SIST EN IEC 60601-2-57:2026

SLOVENSKI STANDARD
01-marec-2026
Nadomešča:
SIST EN 60601-2-57:2011
Medicinska električna oprema - 2-57. del: Posebne zahteve za osnovno varnost in
bistvene lastnosti opreme z nelaserskim svetlobnim virom, namenjene za
terapevtsko, diagnostično, nadzorno in kozmetično/estetsko uporabo
Medical electrical equipment - Part 2-57: Particular requirements for the basic safety and
essential performance of non-laser light source equipment intended for therapeutic,
diagnostic, monitoring and cosmetic/aesthetic use
Medizinische elektrische Geräte - Teil 2-57: Besondere Festlegungen für die Sicherheit
einschließlich der wesentlichen Leistungsmerkmale von Geräten mit Nicht-Laser-
Lichtquellen für die Anwendung in der Therapie, Diagnose, Überwachung und für
kosmetische/ästhetische Zwecke
Appareils électromédicaux - Partie 2-57: Exigences particulières pour la sécurité de base
et les performances essentielles des appareils à source de lumière non-laser prévus
pour des utilisations thérapeutiques, de diagnostic, de surveillance et de
cosmétique/esthétique
Ta slovenski standard je istoveten z: EN IEC 60601-2-57:2026
ICS:
11.040.55 Diagnostična oprema Diagnostic equipment
11.040.60 Terapevtska oprema Therapy equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60601-2-57

NORME EUROPÉENNE
EUROPÄISCHE NORM January 2026
ICS 11.040.50; 11.040.60 Supersedes EN 60601-2-57:2011
English Version
Medical electrical equipment - Part 2-57: Particular requirements
for the basic safety and essential performance of non-laser light
source equipment intended for therapeutic, diagnostic,
monitoring, cosmetic and aesthetic use
(IEC 60601-2-57:2023)
Appareils électromédicaux - Partie 2-57: Exigences Medizinische elektrische Geräte - Teil 2-57: Besondere
particulières pour la sécurité de base et les performances Festlegungen für die Sicherheit einschließlich der
essentielles des appareils à source de lumière non laser wesentlichen Leistungsmerkmale von Geräten mit Nicht-
destinés à des usages thérapeutiques, de diagnostic, de Laser-Lichtquellen für die Anwendung in der Therapie,
surveillance, cosmétiques et esthétiques Diagnose, Überwachung und für kosmetische/ästhetische
(IEC 60601-2-57:2023) Zwecke
(IEC 60601-2-57:2023)
This European Standard was approved by CENELEC on 2025-12-17. 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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60601-2-57:2026 E

European foreword
The text of document 76/734/FDIS, future edition 2 of IEC 60601-2-57, prepared by TC 76 "Optical
radiation safety and laser equipment" was submitted to the IEC-CENELEC parallel vote and approved
by CENELEC as EN IEC 60601-2-57:2026.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-01-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-01-31
document have to be withdrawn
This document supersedes EN 60601-2-57:2011 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.
This document has been prepared under a standardization request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
For the relationship with EU Legislation, see informative Annex ZZ, which is an integral part of
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 60601-2-57:2023 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 60335-2-113 NOTE Approved as EN IEC 60335-2-113
IEC 60335-2-27 NOTE Approved as EN 60335-2-27
IEC 60601-2-83:2019 NOTE Approved as EN IEC 60601-2-83:2020 (not modified) + A11:2021

IEC 60601-2-57 ®
Edition 2.0 2023-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Medical electrical equipment –

Part 2-57: Particular requirements for the basic safety and essential

performance of non-laser light source equipment intended for therapeutic,

diagnostic, monitoring, cosmetic and aesthetic use

Appareils électromédicaux –
Partie 2-57: Exigences particulières pour la sécurité de base et les

performances essentielles des appareils à source de lumière non laser destinés

à des usages thérapeutiques, de diagnostic, de surveillance, cosmétiques et

esthétiques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 11.040.50, 11.040.60 ISBN 978-2-8322-7296-1

