|
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)
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de
CH-1211 Geneva 20
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 18 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
.
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
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.
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 for intrinsic safety parameters of components and cabling within APL segments. This
is achieved by defining universal intrinsic safety parameter limits for APL ports, according to
the specific hazardous area requirements and listing a concise set of rules for the segment
setup.
The requirements for construction and installation of 2-WISE devices and systems are included
in IEC 60079-11, IEC 60079-14, and IEC 60079-25, except as modified by this document. Parts
of a 2-WISE device can be protected by any Type of Protection listed in IEC 60079-0
appropriate to the EPL for the intended hazardous area. In these circumstances, the
requirements of this technical specification apply only to intrinsically safe circuits of the
apparatus.
Where a requirement of this document conflicts with a requirement of IEC 60079-0,
IEC 60079-11, IEC 60079-14 or IEC 60079-25, the requirements of this document take
precedence.
2 Normative references
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.
IEC 60079-0, Explosive atmospheres - Part 0: Equipment - General requirements
IEC 60079-11, Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
IEC 60079-14, Explosive atmospheres - Part 14: Electrical installations design, selection and
erection
IEC 60079-25, Explosive atmospheres - Part 25: Intrinsically safe electrical systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60079-0,
IEC 60079-11, IEC 60079-14, IEC 60079-25 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
– 6 – IEC TS 60079-47:2021 IEC 2021
3.1
10BASE-T1L
physical layer standard for 10 Mb/s Ethernet communication over a single balanced twisted-
pair copper cabling with optional provision of power
Note 1 to entry: This is standardized in IEEE 802.3cg.
3.2
Advanced Physical Layer
APL
physical layer based on 10BASE-T1L
3.3
2-Wire Intrinsically Safe Ethernet
2-WISE
intrinsically safe electrical d
...