EN IEC 61784-5-8:2018

SLOVENSKI STANDARD
01-april-2019
1DGRPHãþD
SIST EN 61784-5-8:2014
Industrijska komunikacijska omrežja - Profili - 5-8. del: Inštalacija procesnih vodil -
Inštalacijski profili za CPF 8 (IEC 61784-5-8:2018)
Industrial communication networks - Profiles - Part 5-8: Installation of fieldbuses -
Installation profiles for CPF 8 (IEC 61784-5-8:2018)
Industrielle Kommunikationsnetze - Profile - Teil 5-8: Feldbusinstallation -
Installationsprofile für die Kommunikationsprofilfamilie 8 (IEC 61784-5-8:2018)
Réseaux de communication industriels - Profils - Partie 5-8: Installation des bus de
terrain - Profils d'installation pour CPF 8 (IEC 61784-5-8:2018)
Ta slovenski standard je istoveten z: EN IEC 61784-5-8:2018
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.40 Transportni sloj Transport layer
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61784-5-8

NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2018
ICS 25.040.40; 35.100.40 Supersedes EN 61784-5-8:2013
English Version
Industrial communication networks - Profiles - Part 5-8:
Installation of fieldbuses - Installation profiles for CPF 8
(IEC 61784-5-8:2018)
Réseaux de communication industriels - Profils - Partie 5-8: Industrielle Kommunikationsnetze - Profile - Teil 5-8:
Installation des bus de terrain - Profils d'installation pour Feldbusinstallation - Installationsprofile für die
CPF 8 Kommunikationsprofilfamilie 8
(IEC 61784-5-8:2018) (IEC 61784-5-8:2018)
This European Standard was approved by CENELEC on 2018-10-04. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61784-5-8:2018 E

European foreword
The text of document 65C/924/FDIS, future edition 2 of IEC 61784-5-8, prepared by SC 65C
"Industrial networks" of IEC/TC 65 "Industrial-process measurement, control and automation" was
submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61784-5-8:2018.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2019-07-04
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2021-10-04
document have to be withdrawn
This document supersedes EN 61784-5-8:2013.
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.

Endorsement notice
The text of the International Standard IEC 61784-5-8:2018 was approved by CENELEC as a
European Standard 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 61918 2018 Industrial communication networks - Installation of EN IEC 61918 2018
communication networks in industrial premises
The normative references of EN IEC 61918:2018, Clause 2, apply.
NOTE For profile specific normative references, see Clauses A.2, B.2, C.2, and D.2 respectively.

IEC 61784-5-8 ®
Edition 2.0 2018-08
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Profiles –

Part 5-8: Installation of fieldbuses – Installation profiles for CPF 8

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.40 ISBN 978-2-8322-5941-2

– 2 – IEC 61784-5-8:2018 © IEC 2018
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 9
4 CPF 8: Overview of installation profiles . 9
5 Installation profile conventions . 10
6 Conformance to installation profiles . 10
Annex A (normative) CP 8/1 and CP 8/2 (CC-Link/V1 and CC-Link/V2) specific
installation profile . 12
A.1 Installation profile scope . 12
A.2 Normative references . 12
A.3 Installation profile terms, definitions, and abbreviated terms . 12
A.3.1 Terms and definitions . 12
A.3.2 Abbreviated terms . 12
A.3.3 Conventions for installation profiles . 12
A.4 Installation planning . 12
A.4.1 General . 12
A.4.2 Planning requirements . 13
A.4.3 Network capabilities. 13
A.4.4 Selection and use of cabling components . 15
A.4.5 Cabling planning documentation . 20
A.4.6 Verification of cabling planning specification . 20
A.5 Installation implementation . 20
A.5.1 General requirements . 20
A.5.2 Cable installation . 21
A.5.3 Connector installation . 22
A.5.4 Terminator installation . 22
A.5.5 Device installation . 23
A.5.6 Coding and labelling . 23
A.5.7 Earthing and bonding of equipment and devices and shield cabling . 23
A.5.8 As-implemented cabling documentation . 24
A.6 Installation verification and installation acceptance test . 24
A.6.1 General . 24
A.6.2 Installation verification . 24
A.6.3 Installation acceptance test . 25
A.7 Installation administration . 25
A.8 Installation maintenance and installation troubleshooting . 25
Annex B (normative) CP 8/3 (CC-Link/LT) specific installation profile . 26
B.1 Installation profile scope . 26
B.2 Normative references . 26
B.3 Installation profile terms, definitions, and abbreviated terms . 26
B.3.1 Terms and definitions . 26
B.3.2 Abbreviated terms . 26
B.3.3 Conventions for installation profiles . 26
B.4 Installation planning . 26