– 2 – IEC 60601-2-57:2023 © IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 6
201.1 Scope, object and related standards . 7
201.2 Normative references . 9
201.3 Terms and definitions . 9
201.4 General requirements . 12
201.5 General requirements for testing ME EQUIPMENT . 13
201.6 Classification of ME EQUIPMENT and ME SYSTEMS . 13
201.7 ME EQUIPMENT identification, marking and documents . 13
201.8 Protection against electrical HAZARDS from ME EQUIPMENT . 17
201.9 Protection against MECHANICAL HAZARDS of ME EQUIPMENT and ME SYSTEMS . 18
201.10 Protection against unwanted and excessive radiation HAZARDS . 18
201.11 Protection against excessive temperatures and other HAZARDS . 21
201.12 Accuracy of controls and instruments and protection against HAZARDOUS
outputs . 21
201.13 HAZARDOUS SITUATIONS and fault conditions for ME EQUIPMENT . 22
201.14 PROGRAMMABLE ELECTRICAL MEDICAL SYSTEMS (PEMS) . 22
201.15 Construction of ME EQUIPMENT . 22
201.16 ME SYSTEMS . 22
201.17 Electromagnetic compatibility of ME EQUIPMENT and ME SYSTEMS . 22
Annexes . 23
Annex AA (informative) Particular guidance and rationale . 24
Annex BB (informative) Summary of MANUFACTURER’S requirements . 26
Annex CC (informative) Symbols on marking . 27
Bibliography . 28
Index of defined terms used in this document . 29

Figure 201.101 – Example of explanatory label for a device with multiple hazard
spectral regions . 14
Figure 201.102 – Example of explanatory label . 14
Figure 201.103 – Reproduction of the OPTICAL RADIATION warning symbol
(ISO 7010:W027:2011-05) . 15

Table 201.104 – Requirements for marking of LS EQUIPMENT according to risk group
classification . 14
Table BB.1 – Summary of MANUFACTURER’s requirements . 26
Table CC.1 – Symbols, references and descriptions . 27

IEC 60601-2-57:2023 © IEC 2023 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MEDICAL ELECTRICAL EQUIPMENT –

Part 2-57: Particular requirements for the basic safety and essential
performance of non‑laser light source equipment intended for therapeutic,
diagnostic, monitoring, cosmetic and aesthetic use

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 60601-2-57 has been prepared by IEC technical committee 76: Optical radiation safety and
laser equipment. It is an International Standard.
This second edition cancels and replaces the first edition published in 2011. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) This edition constitutes a major review of the previous edition and covers the recent
development of LS EQUIPMENT. It now includes the RISK GROUP 1C (RG-1C). LS EQUIPMENT
of RG-1C incorporates technical means which inhibit emission into free space when the
APPLICATOR is not in GOOD CONTACT with the target tissue.

