary circuits OVERVOLTAGE CATEGORY II up to 300 V . 28
Table 6 – CLEARANCES and test voltages for secondary circuits derived from MAINS
CIRCUITS of OVERVOLTAGE CATEGORY II up to 300 V . 29
Table 16 – Acceptable perforation of the bottom of an ENCLOSURE . 36
Table 19 – Surface temperature limits, under NORMAL CONDITION . 39
Table 102 – Overload and endurance test voltages . 47
Table 103 – Overload test circuit values . 49
Table 104 – Endurance test circuit values . 50
Table E.1 – Environmental situations . 52
Table E.2 – Reduction of POLLUTION DEGREES (PD) . 53
Table CC.1 – Limits of output current and output power for inherently limited power
sources . 74
Table CC.2 – Limits of output current, output power and RATINGS for over-current

protective devices for non-inherently limited power sources . 74
Table FF.1 – Dimensions of X . 78

– 4 – IEC 61010-2-201:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-201: Particular requirements for control equipment

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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 61010-2-201 has been prepared by IEC technical committee 65: Industrial-process
measurement, control and automation. It is an International Standard.
This third edition cancels and replaces the second edition published in 2017. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) 1.1.1: the related equipment included in the Scope has been clarified;
b) 4.3.2.101: the optical fibre module has been deleted;
c) 5.4.3: equipment installation has been clarified;

IEC 61010-2-201:2024 © IEC 2024 – 5 –
d) 6.7.1.1: revision of the figure representing insulation between separate circuits has been
included;
e) 6.7.101: the subclause relating to insulation for FIELD WIRING TERMINALS of OVERVOLTAGE
ll with a nominal voltage up to 1 000 V has been deleted;
CATEGORY
f) 6.7.1.101: a new subclause relating to insulation for SELV/PELV CIRCUITS has been included;
g) 6.8.3: specification of voltage tester has been added;
h) 6.9.3: an additional exception relating to colour coding has been included;
i) 6.9.101: a new subclause relating to wiring for secondary circuits e.g. SELV/PELV has been
included;
j) 8.2.2.101: additional requirements for glass displays have been included;
k) 8.3: the subclause relating to the drop test has been removed;
l) 9.3.2: additional requirements for material of connectors and insulating material have been
included;
m) The particular requirements for non-metallic material have been clarified;
n) Clause 11: the particular requirements for protection against HAZARDS from fluid and solid
foreign objects have been removed;
o) 12.4: an additional subclause relating to microwave radiation has been included;
p) 14.102: the description of switching devices has been clarified;
The text of this International Standard is based on the following documents:
Draft Report on voting
65/1049/FDIS 65/1095/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 61010 series, published under the general title Safety requirements
for electrical equipment for measurement, control, and laboratory use, can be found on the IEC
website.
This document is to be used in conjunction with IEC 61010-1:2010, and
IEC 61010-1:2010/AMD1:2016.
This document supplements or modifies the corresponding clauses in IEC 61010-1 so as to
convert that publication into the IEC standard: Particular requirements for control equipment.
Where a particular subclause of IEC 61010-1 is not mentioned in this document, that subclause
applies as far as is reasonable. Where this document states "addition", "modification",
"replacement", or "deletion", the relevant requirement, test specification or note in IEC 61010-1
should be adapted accordingly.

– 6 – IEC 61010-2-201:2024 © IEC 2024
In this document,
a) the following print types are used:
– requirements and definitions: in roman type;
NOTES: in smaller roman type;
–
– conformity and tests: in italic type;
– terms used throughout this document which have been defined in Clause 3: SMALL ROMAN
CAPITALS.
b) subclauses, figures, tables and notes which are additional to those in IEC 61010-1 are
numbered starting from 101. Additional annexes are lettered starting from AA and additional
list items are lettered from aa).
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

IEC 61010-2-201:2024 © IEC 2024 – 7 –
INTRODUCTION
IEC 61010-2-2xx documents are a series of standards on the safety of industrial-process
measurement, control and automation equipment.
This document specifies the complete safety related requirements and related tests for control
equipment (e.g. programmable controller (PLC), the components of distributed control systems
(DCS), I/O devices, human machine interface (HMI)).
Safety terms of general use are defined in IEC 61010-1. More specific terms are defined in each
relevant part of the IEC 61010 series.