IEC 61784-5-8:2018 © IEC 2018 – 3 –
B.4.1 General . 26
B.4.2 Planning requirements . 27
B.4.3 Network capabilities. 27
B.4.4 Selection and use of cabling components . 30
B.4.5 Cabling planning documentation . 37
B.4.6 Verification of cabling planning specification . 37
B.5 Installation implementation . 37
B.5.1 General requirements . 37
B.5.2 Cable installation . 37
B.5.3 Connector installation . 38
B.5.4 Terminator installation . 39
B.5.5 Device installation . 39
B.5.6 Coding and labelling . 39
B.5.7 Earthing and bonding of equipment and devices and shield cabling . 39
B.5.8 As-implemented cabling documentation . 40
B.6 Installation verification and installation acceptance test . 40
B.6.1 General . 40
B.6.2 Installation verification . 40
B.6.3 Installation acceptance test . 41
B.7 Installation administration . 41
B.8 Installation maintenance and installation troubleshooting . 41
Annex C (normative) CP 8/4 (CC-Link IE Controller Network) specific installation
profile . 42
C.1 Installation profile scope . 42
C.2 Normative references . 42
C.3 Installation profile terms, definitions, and abbreviated terms . 42
C.3.1 Terms and definitions . 42
C.3.2 Abbreviated terms . 42
C.3.3 Conventions for installation profiles . 42
C.4 Installation planning . 42
C.4.1 General . 42
C.4.2 Planning requirements . 42
C.4.3 Network capabilities. 43
C.4.4 Selection and use of cabling components . 45
C.4.5 Cabling planning documentation . 50
C.4.6 Verification of cabling planning specification . 51
C.5 Installation implementation . 51
C.5.1 General requirements . 51
C.5.2 Cable installation . 51
C.5.3 Connector installation . 52
C.5.4 Terminator installation . 53
C.5.5 Device installation . 53
C.5.6 Coding and labelling . 53
C.5.7 Earthing and bonding of equipment and devices and shield cabling . 53
C.5.8 As-implemented cabling documentation . 54
C.6 Installation verification and installation acceptance test . 54
C.6.1 General . 54
C.6.2 Installation verification . 54
C.6.3 Installation acceptance test . 55

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C.7 Installation administration . 55
C.8 Installation maintenance and installation troubleshooting . 56
Annex D (normative) CP 8/5 (CC-Link IE Field Network) specific installation profile . 57
D.1 Installation profile scope . 57
D.2 Normative references . 57
D.3 Installation profile terms, definitions, and abbreviated terms . 57
D.3.1 Terms and definitions . 57
D.3.2 Abbreviated terms . 57
D.3.3 Conventions for installation profiles . 57
D.4 Installation planning . 57
D.4.1 General . 57
D.4.2 Planning requirements . 57
D.4.3 Network capabilities. 58
D.4.4 Selection and use of cabling components . 59
D.4.5 Cabling planning documentation . 64
D.4.6 Verification of cabling planning specification . 65
D.5 Installation implementation . 65
D.5.1 General requirements . 65
D.5.2 Cable installation . 65
D.5.3 Connector installation . 66
D.5.4 Terminator installation . 66
D.5.5 Device installation . 67
D.5.6 Coding and labelling . 67
D.5.7 Earthing and bonding of equipment and devices and shield cabling . 67
D.5.8 As-implemented cabling documentation . 68
D.6 Installation verification and installation acceptance test . 68
D.6.1 General . 68
D.6.2 Installation verification . 68
D.6.3 Installation acceptance test . 69
D.7 Installation administration . 69
D.8 Installation maintenance and installation troubleshooting . 69
Bibliography . 70