– 4 – IEC 60601-2-57:2023 © IEC 2023
b) It now excludes LS EQUIPMENT of RG-1 and RG-2 as these are assumed to represent no
hazard. RG-1C is only included if the incorporated light source is of RG-3.
c) It clarifies its relation to the concept of Risk Groups (RGs), as introduced in IEC 62471.
d) Although the previous edition was applicable to LS EQUIPMENT containing UV sources, more
emphasis is given to UV applications of the equipment in this edition.
e) This edition excludes LS EQUIPMENT which is intended to be used on animals.
The text of this International Standard is based on the following documents:
Draft Report on voting
76/734/FDIS 76/737/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/publications.
In this document, the following print types are used:
– Requirements and definitions: roman type.
– Test specifications: italic type.
– Informative material appearing outside of tables, such as notes, examples and references:
in smaller type. Normative text of tables is also in a smaller type.
– Terms defined in Clause 3 of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601-1:2005/AMD2:2020, in this document or as noted: SMALL CAPITALS.
In referring to the structure of this document, the term
– "clause" means one of the seventeen numbered divisions within the table of contents,
inclusive of all subdivisions (e.g. Clause 7 includes subclauses 7.1, 7.2, etc.);
– "subclause" means a numbered subdivision of a clause (e.g. 7.1, 7.2 and 7.2.1 are all
subclauses of Clause 7).
References to clauses within this document are preceded by the term "Clause" followed by the
clause number. References to subclauses within this document are by number only.
In this document, the conjunctive "or" is used as an "inclusive or" so a statement is true if any
combination of the conditions is true.
The verbal forms used in this document conform to usage described in Clause 7 of the
ISO/IEC Directives, Part 2:2021. For the purposes of this document, the auxiliary verb:
– "shall" means that compliance with a requirement or a test is mandatory for compliance with
this document;
– "should" means that compliance with a requirement or a test is recommended but is not
mandatory for compliance with this document;
– "may" is used to describe a permissible way to achieve compliance with a requirement or
test.
IEC 60601-2-57:2023 © IEC 2023 – 5 –
An asterisk (*) as the first character of a title or at the beginning of a paragraph or table title
indicates that there is guidance or rationale related to that item in Annex AA.
A list of all parts of the IEC 60601 series, published under the general title: Medical electrical
equipment, can be found on the IEC website.
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,
• replaced by a revised edition, or
• amended.
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.

– 6 – IEC 60601-2-57:2023 © IEC 2023
INTRODUCTION
This document amends and supplements IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012
and IEC 60601-1:2005/AMD2:2020, Medical electrical equipment – Part 1: General
requirements for basic safety and essential performance.
The requirements of this document should be taken as the minimum to comply with, in order to
achieve a reasonable level of safety and reliability during operation and application of non-laser
light source equipment intended for therapeutic, diagnostic, monitoring and cosmetic or
aesthetic use.
An asterisk (*) notes clauses for which there is rationale comment in Annex AA. It is considered
that knowledge of the reasons for these requirements will facilitate the proper application of this
document and be of use in any revision that may be necessitated by changes in clinical practice
or as a result of developments in technology.

IEC 60601-2-57:2023 © IEC 2023 – 7 –
MEDICAL ELECTRICAL EQUIPMENT –

Part 2-57: Particular requirements for the basic safety and essential
performance of non‑laser light source equipment intended for therapeutic,
diagnostic, monitoring, cosmetic and aesthetic use

201.1 Scope, object and related standards
Clause 1 of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601-1:2005/AMD2:2020 applies, except as follows:
201.1.1 *Scope
Replacement:
This part of IEC 60601-2 applies to BASIC SAFETY and ESSENTIAL PERFORMANCE of equipment
incorporating one or more sources of OPTICAL RADIATION in the wavelength range 200 nm to
3 000 nm, with the exception of laser radiation, and intended to create photobiological effects
in humans for therapeutic, diagnostic, monitoring, and cosmetic or aesthetic applications;
hereafter referred to as light source equipment (LS EQUIPMENT).
This document applies to LS EQUIPMENT of RISK GROUP 1C if the incorporated source of OPTICAL
RADIATION is of RG-3, and of Risk Group 3.
NOTE 1 For classification rules for Risk Groups, see 201.6.1.102.
This document does not apply to equipment for sun tanning such as sunlamp products, for
ophthalmic instruments, for lighting purposes in medical or cosmetic environments, for
photography/video, for equipment which produces visual or non-visual effects such as circadian
entrainment, or for infant phototherapy and infant radiant warmers. This document does not
apply to sterilization equipment.
This document does not apply to home-use appliances. It does not apply to home light therapy
equipment, such as equipment which is intended to be used in the HOME HEALTHCARE
ENVIRONMENT and is typically used by a LAY OPERATOR.
NOTE 2 Home-use appliances are covered by IEC 60335-2-113:2016 [1] . Appliances for skin exposure to OPTICAL
RADIATION, such as sunlamp products, are covered by IEC 60335-2-27 [2]. Home light therapy equipment providing
light therapy by means of eye-mediated photobiological effects, which can be visual or non-visual, and skin-mediated
photobiological effects, possible applications including pain relief, psoriasis treatment, and treatment of winter
depression (SAD), are also covered by IEC 60601-2-83:2019 [3].
NOTE 3 Safety requirements in this document are intended to address only HAZARDS to the eye and superficial
tissues including skin or mucosa. As OPTICAL RADIATION does not penetrate more than a few millimetres in tissue,
HAZARDS to underlying tissues are not considered.
___________
Numbers in square brackets refer to the Bibliography.