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SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-201: Particular requirements for control equipment

1 Scope and object
IEC 61010-1:2010, Clause 1 and IEC 61010-1:2010/AMD1:2016, Clause 1 apply, except as
follows:
1.1.1 Equipment included in scope
Replacement:
Replace the existing text with the following:
This part of IEC 61010 specifies safety requirements and related verification tests for control
equipment or their associated peripherals, or both.
Some equipment examples are:
• programmable logic controller (PLC);
• programmable automation controller (PAC);
• distributed control systems (DCS);
• industrial PC (computers) and panel PC;
• programming and debugging tools (PADTs);
• displays and human-machine interfaces (HMI);
• any product performing the function of control equipment or their associated peripherals, or
both;
• positioners; and
• control equipment which have as their intended use the command and control of machines,
automated manufacturing and industrial processes, for example discrete and continuous
control.
Components of the above named equipment and within the scope of this document are, for
example:
• (auxiliary) stand-alone power supplies;
• peripherals such as digital and analogue I/O,
• remote-I/O;
• industrial network equipment, embedded or stand-alone (e.g. switches, routers, wireless
base station).
Control equipment and their associated peripherals are intended to be used in an industrial
environment. This document considers equipment designed as OPEN or ENCLOSED EQUIPMENT.
NOTE 1 Control equipment intended also for use in other environments or for other purposes (example: for use in
building installations to control light or other electrical installations, or for use on cars, trains or ships) can have
additional conformity requirements defined by the safety standard(s) for these applications. These requirements can
involve for example: insulation, spacings and power restrictions.

IEC 61010-2-201:2024 © IEC 2024 – 9 –
NOTE 2 Computing devices and similar equipment within the scope of the IEC 60950 series or the IEC 62368 series
and conforming to their requirements are considered to be suitable for use with control equipment within the scope
of this document. However, some of the requirements of the IEC 60950 series for resistance to moisture and liquids
are less stringent, IEC 61010-1:2010, 5.4.4, second paragraph takes this aspect into account.
Control equipment covered in this document is typically intended for use in OVERVOLTAGE
CATEGORY II (IEC 60664-1) in low-voltage installations, where the RATED equipment supply
voltage does not exceed 1 000 V a.c. RMS (50/60 Hz), or 1 000 V d.c.
Where control equipment is intended for installation to supply systems with OVERVOLTAGE
CATEGORY III or IV, additional requirements are identified in Annex K.
The requirements of ISO/IEC Guide 51 and IEC Guide 104, as they relate to this part of
IEC 61010, are incorporated herein.
1.1.2 Equipment excluded from scope
Replacement:
Replace the existing text with the following:
This document does not deal with aspects of the overall automated system, for example a
complete assembly line. Control equipment (e.g. DCS and PLC), their application programme
and their associated peripherals are considered as components (components in this context are
items which perform no useful function by themselves) of an overall automated system.
Since control equipment (e.g. DCS and PLC) are component devices, safety considerations for
the overall automated system including installation and application are beyond the scope of this
document. Refer to the IEC 60364 series or applicable national and local regulations for
electrical installation and guidelines.
1.2.1 Aspects included in scope
Replace the first sentence with the following:
The purpose of the requirements of this document is to ensure that all HAZARDs to the OPERATOR,
SERVICE PERSONNEL and the surrounding area are reduced to a tolerable level.
NOTE By using the terms "OPERATOR" and "SERVICE PERSONNEL" this document considers the perception of HAZARDS
depending on training and skills. Annex AA provides a general approach in this regard.
1.2.2 Aspects excluded from scope
Replacement:
Replace the existing text with the following:
This document does not cover:
a) reliability, functionality, performance, or other properties of the control equipment not related
to safety;
b) mechanical or climatic requirements for operation, transport or storage;
c) EMC requirements (see e.g. the IEC 61326 series or IEC 61131-2);
d) protective measures for explosive atmospheres (see e.g. the IEC 60079 series);
e) functional safety (see e.g. the IEC 61508 series, IEC 61131-6).

