IEC 61918:2018/AMD1:2022
(Amendment)Amendment 1 - Industrial communication networks - Installation of communication networks in industrial premises
Amendment 1 - Industrial communication networks - Installation of communication networks in industrial premises
Amendement 1 - Réseaux de communication industriels - Installation de réseaux de communication dans des locaux industriels
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Standards Content (Sample)
IEC 61918
®
Edition 4.0 2022-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
AMENDMENT 1
AMENDEMENT 1
Industrial communication networks – Installation of communication networks in
industrial premises
Réseaux de communication industriels – Installation de réseaux de
communication dans des locaux industriels
IEC 61918:2018-09/AMD1:2022-03(en-fr)
---------------------- Page: 1 ----------------------
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IEC 61918
®
Edition 4.0 2022-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
A MENDMENT 1
AM ENDEMENT 1
Industrial communication networks – Installation of communication networks in
industrial premises
Réseaux de communication industriels – Installation de réseaux de
communication dans des locaux industriels
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 33.020, 35.240.50 ISBN 978-2-8322-1085-4
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® Registered trademark of the International Electrotechnical Commission
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---------------------- Page: 3 ----------------------
– 2 – IEC 61918:2018/AMD1:2022
© IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS – INSTALLATION OF
COMMUNICATION NETWORKS IN INDUSTRIAL PREMISES
AMENDMENT 1
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
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rights. IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 61918:2018 has been prepared by subcommittee 65C: Industrial networks,
of IEC technical committee 65: Industrial-process measurement, control and automation.
The text of this Amendment is based on the following documents:
Draft Report on voting
65C/1141/FDIS 65C/1162/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 Amendment is English.
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IEC 61918:2018/AMD1:2022 – 3 –
© IEC 2022
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/.
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.
___________
INTRODUCTION to Amendment 1
This Amendment 1 describes the installation in the critical environment of industrial premises
of balanced 1-pair networks that use cabling in connection with Ethernet specified in
1000BASE-T1 type A, which allows bidirectional signal transmission at 1 000 Mbit/s up to 15 m,
1000BASE-T1 type B for 1 000 Mbit/s up to 40 m, 100BASE-T1 for 100 Mbit/s up to 15 m,
10BASE-T1S for 10 Mbit/s up to 15 m, 10BASE-T1L for 10 Mbit/s up to 1 000 m.
These balanced 1-pair networks use the industrial versions of 1 000 Mbit/s and 100 Mbit/s
ISO/IEC/IEEE 8802-3:2021, and 10 Mbit/s IEEE Std 802.3cg networks.
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© IEC 2022
INTRODUCTION
Replace Figure 2 with the following updated figure.
Figure 2 – Standards relationships
2 Normative references
Delete the following normative references:
IEC 61935-1:2015, Specification for the testing of balanced and coaxial information technology
cabling – Part 1: Installed balanced cabling as specified in ISO/IEC 11801 and related
standards
ISO/IEC 8802-3, Information technology – Telecommunications and information exchange
between systems – Local and metropolitan area networks – Specific requirements – Part 3:
Standard for Ethernet
Add the following normative references:
IEC 61000-4-4, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measurement
techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) – Part 4-5: Testing and measurement
techniques – Surge immunity test
IEC 61010-2-201, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 2-201: Particular requirements for control equipment
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IEC 61918:2018/AMD1:2022 – 5 –
© IEC 2022
1
IEC 61010-2-203:— , Safety requirements for electrical equipment for measurement, control,
and laboratory use – Part 2-203: Particular requirements for industrial communication circuits
and communication port interconnection
IEC 61156-1, Multicore and symmetrical pair/quad cables for digital communications – Part 1:
Generic specification
IEC 61156-11, Multicore and symmetrical pair/quad cables for digital communications – Part 11:
Symmetrical single pair cables with transmission characteristics up to 600 MHz – Horizontal
floor wiring – Sectional specification
IEC 61156-12, Multicore and symmetrical pair/quad cables for digital communications – Part 12:
Symmetrical single pair cables with transmission characteristics up to 600 MHz – Work area
wiring – Sectional specification
IEC 61935-1:2019, Specification for the testing of balanced and coaxial information technology
cabling – Part 1: Installed balanced cabling as specified in ISO/IEC 11801-1 and related
standards
IEC 61935-1-1:2019, Specification for the testing of balanced and coaxial information
technology cabling – Part 1-1: Additional requirements for the measurement of transverse
conversion loss and equal level transverse conversion transfer loss
IEC 63171-6, Connectors for electrical and electronic equipment – Part 6: Detail specification
for 2-way and 4-way (data/power), shielded, free and fixed connectors for power and data
transmission with frequencies up to 600 MHz
ISO/IEC/IEEE 8802-3:2021, Telecommunications and exchange between information
technology systems – Requirements for local and metropolitan area networks – Part 3: Standard
for Ethernet
ISO/IEC 11801-3:2017/AMD1:2021, Amendment 1 – Information technology – Generic cabling
for customer premises – Part 3: Industrial premises
IEEE Std 802.3cg, IEEE Standard for Ethernet – Amendment 5, Physical Layer Specifications
and Management Parameters for 10 Mb/s Operation and Associated Power Delivery over a
Single Balanced Pair of Conductors
3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions
Replace, in the boilerplate paragraph, "ISO/IEC 8802-3" with "ISO/IEC/IEEE 8802-3:2021".