– 8 – IEC 60601-2-57:2023 © IEC 2023
201.1.2 Object
Replacement:
The objects of this document are:
– to establish the risk from OPTICAL RADIATION, specify basic safety and essential performance
requirements for LS EQUIPMENT;
– to specify requirements for the MANUFACTURER to supply information and establish
procedures so that proper precautions can be adopted;
– to provide warning to individuals of risks associated with accessible OPTICAL RADIATION from
LS EQUIPMENT through signs, labels and instructions;
– to reduce the possibility of adverse effects and injuries by minimizing unnecessary
accessible OPTICAL RADIATION; to provide means of improved control of the HAZARDS related
to OPTICAL RADIATION through engineering controls;
– to specify requirements for protection against other HAZARDS resulting from the operation
and use of LS EQUIPMENT.
201.1.3 Collateral standards
Addition:
This document refers to the applicable collateral standards that are listed in Clause 2 of
IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020.
All collateral standards apply, except IEC 60601-1-11.
201.1.4 Particular standards
Replacement:
In the IEC 60601 series, particular standards may modify, replace or delete requirements
contained in IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601 1:2005/AMD2:2020 and collateral standards as appropriate for the particular
ME EQUIPMENT under consideration, and may add other basic safety and essential performance
requirements.
A requirement of a particular standard takes priority over IEC 60601-1:2005,
IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020.
The numbering of clauses and subclauses of this document corresponds to that of
IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020 with the
prefix "201" (e.g. 201.1 in this document addresses the content of Clause 1 of
IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020) or
applicable collateral standard with the prefix "20x" where x is the final digit(s) of the collateral
standard document number (e.g. 202.4 in this document addresses the content of Clause 4 of
the IEC 60601-1-2 collateral standard, 203.4 in this document addresses the content of Clause
4 of the IEC 60601-1-3 collateral standard, etc.). The changes to the text of IEC 60601-1:2005,
IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020 are specified by the use of
the following words:
"Replacement" means that the clause or subclause of IEC 60601-1:2005,
IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020 or applicable collateral
standard is replaced completely by the text of this document.
"Addition" means that the text of this document is additional to the requirements of
IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020 or
applicable collateral standard.

IEC 60601-2-57:2023 © IEC 2023 – 9 –
"Amendment" means that the clause or subclause of IEC 60601-1:2005,
IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020 or applicable collateral
standard is amended as indicated by the text of this document.
Subclauses, figures or tables which are additional to those of IEC 60601-1:2005,
IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020 are numbered starting from
201.101. However, due to the fact that definitions in IEC 60601-1:2005,
IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020 are numbered 3.1 through
3.139, additional definitions in this document are numbered beginning from 201.3.201.
Additional annexes are lettered AA, BB, etc., and additional items aa), bb), etc.
Subclauses, figures or tables which are additional to those of a collateral standard are
numbered starting from 20x, where "x" is the final digit(s) of the collateral standard document
number, e.g. 202 for IEC 60601-1-2, 203 for IEC 60601-1-3, etc.
The term "this standard" is used to make reference to IEC 60601-1:2005,
IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020, any applicable collateral
standards and this document taken together.
Where there is no corresponding clause or subclause in this document, the clause or subclause
of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and IEC 60601-1:2005/AMD2:2020 or
applicable collateral standard, although possibly not relevant, applies without modification;
where it is intended that any part of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601-1:2005/AMD2:2020 or applicable collateral standard, although possibly relevant, is
not to be applied, a statement to that effect is given in this document.
201.2 Normative references
NOTE Informative references are listed in the Bibliography.
Clause 2 of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601-1:2005/AMD2:2020 applies, except as follows:
Addition:
IEC 60947-3, Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors,
switch-disconnectors and fuse-combination units
IEC 62471, Photobiological safety of lamps and lamp systems
ISO 3864-2, Graphical symbols – Safety colours and safety signs – Part 2: Design principles
for product safety labels
201.3 Terms and definitions
Clause 3 of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601-1:2005/AMD2:2020 applies, except as follows:
Replacement:
201.3.18
CONTINUOUS OPERATION
operation with a continuous OPTICAL RADIATION output for a duration equal to or greater than
0,25 s for wavelengths in the range 400 nm to 700 nm and 10 s for all other wavelengths