Figure 1 – Standards relationships . 8
Figure A.1 – Pass-through connector configuration . 14
Figure A.2 – Bus t-branch topology . 14
Figure A.3 – Wiring . 17
Figure B.1 – Powered network topology . 28
Figure B.2 – Bus t-branch topology . 28
Figure B.3 – Flat cable cross section – with key . 31
Figure B.4 – Flat cable cross section – without key . 31
Figure B.5 – Flat cable polarity marking . 31
Figure B.6 – Wiring . 32
Figure B.7 – Flat cable connector and terminal cover . 33

Table A.1 – Basic network characteristics for balanced cabling not based on Ethernet . 15
Table A.2 – Bus t-branch network characteristics . 15

IEC 61784-5-8:2018 © IEC 2018 – 5 –
Table A.3 – Information relevant to copper cable: fixed cables . 16
Table A.4 – Connectors for copper cabling CPs not based on Ethernet . 17
Table A.5 – Parameters for balanced cables . 21
Table A.6 – Cable conductor assignments . 22
Table B.1 – Basic network characteristics for balanced cabling not based on Ethernet . 29
Table B.2 – CP 8/3 additional topology length limits . 29
Table B.3 – Information relevant to copper cable: cords . 31
Table B.4 – Connectors for copper cabling CPs not based on Ethernet . 34
Table B.5 – Parameters for balanced cables . 37
Table B.6 – Flat cable conductor assignments . 38
Table C.1 – Network characteristics for balanced cabling based on Ethernet . 44
Table C.2 – Network characteristics for optical fibre cabling . 44
Table C.3 – Information relevant to copper cable: fixed cables. 45
Table C.4 – Information relevant to optical fibre cables . 46
Table C.5– Connectors for balanced cabling CPs based on Ethernet . 46
Table C.6 – Optical fibre connecting hardware . 47
Table C.7 – Relationship between FOC and fibre types (CP 8/4) . 47
Table C.8 – Parameters for balanced cables . 51
Table C.9 – Parameters for silica optical fibre cables . 51
Table D.1 – Network characteristics for balanced cabling based on Ethernet . 59
Table D.2 – Information relevant to copper cable: fixed cables. 60
Table D.3 – Connectors for balanced cabling CPs based on Ethernet . 61
Table D.4 – Parameters for balanced cables . 65

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
PROFILES –
Part 5-8: Installation of fieldbuses –
Installation profiles for CPF 8

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,
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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.
International Standard IEC 61784-5-8 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This second edition cancels and replaces the first edition published in 2013. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) The reference to ISO/IEC 24702 has been replaced with reference to the new
ISO/IEC 11801-3;
b) Annex C has been extended to cover the balanced cabling based on Ethernet that is
applicable to CP8/4. Table C.1, Table C.3, Table C.5 and Table C.8 are added;

IEC 61784-5-8:2018 © IEC 2018 – 7 –
c) Annex D has been extended to cover the M12-8 X-coding connector use that is applicable
to CP/8/5. Table D.3 is revised.
This standard is to be used in conjunction with IEC 61918:2018.
The text of this International Standard is based on the following documents:
FDIS Report on voting
65C/924/FDIS 65C/925/RVD
Full information on the voting for the approval of this International Standard 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 of IEC 61784-5 series, under the general title Industrial communication
networks – Profiles – Installation of fieldbuses, 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 web site 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.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication 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.
– 8 – IEC 61784-5-8:2018 © IEC 2018
INTRODUCTION
This International Standard is one of a series produced to facilitate the use of communication
networks in industrial control systems.
IEC 61918:2018 provides the common requirements for the installation of communication
networks in industrial control systems. This installation profile standard provides the
installation profiles of the communication profiles (CP) of a specific communication profile
family (CPF) by stating which requirements of IEC 61918:2018 fully apply and, where
necessary, by supplementing, modifying, or replacing the other requirements (see Figure 1).
For general background on fieldbuses, their profiles, and relationship between the installation
profiles specified in this document, see IEC 61158-1.
Each CP installation profile is specified in a separate annex of this document. Each annex is
structured exactly as the reference standard IEC 61918:2018 for the benefit of the persons
representing the roles in the fieldbus installation process as defined in IEC 61918:2018
(planner, installer, verification personnel, validation personnel, maintenance personnel,
administration personnel). By reading the installation profile in conjunction with IEC
61918:2018, these persons immediately know which requirements are common for the
installation of all CPs and which are modified or replaced. The conventions used to draft this
document are defined in Clause 5.
The provision of the installation profiles in one standard for each CPF (for example
IEC 61784-5-8 for CPF 8), allows readers to work with standards of a convenient size.