– 10 – IEC 61010-2-201:2024 © IEC 2024
2 Normative references
IEC 61010-1:2010, Clause 2 and IEC 61010-1:2010/AMD1:2016, Clause 2 apply, except as
follows:
Addition:
Add the following new references:
IEC 60384-14, Fixed capacitors for use in electronic equipment – Part 14: Sectional
specification – Fixed capacitors for electromagnetic interference suppression and connection
to the supply mains
IEC 60695-2-11, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end products (GWEPT)
IEC 60695-11-3, Fire hazard testing – Part 11-3: Test flames – 500 W flames – Apparatus and
confirmational test methods
IEC 60695-11-20, Fire hazard testing – Part 11-20: Test flames – 500 W flame test method
IEC 60947-4-1, Low-voltage switchgear and controlgear – Part 4-1: Contactors and motor-
starters – Electromechanical contactors and motor-starters
IEC 60947-4-2, Low-voltage switchgear and controlgear – Part 4-2: Contactors and motor-
starters – Semiconductor motor controllers, starters and soft-starters
IEC 60947-5-1:2016, Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices
and switching elements – Electromechanical control circuit devices
IEC 61010-1:2010, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 1: General requirements
IEC 61010-1:2010/AMD1:2016
IEC 61010-2-030, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 2-030: Particular requirements for equipment having testing or measuring
circuits
IEC 61810-1:2015, Electromechanical elementary relays – Part 1: General and safety
requirements
3 Terms and definitions
IEC 61010-1:2010, Clause 3 applies, except as follows:
3.1.3
PORTABLE EQUIPMENT
Modification:
Replace the definition with the following:
equipment intended to be carried by hand and not fixed during NORMAL USE

IEC 61010-2-201:2024 © IEC 2024 – 11 –
3.2.3
PROTECTIVE CONDUCTOR TERMINAL
Modification:
Replace the term "PROTECTIVE CONDUCTOR TERMINAL" with "PROTECTIVE EARTH TERMINAL" and
add the following Note to entry:
Note 1 to entry: PROTECTIVE EARTH TERMINAL is most familiar to industrial users, manufacturers, etc. Therefore
since this document is targeted towards industrial use, the most familiar term is utilized.
3.2.4
ENCLOSURE
Replacement:
Replace the definition and NOTE with the following:
housing affording the type and degree of protection suitable for the intended application
[SOURCE: IEC 60050-151:2001, 151-13-08]
Add the following new terms and definitions:
3.101
AMBIENT TEMPERATURE
temperature, determined under specified conditions, of the air surrounding the equipment
3.102
ENCLOSED EQUIPMENT
equipment which includes an ENCLOSURE, having safety capability, or a combination of an
ENCLOSURE, having safety capability, and installation provisions enclosing on all sides, with the
possible exception of its mounting surface, to prevent personnel from accidentally touching
HAZARDOUS LIVE, hot or moving parts contained therein and meeting requirements of mechanical
strength, flammability, and stability (where applicable)
EXAMPLE HAND-HELD EQUIPMENT.
Note 1 to entry: This definition is related to IEC 60050-441:1984, 441-12-02.
3.103
FIELD WIRING
wiring of the control equipment, which is not installed in the control equipment manufacturer's
facility
EXAMPLE MAINS supply wiring.
3.104
INTERFACE
shared boundary between one control equipment and another control equipment, or between
parts of a control equipment, through which information or electrical energy is conveyed
[SOURCE: IEC 61131-2:2017, 3.1.21]

– 12 – IEC 61010-2-201:2024 © IEC 2024
3.105
MODULAR EQUIPMENT
equipment consisting of different modules such as a Rack, CPU, different I/O-modules, network
modules
Note 1 to entry: MODULAR EQUIPMENT can:
a) be OPEN EQUIPMENT or ENCLOSED EQUIPMENT;
b) consist of modules that cannot operate alone or of a basic module that is operational alone and can be enhanced
in function by additional modules;
c) vary in size and functionality depending on the combination and the number of modules;
d) be combined with operational equipment or enhanced in function by the addition of modules by the customer.
3.106
OPEN EQUIPMENT
equipment which does not protect personnel from accidentally touching HAZARDOUS LIVE or
moving parts contained therein nor meet requirements of mechanical strength, flammability and
stability (where applicable)
Note 1 to entry: See Annex AA.
3.107
PANEL MOUNTED EQUIPMENT
equipment where a portion of the equipment may form part of the ENCLOSURE
Note 1 to entry: See Figure 103.
3.108
PORT
access to a device or network where electromagnetic energy or signals may be supplied or
received or where the device or network variables may be observed or measured
Note 1 to entry: PORT is most commonly used with respect to EMC.
3.109
PROTECTIVE EXTRA-LOW VOLTAGE CIRCUIT
PELV CIRCUIT
protective earth referenced electrical circuit in which the voltage cannot exceed the following:
NORMAL CONDITION and SINGLE FAULT CONDITION: The a.c. voltage levels are 30 V RMS, 42,4 V
peak and the d.c. voltage level is 60 V. For equipment intended for use in WET LOCATIONS, the
a.c. voltage levels are 16 V RMS, 22,6 V peak and the d.c. voltage level is 35 V
Note 1 to entry: Transients are not taken into consideration in PELV CIRCUITS.
[SOURCE: IEC 60050-195:2021, 195-06-29, modified – In the preferred term, "system" has
been replaced with "circuit", a full description and clarifications have been added and the Note
to entry has been replaced with a new Note to entry.]
3.110
SAFETY EXTRA-LOW VOLTAGE CIRCUIT
SELV CIRCUIT
non-protective earth referenced electrical circuit in which the voltage cannot exceed the
following:
NORMAL CONDITION and SINGLE FAULT CONDITION: The a.c. voltage levels are 30 V RMS, 42,4 V
peak and the d.c. voltage level is 60 V. For equipment intended for use in WET LOCATIONS, the
a.c. voltage levels are 16 V RMS, 22,6 V peak and the d.c. voltage level is 35 V
Note 1 to entry: Transients are not taken into consideration in SELV CIRCUITS.