– 10 – IEC 60601-2-57:2023 © IEC 2023
201.3.73
OPERATOR
person handling the LS EQUIPMENT
Note 1 to entry: In general, the OPERATOR controls the delivery of optical radiation. The OPERATOR can appoint one
or more other persons who assist with the selection and/or setting of the parameters. The more general term "user"
is interpreted in its generic meaning. The meaning of "user" may include the definition of "OPERATOR".
201.3.76
PATIENT
person undergoing the treatment or diagnostic procedure
Addition:
201.3.201
APPLICATOR
mechanical or optical means of transferring OPTICAL RADIATION from the source to the human
tissue
201.3.202
EMERGENCY STOP
device intended to stop the LS EQUIPMENT OUTPUT immediately in case of emergency
201.3.203
EMISSION APERTURE
opening or window through which the OPTICAL RADIATION is emitted
201.3.204
EXPOSURE DURATION
duration of a PULSE, or series, or train of PULSES or of continuous emission of OPTICAL RADIATION
LS EQUIPMENT
incident upon the human body during operation, maintenance or servicing of
Note 1 to entry: For a single PULSE, this is the duration between the half-peak power point of the leading edge and
the corresponding point on the trailing edge. For a train of PULSES (or subsections of a train of PULSES), this is the
duration between the first half-peak power point of the leading PULSE and the last half-peak power point of the last
PULSE.
Note 2 to entry: EXPOSURE DURATION is measured in seconds (s).
201.3.205
GOOD CONTACT
state that is established when the APPLICATOR of the LS EQUIPMENT which is classified RG-1C is
positioned at the target tissue so as to effectively prevent HAZARDOUS eye exposure to STRAY
OPTICAL RADIATION
201.3.206
LS EQUIPMENT
ME EQUIPMENT which incorporates one or more sources of OPTICAL RADIATION in the wavelength
range 200 nm to 3 000 nm, with the exception of laser radiation, and which is intended to create
photobiological effects for therapeutic, diagnostic, monitoring, and cosmetic or aesthetic
applications
201.3.207
LS EQUIPMENT OUTPUT
radiant power, radiant energy, irradiance or radiant exposure emitted by and as relevant to the
LS EQUIPMENT
IEC 60601-2-57:2023 © IEC 2023 – 11 –
201.3.208
OCULAR EXPOSURE LIMIT
maximum level of exposure to the eye that is not expected to result in adverse biological effects
Note 1 to entry: OCULAR EXPOSURE LIMITS can be found in ICNIRP Guidelines:
https://www.icnirp.org/cms/upload/publications/ICNIRPVisible_Infrared2013.pdf [4]
https://www.icnirp.org/cms/upload/publications/ICNIRPUV2004.pdf [5].
201.3.209
OCULAR HAZARD DISTANCE
OHD
shortest distance from an EMISSION APERTURE at which the projected radiant exposure or
irradiance for a given EXPOSURE DURATION equals the applicable OCULAR EXPOSURE LIMIT
Note 1 to entry: OCULAR HAZARD DISTANCE is measured in metres (m).
201.3.210
OPTICAL RADIATION
electromagnetic radiation with wavelengths between 100 nm and 1 mm
201.3.211
PULSE
PULSED
emission with the duration shorter than 0,25 s in the range 400 nm to 700 nm and shorter than
10 s at all other wavelengths
201.3.212
PULSE DURATION
time increment measured between the half-peak (50 %) power points at the leading and trailing
edges of a PULSE
Note 1 to entry: PULSE DURATION is measured in seconds (s).
201.3.213
PULSE INTERVAL
time between the end of one PULSE and the onset of the following PULSE, measured at the 50 %
trailing and leading edges, respectively
Note 1 to entry: PULSE INTERVAL is measured in seconds (s).
201.3.214
PULSE TRAIN
series of PULSES where the total on time of the PULSES in any series of PULSES in any single
exposure sequence does not exceed 0,25 s for wavelengths in the range 400 nm to 700 nm and
does not exceed 10 s for all other wavelengths
201.3.215
READY
condition in which the LS EQUIPMENT is capable of emitting OPTICAL RADIATION and emission
takes place when the control switch is activated
201.3.216
READY INDICATOR
visible or audible signal that indicates when LS EQUIPMENT is in the READY condition
Note 1 to entry: The purpose of the READY INDICATOR is to make all persons present in the vicinity aware of the need
to take precautions against HAZARDOUS OPTICAL RADIATION.