Figure 1 – Standards relationships

IEC 61784-5-8:2018 © IEC 2018 – 9 –
INDUSTRIAL COMMUNICATION NETWORKS –
PROFILES –
Part 5-8: Installation of fieldbuses –
Installation profiles for CPF 8

1 Scope
This part of IEC 61784-5 specifies the installation profiles for CPF 8 (CC-Link ).
The installation profiles are specified in the annexes. These annexes are read in conjunction
with IEC 61918:2018.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61918:2018, Industrial communication networks – Installation of communication networks
in industrial premises
The normative references of IEC 61918:2018, Clause 2, apply.
NOTE For profile specific normative references, see Clauses A.2, B.2, C.2and D.2 respectively.
3 Terms, definitions and abbreviated terms
For the purpose of this document, the terms, definitions and abbreviated terms given in IEC
61918:2018, Clause 3, 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
NOTE For profile specific normative references, see Clauses A.3, B.3, C.3 and D.3 respectively.
4 CPF 8: Overview of installation profiles
CPF 8 consists of 5 Communication Profiles as specified in IEC 61784-1:— and
IEC 61784-2:—.
___________
CC-Link, CC-Link/LT and CC-Link IE are trade names of Mitsubishi Electric Co., control of trade name use is
given to CCLink Partner Association. This information is given for the convenience of users of this document
and does not constitute an endorsement by IEC of the trademark holder or any of its products. Compliance to
this profile does not require use of the trade name. Use of the trade name requires permission of the trade
name holder.
– 10 – IEC 61784-5-8:2018 © IEC 2018
The installation requirements for CP 8/1 (CC-Link/V1) and CP 8/2 (CC-Link/V2) are specified
in Annex A.
The installation requirements for CP 8/3 (CC-Link/LT) are specified in Annex B.
The installation requirements for CP 8/4 (CC-Link IE Controller Network) are specified in
Annex C.
The installation requirements for CP 8/5 (CC-Link IE Field Network) are specified in Annex D.
5 Installation profile conventions
The numbering of the clauses and subclauses in the annexes of this document corresponds to
the numbering of IEC 61918 main clauses and subclauses.
The annex clauses and subclauses of this document supplement, modify, or replace the
respective clauses and subclauses in IEC 61918
Where there is no corresponding subclause of IEC 61918 in the normative annexes in this
document, the subclause of IEC 61918 applies without modification.
The annex heading letter represents the installation profile assigned in Clause 4. The annex
heading number shall represent the corresponding numbering of IEC 61918.
EXAMPLE "Subclause B.4.4" in IEC 61784-5-8 means that CP 8/3 specifies the subclause 4.4 of IEC 61918.
All main clauses of IEC 61918 are cited and apply in full unless otherwise stated in each
normative installation profile annex.
If all subclauses of a (sub)clause are omitted, then the corresponding IEC 61918 (sub)clause
applies.
If in a (sub)clause it is written "Not applicable", then the corresponding IEC 61918 (sub)clause
does not apply.
If in a (sub)clause it is written "Addition:", then the corresponding IEC 61918 (sub)clause
applies with the additions written in the profile.
If in a (sub)clause it is written "Replacement:", then the text provided in the profile replaces
the text of the corresponding IEC 61918 (sub)clause.
NOTE A replacement can also comprise additions.
If in a (sub)clause it is written "Modification:", then the corresponding IEC 61918 (sub)clause
applies with the modifications written in the profile.
If all (sub)clauses of a (sub)clause are omitted but in this (sub)clause it is written
"(Sub)clause x has addition:" (or "replacement:") or "(Sub)clause x is not applicable.", then
(sub)clause x becomes valid as declared and all the other corresponding
IEC 61918 (sub)clauses apply.
6 Conformance to installation profiles
Each installation profile within this document includes part of IEC 61918:2018. It may also
include defined additional specifications.

