CLC IEC/TS 60079-47:2021

SLOVENSKI STANDARD
01-december-2021
Eksplozivne atmosfere - 47. del: Zaščita opreme z lastnovarnim dvožičnim
konceptom Ethernet (2-WISE)
Explosive atmospheres - Part 47: Equipment protection by 2-wire intrinsically safe
Ethernet concept (2-WISE)
Explosionsgefährdete Bereiche - Teil 47: Geräteschutz durch eigensicheres 2-Draht-
Ethernet-Konzept (2-WISE)
Atmosphères explosives - Partie 47: Protection du matériel par le concept Ethernet de
sécurité intrinsèque à 2 fils (2-WISE)
Ta slovenski standard je istoveten z: CLC IEC/TS 60079-47:2021
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION CLC IEC/TS 60079-47

SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
July 2021
ICS 29.260.20
English Version
Explosive atmospheres - Part 47: Equipment protection by 2-
wire intrinsically safe Ethernet concept (2-WISE)
(IEC/TS 60079-47:2021)
Atmosphères explosives - Partie 47: Protection du matériel Explosionsgefährdete Bereiche - Teil 47: Geräteschutz
par le concept Ethernet de sécurité intrinsèque à 2 fils (2- durch eigensicheres 2-Draht-Ethernet-Konzept (2-WISE)
WISE) (IEC/TS 60079-47:2021)
(IEC/TS 60079-47:2021)
This Technical Specification was approved by CENELEC on 2021-07-05.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force.

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,
Turkey 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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC IEC/TS 60079-47:2021 E

European foreword
This document (CLC IEC/TS 60079-47:2021) consists of the text of IEC/TS 60079-47:2021 prepared
by IEC/TC 31 "Equipment for explosive atmospheres".
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 Technical Specification IEC/TS 60079-47:2021 was approved by
CENELEC as a European Technical Specification without any modification.
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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60079-0 -  Explosive atmospheres - Part 0: EN IEC 60079-0 -
Equipment - General requirements
IEC 60079-11 -  Explosive atmospheres - Part 11: EN 60079-11 -
Equipment protection by intrinsic safety "i"
IEC 60079-14 -  Explosive atmospheres - Part 14: Electrical EN 60079-14 -
installations design, selection and erection
IEC 60079-25 -  Explosive atmospheres - Part 25: EN 60079-25 -
Intrinsically safe electrical systems

IEC TS 60079-47 ®
Edition 1.0 2021-02
TECHNICAL
SPECIFICATION
Explosive atmospheres –
Part 47: Equipment protection by 2-wire intrinsically safe Ethernet concept

(2-WISE)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.260.20 ISBN 978-2-8322-9317-1

– 2 – IEC TS 60079-47:2021  IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements for 2-WISE devices . 6
4.1 General . 6
4.2 2-WISE power source ports . 7
4.3 2-WISE power load ports and 2-WISE auxiliary device ports . 7
4.4 2-WISE communication only ports . 8
4.5 Simple apparatus . 8
5 Requirements for 2-WISE systems . 8
5.1 General . 8
5.2 Wiring systems . 9
5.3 Powered 2-WISE systems . 9
5.4 Communication only 2-WISE systems . 9
5.5 Descriptive system document . 10
6 Schedule drawings and instructions for 2-WISE devices . 10
7 Marking . 11
7.1 General . 11
7.2 Examples of marking . 11
Bibliography . 14

Figure 1 – DC-powered 2-WISE system . 9
Figure 2 – Communication only 2-WISE system . 10

Table 1 – Intrinsically safe parameters for 2-WISE Power load ports and auxiliary
device ports . 7
Table 2 – Intrinsically safe parameters for 2-WISE communication only ports . 8

IEC TS 60079-47:2021  IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 47: Equipment protection by 2-wire intrinsically
safe Ethernet concept (2-WISE)

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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In exceptional
circumstances, a technical committee may propose the publication of a technical specification
when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide whether
they can be transformed into International Standards.
IEC TS 60079-47, which is a technical specification, has been prepared by subcommittee 31G:
Intrinsically safe apparatus, of IEC technical committee 31: Equipment for explosive
atmospheres.
– 4 – IEC TS 60079-47:2021  IEC 2021
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
31G/323/DTS 31G/334/RVC
Full information on the voting for the approval of this technical specification can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60079 series, published under the general title Explosive
atmospheres, 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 "http://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.
IEC TS 60079-47:2021  IEC 2021 – 5 –
EXPLOSIVE ATMOSPHERES –
Part 47: Equipment protection by 2-wire intrinsically
safe Ethernet concept (2-WISE)

1 Scope
This part of IEC 60079, which is a technical specification, specifies requirements for the
construction, marking and documenting of apparatus, systems and installations for use with the
2-Wire Intrinsically Safe Ethernet concept (2-WISE), such as the physical layer specification for
2-Wire Ethernet 10BASE-T1L as defined in IEEE 802.3cg.
2-WISE is a concept for an advanced physical layer (APL), designed to simplify the examination
process f
...