– 12 – IEC 60601-2-57:2023 © IEC 2023
201.3.217
RISK GROUP 1C
RG-1C
classification of LS EQUIPMENT that contains a source of up to Risk Group 3, that is used in
contact with the skin, and that has engineering controls which contain the optical radiation so
that any leakage does not exceed RG-1 in any of the hazard spectral regions, when assessed
at 0,5 m from the APPLICATOR
201.3.218
SET VALUE
intended LS EQUIPMENT OUTPUT incident on the TREATMENT AREA, as set by the OPERATOR
201.3.219
STAND-BY
condition in which the power supply (SUPPLY MAINS or battery) is connected, and the SUPPLY
MAINS switch activated, and the LS EQUIPMENT is not capable of emitting the OPTICAL RADIATION
even if the control switch is activated
201.3.220
STRAY OPTICAL RADIATION
OPTICAL RADIATION that is unintentionally emitted from the EMISSION APERTURE or from the target
tissue, including scattered, reflected and leakage radiation
201.3.221
TREATMENT AREA
extent of the field over which the OPTICAL RADIATION is intended to produce a therapeutic
response
Note 1 to entry: For LS EQUIPMENT where OPTICAL RADIATION exposure is carried out in contact with the surface to
be treated, this is equivalent to the device aperture.
201.3.222
ULTRAVIOLET
UV
OPTICAL RADIATION having wavelengths between 100 nm and 400 nm
Note 1 to entry: For ULTRAVIOLET (UV) radiation, the range between 100 nm and 400 nm is commonly subdivided
into: UV-A, from 315 nm to 400 nm; UV-B, from 280 nm to 315 nm; and UV-C, from 100 nm to 280 nm. These
designations for the UV are not precise limits, particularly for photobiological effects. In some fields of photobiology
the wavelength bands are taken from 200 nm to 290 nm, from 290 nm to 320 nm, and from 320 nm to 400 nm.
Sometimes these are (incorrectly) called by the names UV-A, UV-B and UV-C, respectively.
201.3.223
VISIBLE
VIS
OPTICAL RADIATION having wavelengths between 380 nm and 780 nm
Note 1 to entry: There are no precise limits for the spectral range of VISIBLE radiation since they depend on the
amount of radiant power reaching the retina and the responsivity of the observer, The lower limit is generally taken
between 360 and 400 nm and the upper limit between 760 and 830 nm.
201.4 General requirements
Clause 4 of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601-1:2005/AMD2:2020 applies.
The requirements for manufacturers are summarized in Annex BB.