Add the following new terms and definitions from 3.1.87 to 3.1.92:
3.1.87
balanced 1-pair cable
cable consisting of a single pair of conductors, optional screen, and overall jacket, primarily
intended for use in differential-mode signal transmission and power delivery applications
[SOURCE: ISO/IEC TR 11801-9906:2020, 3.1.2]
___________
1
Under preparation. Stage at the time of publication: IEC/ACDV 61010-2-203:2021.
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© IEC 2022
3.1.88
balanced 1-pair cabling
cabling composed of balanced 1-pair cables and balanced 1-pair connectors
3.1.89
balanced 1-pair cabling channel
transmission path between equipment constructed from balanced 1-pair cables, balanced 1-pair
connectors and balanced 1-pair cable assemblies to facilitate signal and power delivery
[SOURCE: ISO/IEC 11801-3:2017/AMD1:2021, 3.1.14]
3.1.90
balanced 1-pair connector
connector intended for use with balanced 1-pair cable in differential-mode signal transmission
and power delivery applications
[SOURCE: ISO/IEC TR 11801-9906:2020, 3.1.3]
3.1.91
balanced 1-pair cord
cable assembly constructed from a 1-pair cable and 1-pair connectors
[SOURCE: ISO/IEC TR 11801-9906:2020, 3.1.4]
3.1.92
edge distributor
optional additional distributor to accommodate active equipment to allow transition from
balanced 4-pair cabling to balanced 1-pair cabling
[SOURCE: ISO/IEC 11801-3:2017/AMD1:2021, 3.1.15]
3.2 Abbreviated terms
Add the following abbreviated terms:
ED edge distributor
PHY physical layer
4 Installation planning
4.1.2 Cabling in industrial premises
Add, at the end of the first bullet of the first list, the following text:
, this includes the balanced 1-pair cablings that are specified in Annex Q;
Add, at the end of the third paragraph, the following text:
The industrial cabling may include an edge distributor to accommodate active equipment to
allow transition from balanced 4-pair cabling to balanced 1-pair cabling.
Replace, in the second bullet of the second list, "(ISO/IEC 8802-3)" with
"(ISO/IEC/IEEE 8802-3:2021 and IEEE Std 802.3cg)".
4.1.3 The planning process
Replace, in the first dash of the first bullet, "IEC 60950-1" with "IEC 61010-2-201".
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IEC 61918:2018/AMD1:2022 – 7 –
© IEC 2022
4.2.1.2 Electrical safety
Add ", IEC 61010-2-203" after "IEC 61010-2-201".
4.2.3.2 Use of the described environment to produce a bill of material
Add, before Figure 7, the following sentence:
The planner, when consulting the device and cabling manufacturer, shall take into account the
guidance provided in Clause B.6 for the correct selection of the device and cabling in relation
to the environment EMI of the installation under consideration.
4.3.2.1 General
Add, at the end of the subclause, the following text:
Media types consist of optical fibre cabling, balanced cabling (4-pair, 2-pair, 1-pair), wireless,
and other CP specific media types. Wireless network installation is not within the scope of this
document. Selection of physical media technologies should partner with architectural
considerations, taking into account network topology, network characteristics, as well as data
propagation and aggregation throughout the network.
Optical fibre is generally recommended where high bandwidth is needed or a high data integrity
is required. Where powering is required or for reduced bandwidth or length compared to optical
fibre, wire cabling is recommended. 4-pair is mostly recommended for connecting control and
automation equipment. 1-pair (see Annex Q) is mostly limited to connecting control and
automation equipment with field devices.
The planner should take into account EMI performance when selecting cabling types and
spacings from types of conductors. In practice, need for EMI reduction equates to increase in
spacing, which can translate to installation cost. Failure to consider EMI performance and
mitigations can ultimately lead to areas of high disturbance at critical points in the network.
Comparative measurements (unshielded versus shielded) have shown that shielded
constructions can provide a higher level of protection against EMI when applied according to
equipment manufacturers specifications.