IEC 61010-2-201:2024 © IEC 2024 – 13 –
[SOURCE: IEC 60050-195:2021, 195-06-28, modified – In the preferred term, "system" has
been replaced with "circuit", a full description and clarifications have been added and the Note
to entry has been replaced with a new Note to entry.]
3.111
SERVICE PERSONNEL
person who is installing, changing or repairing the control equipment, with the appropriate
technical training, experience and awareness of HAZARDS and of measures to minimize danger
to themselves, other persons or to the control equipment, in an industrial environment
Note 1 to entry: SERVICE PERSONNEL are persons having the appropriate technical training and experience
necessary to be aware of HAZARDS – e.g. electrical HAZARDS, temperature HAZARDS, fire HAZARDS – to which they are
exposed in performing a task and of measures to minimize danger to themselves or to other persons or to the control
equipment, in an industrial environment.
Note 2 to entry: SERVICE PERSONNEL change or repair control equipment e.g. hardware configuration or installation
of software updates provided by the manufacturer.
Note 3 to entry: See AA.1.3 for more detail.
4 Tests
IEC 61010-1:2010, Clause 4 and IEC 61010-1:2010/AMD1:2016, Clause 4 apply, except as
follows:
4.1 General
Add the following three paragraphs of requirements after the third paragraph of requirements,
before the first conformity statement:
The product is verified in accordance with this document in a documented test configuration,
which represents the least favourable configuration. See 4.3.
It is likely or possible that there are different test configurations which yield least favourable
test conditions. For example there can be a least favourable configuration for the temperature
test, and a different least favourable test configuration for the voltage test. If this is the case
then the appropriate least favourable test configuration(s) shall be used with regard to 4.3.2
and 4.4.
These least favourable test configurations and test conditions shall be practical and useful for
the intended applications.
Add the following conformity statement at the end of the list of conformity statements:
Conformity verification: The selected test configuration(s) and test conditions shall be
documented with the rationale in the test report.
4.4.1 General
Add the following note to item a):
NOTE A fault condition can include open or short circuit of components, as well as disabling or bridging one means
or layer of protection.
– 14 – IEC 61010-2-201:2024 © IEC 2024
4.4.4.3 Spread of fire
Add the following to the conformity statement:
Optionally, for OPEN EQUIPMENT:
The equipment may be placed inside a wire mesh cage covered with cheesecloth. The wire
mesh cage shall be maximum 1,5 times the size (length, width, height) of the device or
representative system including the device, to simulate the intended ENCLOSURE during the
single fault condition testing. See 10.4.1.101 for representative system methodology.with a
tolerance of
The wire mesh cage shall be a metal screen with a mesh 25 mm × 25 mm with a tolerance of
5 mm, centre to centre with a wire diameter of 0,8 mm ± 0,3 mm.
NOTE 1 The wire mesh used is commonly known as chicken wire, 25 mm hexagonal mesh weave made of 0,81
gauge wire.
Cheesecloth is a bleached cotton cloth of approximately 40 g/m containing no flame retardants.
NOTE 2 Cheesecloth is a coarse, loosely woven cotton gauze, originally used for wrapping cheese.
NOTE 3 Panel mounted equipment can combine the two methods.
5 Marking and documentation
IEC 61010-1:2010, Clause 5 and IEC 61010-1:2010/AMD1:2016, Clause 5 apply, except as
follows:
5.1.3 M
...