IEC 60601-2-57:2023 © IEC 2023 – 13 –
201.5 General requirements for testing ME EQUIPMENT
Clause 5 of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601-1:2005/AMD2:2020 applies.
201.6 Classification of ME EQUIPMENT and ME SYSTEMS
Clause 6 of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601-1:2005/AMD2:2020 applies, except as follows:
201.6.1 General
Addition:
201.6.1.101 Classification responsibilities
The LS EQUIPMENT shall be classified by the manufacturer according to the classification rules
as defined in IEC 62471, if the Risk Group is not 1C.
201.6.1.102 Classification rules
LS EQUIPMENT is different from lamps used in general lighting, as the radiation is used for
treatment or diagnosis purposes on humans rather than general exposure purposes such as
general lighting, illumination or disinfection. To be able to attribute a Risk Group to LS EQUIPMENT,
its handpieces, APPLICATORS or its incorporated freely emitting sources shall be considered as
"lamps" as covered by IEC 62471.
201.7 ME EQUIPMENT identification, marking and documents
Clause 7 of IEC 60601-1:2005, IEC 60601-1:2005/AMD1:2012 and
IEC 60601-1:2005/AMD2:2020 applies, except as follows:
201.7.2 Marking on the outside of ME EQUIPMENT or ME EQUIPMENT parts
Addition:
201.7.2.101 Labels and marking of LS EQUIPMENT
201.7.2.101.1 Specification of labels and marking
The MANUFACTURER of LS EQUIPMENT shall provide risk group marking. The label shall include
the designated risk group and wording according to Table 201.104.
Wording that conveys an equivalent meaning is acceptable.

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Table 201.104 – Requirements for marking of LS EQUIPMENT
according to risk group classification
HAZARD RISK GROUP 1C Risk Group 3
WARNING
Actinic UV CAUTION
UV emitted from this device may be hazardous
180 nm to 400 nm UV emitted from this device
Avoid non-intended skin exposure and avoid eye
exposure
WARNING
Near UV CAUTION
UV emitted from this device may be hazardous
315 nm to 400 nm UV emitted from this device
Avoid eye exposure
Blue-light
Not required
WARNING
300 nm to 700 nm
The light emitted may result in eye injury
Retinal thermal
Not applicable Do not look at the light source
380 nm to 1 400 nm
Retinal thermal,
Not applicable WARNING
weak visual stimulus
IR emitted from this device may cause eye injury
Corneal and lens IR CAUTION
Avoid eye exposure
> 780 nm IR emitted from this device

When LS EQUIPMENT emits OPTICAL RADIATION in more than one hazard spectral region, it shall
be classified for the most restrictive case. If the OPTICAL RADIATION in other spectral regions
exceeds the EMISSION LIMITS for the Exempt Group, appropriate warning shall be included in the
product explanatory label. See IEC 62471 for the emission limits of the Exempt Group and for
the hazard spectral regions.
RISK GROUP 3
WARNING IR emitted from this device may cause eye injury.
Avoid eye exposure
CAUTION UV emitted from this device. Eye irritation may result

Figure 201.101 – Example of explanatory label for a device
with multiple hazard spectral regions