4.3.2.3 Network characteristics for balanced cabling based on Ethernet
Add, at the end of the subclause, the following text:
For balanced 1-pair networks, the requirements specified in Annex Q apply.
4.4.1.2.1 Balanced cables for Ethernet-based CPs
Add, after the first sentence, the following text:
For balanced 1-pair cables, the requirements specified in Annex Q apply.
Replace, in the fourth bullet, "cabling that uses mixed 2 and 4 pair cable elements in the same
channel" with "cabling that uses cable elements with a different pair count in the same channel
(e.g., 2- and 4-pair or 1- and 4-pair),"
Delete the NOTE after the fourth bullet.
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© IEC 2022
4.4.2.2 Connecting hardware for balanced cabling CPs based on Ethernet
Add, at the end of this subclause, the following text:
For balanced 1-pair connecting hardware the requirements specified in Annex Q apply.
4.4.3.1 Common description
Add, at the end of the first sentence of the fifth paragraph, the following text:
for 4-pair cabling. For 1-pair cabling, the requirements specified in Annex Q apply.
Replace, at the end of the second sentence of the fifth paragraph, "are limited to 4. If the
planning requires more than 4 connections," with "have a limited number of connections (e.g.,
4 for 4-pair and 10 for 1-pair). If the planning requires more connections than the corresponding
reference implementation,"
4.4.3.2.1 Common description
Change title of item a) to: "a) 4-pair basic reference implementation"
Change title of item b) to: "b) 4-pair enhanced reference implementation"
Add, after item c) the following new item:
d) Balanced 1-pair cabling
For balanced 1-pair cabling connections, the requirements specified in Annex Q apply.
4.4.3.4.1 Common description
Replace, in the first paragraph, "ISO/IEC 8802-3" with "ISO/IEC/IEEE 8802-3:2021".
4.4.7.1.4 Selection of the earthing and bonding systems
Replace, in the first sentence of the last paragraph, "equipotential" with "mesh".
4.4.7.3.1 Equipotential
Replace the title of the subclause with "Mesh".
Replace, in the title of Figure 17, "an equipotential" with "a mesh".
5 Installation implementation
5.1.1 Common description
Add, at the end of the subclause, the following text:
The requirements specified in this Clause 5 for the CPs also apply for the installation
implementation of balanced 1-pair networks specified in Annex Q.
Additional requirements are specified in Clause Q.3.
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IEC 61918:2018/AMD1:2022 – 9 –
© IEC 2022
6 Installation verification and installation acceptance test
6.1 General
Add, at the end of the subclause, the following text:
The requirements specified in this Clause 6 for the CPs also apply for the installation
implementation of balanced 1-pair networks specified in Annex Q.
Additional requirements for balanced 1-pair network are specified in Clause Q.4.
6.2.8.3 Wire mapping
Replace, in the first paragraph of this subclause, "5.3.2.2 of IEC 61935-1:2015" with "5.3.3.2 of
IEC 61935-1:2019.
Add, after Figure 45 the following sentence:
For balanced 1-pair applications, the requirements specified in Q.4.2 apply.
6.3.2.1.2 Transmission performance test parameters
Replace, in the first paragraph, "IEC 61935-1:2015" with "IEC 61935-1:2019 and IEC 61935-1-
1:2019"
Add, after the last item l), the following new items:
m) Unbalance attenuation, near-end (TCL)
n) Unbalance attenuation, far-end (ELTCTL)
Add, after new items m) and n), the following new paragraph:
Items m) and n) above apply where requirements are given in the relevant CP.
8 Installation maintenance and installation troubleshooting
8.3.3 Typical problems
Add, after the first paragraph, the following text:
When troubleshooting unshielded installations, EMC influence can be quantified through field-
testing of TCL and ELTCTL transmission parameters. If needed, noise impact reduction may
be achieved by identification of at-risk components and selection of replacement components
with superior performance.
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© IEC 2022
Annex B MICE description methodology
B.4 Determining E classification
Replace Table B.3 with the following new table:
Table B.3 – Relationship between electromagnetic
disturbance-generating devices and “E” classification
Electromagnetic disturbance-generating Distance from cabling “E” classification
device
Contactor relay E
< 0,5 m
2
E
> 0,5 m
1
Transmitters (< 1 W) < 0,5 m E
3
> 0,5 m E or E
1 2
Transmitters (1 W to 3 W) E
< 1,0 m
3
E or E
≥ 1,0 m
1 2
Transmitters (TV, radio, mobile, base station) < 3 km E
3
≥ 3 km E or E
1 2
High power motors E
< 3 m
3
> 3 m E or E
1 2
Motor controllers < 0,5 m E
3
0,5 m to 3 m E
2
E
> 3 m
1
Induction heating < 8 MW < 0,5 m E
3
0,5 m to 3 m E
2
E
> 3 m
1
Resistance heating < 0,5 m E
2
> 0,5 m E
1
Fluorescent lights E
< 0,15 m
3
E or E
> 0,15 m
1 2
Thermostatic switches 110 V to 230 V < 0,5 m E or E
2 3
> 0,5 m E
1
Add, after Clause B.5, the following new clause:
B.6 Communication devices and cabling considerations
B.6.1 General
The planner should consult the device and cabling manufacturer regarding correct selection of
the device and cabling for the application under consideration.