RISK GROUP 1C
CAUTION Optical radiation – follow instructions

Figure 201.102 – Example of explanatory label

IEC 60601-2-57:2023 © IEC 2023 – 15 –
201.7.2.101.2 Product label design and labelling information
LS EQUIPMENT shall carry an explanatory label (Figure 201.101 for RG-3, or Figure 201.102 for
RG-1C) and the OPTICAL RADIATION warning symbol, as defined in ISO 7010:W027:2011-05
(Figure 201.103) in accordance with the requirements of this standard and ISO 3864-2. The
labels shall be durable, permanently affixed, legible, and clearly visible during operation,
maintenance or service, according to their purpose. They shall be positioned so that they can
be read without the necessity for human exposure to OPTICAL RADIATION emitted from this
equipment. Text borders and symbols shall be black on a yellow background.
If the size or design of the LS EQUIPMENT makes labelling impractical, the label shall be included
with the user information or on the package.
Direct printing or engraving of equivalent labels on the LS EQUIPMENT or panels is acceptable.
The explanatory label may be of any size necessary to contain the required lettering and border.
The minimum width of each border dimension should be 0,06 times the length of the shorter
side of the label.
Figure 201.103 – Reproduction of the OPTICAL RADIATION warning symbol
(ISO 7010:W027:2011-05)
201.7.2.101.3 EMISSION APERTURE label
LS EQUIPMENT classified RG-1C, and RG-3 shall have a label affixed close to each EMISSION
APERTURE. The label(s) shall bear the words:
OPTICAL RADIATION APERTURE
or
APERTURE FOR OPTICAL RADIATION
or (for RG-3 only)
AVOID EYE EXPOSURE – OPTICAL RADIATION IS EMITTED FROM THIS
APERTURE
– 16 – IEC 60601-2-57:2023 © IEC 2023
201.7.2.101.4 Radiation output and standards information
The name and publication date of the standard to which the product is classified shall be
included on the explanatory label or elsewhere near to the product. Each LS EQUIPMENT shall
be described on the explanatory label by a statement of the maximum output of OPTICAL
RADIATION, the PULSE DURATION range (if appropriate) and the emitted wavelength range.
201.7.9 Accompanying documents
201.7.9.1 General
Addition:
MANUFACTURERS of LS EQUIPMENT shall provide instructions for proper operation, including clear
warnings concerning precautions to avoid possible exposure to HAZARDOUS OPTICAL RADIATION.
201.7.9.2 Instructions for use
201.7.9.2.13 Maintenance
Addition:
MANUFACTURERS of LS EQUIPMENT shall provide instructions for maintenance including warnings
concerning precautions to avoid possible exposure to HAZARDOUS OPTICAL RADIATION.
201.7.9.2.17 ME EQUIPMENT emitting radiation
Addition:
201.7.9.2.17.101 Specific information for LS EQUIPMENT
201.7.9.2.17.101.1 Information on output
The MANUFACTURER of LS EQUIPMENT shall provide the following information:
– spectral irradiance or spectral radiant exposure measured at the TREATMENT AREA for all
intended configurations of LS EQUIPMENT;
– maximum LS EQUIPMENT OUTPUT for all intended configurations of LS EQUIPMENT, measured
at the TREATMENT AREA. If the LS EQUIPMENT is designed for providing treatment in different
TREATMENT AREAS, these parameters shall be specified for each of the TREATMENT AREAS;
– maximum variation of the LS EQUIPMENT OUTPUT from the mean value across the TREATMENT
AREA for all intended configurations of the LS EQUIPMENT;
– OCULAR HAZARD DISTANCE when the LS EQUIPMENT is classified Risk Group 3.
For PULSED LS EQUIPMENT, for all intended operational SET VALUES of the equipment, the
MANUFACTURER shall provide an additional statement of:
– PULSE DURATION of individual PULSES;
– duration of a PULSE TRAIN;
– PULSE INTERVAL;
– PULSE repetition rate;
– number of PULSES in a PULSE TRAIN.

IEC 60601-2-57:2023 © IEC 2023 – 17 –
201.7.9.2.17.101.2 Safety information
MANUFACTURERS of LS EQUIPMENT shall provide the following information in the user instructions,
if applicable:
– instructions for installation, maintenance, pre-use checks and safe use, including clear
warnings concerning precautions to avoid possible exposure to HAZARDOUS radiation or risk
of fire;
– description of the procedures of the intended use, indications, pre-treatment evaluations,
counter-indications. When the LS EQUIPMENT emits UV-A, UV-B or UV-C, warning about the
risks that PATIENTS will suffer from future potential carcinogenic occurrences.
– recommendations for training;
– legible reproductions (colour optional) of all required labels and HAZARD warnings affixed to
the LS EQUIPMENT;
– a clear indication of all locations of EMISSION APERTURES;
– a list of controls, adjustments and procedures for operation and maintenance, including the
warning "Caution –
...