The impact of industrial environment EMI on the communication network could result in
incorrect reconstruction of the signal at the receiver.
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IEC 61918:2018/AMD1:2022 – 11 –
© IEC 2022
The requirements specified in Clause 4, Clause 5 and Clause 6 fully clarify the mitigation
measures to be used for the cabling. In this Annex B, some additional clarifications are provided
in regard to the selection of the proper communication devices and cabling.
Communication devices are available with different constructions in order to serve a large range
of different applications. The most critical impact of the industrial environment EMI on the
devices is the saturation of the device physical layer interface with the cabling, which happens
when the common mode (CM) voltage tolerance of the devices is less than the impact of the
conducted disturbances.
Typically, the level of the CM voltage tolerance of a device depends on the performance of the
device interface with the cabling.
B.6.2 Device types
From the point of view of the enhanced device interface immunity, the communication devices
may be grouped in two types.
a) Devices type 1
Figure B.8 and Figure B.9 show the structures of the device type 1 interfaces.
Figure B.8 – Communication device interface with limited EMI immunity
All the devices having type 1 interface, if associated with shielded cabling whose CA is at least
60 dB, can provide a compatibility with electromagnetic interferences up to the E3.
The use of unshielded cabling is not recommended in combination with devices type 1 for
environments E2 and E3. In fact, these resulting combinations would require the use of costly
and complex additional mitigation measures (see Clause 4 and Clause 5).
NOTE 1 All communication device interface figures only show the interface of the master device. The same interface
is used at the field device, to prevent the saturation effect also on this side.
NOTE 2 It is possible to assess coupling attenuation by laboratory measurements of representative samples of
channels assembled using their component and connector practices.
---------------------- Page: 13 ----------------------
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© IEC 2022
Figure B.9 – Communication device interfaces with medium EMI immunity
Figure B.9 shows the structure of two equivalent interfaces of the device type 1, with improved
CM voltage tolerance at their interface. The interface that includes CM chokes may serve for
intrinsic safety applications, where transformers cannot be used.
b) Device type 2
Figure B.10 shows the structure of the device type 2 interfaces, where a more complete set of
mitigation elements is added at the device interface, as CM chokes and isolation transformers.
Figure B.10 – Communication device interface with the highest EMI immunity (type 2)
Type 2 interfaces, if combined with shielded cabling whose CA is at least 60 dB, can provide
an improved CM voltage tolerance, which makes them suitable for the most aggressive
interferences (even more than E3). This also means that type 2 devices could be used
irrespective of the level of the electromagnetic interference, with the advantages for both the
manufacturer and the user, which derive from managing just one type.
Devices type 2 may also be used with unshielded cabling, provided that the cabling has TCL
and ELTCL = 80 − 20log(f), 46 dB maximum.
B.6.3 EMI resistance needed for E3 industrial applications
Table B.6 shows device and cabling requirements when E3 resistance is required.
Table B.6 – EMI resistance of industrial applications
Test procedure Value (kV)
IEC 61000-4-4 Electrical fast transient/burst immunity test 2
IEC 61000-4-5 Surge immunity test 2
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IEC 61918:2018/AMD1:2022 – 13 –
© IEC 2022
Annex H Cord sets
Add, after subclause H.2.10, the following new subclause:
H.2.11 Straight through cord set with IEC 63171-6 connectors
Signal and pin assignment are specified in Q.2.4.
Annex I Guidance for terminating cable ends
I.4 Guidance for M12-4 D-coding connector installation
Replace the title of this subclause with "Guidance for M12 connector installation".
Add, after the first sentence of the first paragraph, the following text:
This procedure is applicable to all M12 coded connectors, including the M12 X-coding, by
applying the appropriate wiring map in step i) according to the corresponding wire map table in
Annex D. The basic steps of this procedure are also applicable to type M12 and type M8 of
IEC 63171-6 connector, specified in Q.2.4.
Annex J Recommendations for bulkhead connection performance and channel
performance with more than 4 connections in the channel
Replace, in the title of Annex J, "in the channel" with "in a 4-pair channel"
J.1 General
Add, at the end of the sentence, the following text: "in a 4-pair channel."
Annex K Fieldbus data transfer t
...
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