IEC 61784-5-8:2018 © IEC 2018 – 11 –
A statement of compliance to an installation profile of this document shall be stated as either
Compliance to IEC 61784-5-8:— for CP 8/m or
Compliance to IEC 61784-5-8 (Ed.2.0) for CP 8/m
where the name within the angle brackets < > is optional and the angle brackets are not to be
included. The m within CP 8/m shall be replaced by the profile number 1 to 5.
NOTE The name may be the name of the profile, as: CC-Link/V1, CC-Link/V2, CC-Link/LT, CC-Link IE Controller
Network, or CC-Link IE Field Network.
If the name is a trade name then the permission of the trade name holder shall be required.
Product standards shall not include any conformity assessment aspects (including quality
management provisions), neither normative nor informative, other than provisions for product
testing (evaluation and examination).

___________
In accordance with ISO/IEC Directives.
The date should not be used when the edition number is used.

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Annex A
(normative)
CP 8/1 and CP 8/2 (CC-Link/V1 and CC-Link/V2) specific installation profile
A.1 Installation profile scope
Addition:
This annex specifies the installation profile for Communication Profile CP 8/1 (CC-Link/V1)
and CP 8/2 (CC-Link/V2). The CP 8/1 and CP 8/2 are specified in IEC 61784-1.
CP 8/1 and CP 8/2 networks implement a medium attachment unit compliant with
ISO/IEC 8482 and is a derivative of ANSI TIA/EIA-485-A.
A.2 Normative references
Addition:
ISO/IEC 8482, Information technology – Telecommunications and information exchange
between systems – Twisted pair multipoint interconnections
ANSI TIA/EIA-485-A, Electrical Characteristics of Generators and Receivers for Use in
Balanced Digital Multipoint Systems
A.3 Installation profile terms, definitions, and abbreviated terms
A.3.1 Terms and definitions
A.3.2 Abbreviated terms
A.3.3 Conventions for installation profiles
Not applicable.
A.4 Installation planning
A.4.1 General
A.4.1.1 Objective
A.4.1.2 Cabling in industrial premises
Addition:
Generic cabling in accordance with ISO/IEC 11801-3 is not suitable for the cabling of CP 8/1
or CP 8/2 networks.
A.4.1.3 The planning process
A.4.1.4 Specific requirements for CPs
Not applicable.
IEC 61784-5-8:2018 © IEC 2018 – 13 –
A.4.1.5 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
A.4.2 Planning requirements
A.4.2.1 Safety
A.4.2.1.1 General
A.4.2.1.2 Electric safety
A.4.2.1.3 Functional safety
A.4.2.1.4 Intrinsic safety
Not applicable.
A.4.2.1.5 Safety of optical fibre communication systems
Not applicable.
A.4.2.2 Security
A.4.2.3 Environmental considerations and EMC
A.4.2.4 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
A.4.3 Network capabilities
A.4.3.1 Network topology
A.4.3.1.1 Common description
A.4.3.1.2 Basic physical topologies for passive networks
Modification:
CP 8/1 and CP 8/2 support bus and complex bus t-branch configurations (see A.4.3.1.5.2). A
pure star is not recommended since there is no defined trunk line ends for terminator
placement.
A.4.3.1.3 Basic physical topologies for active networks
Not applicable.
A.4.3.1.4 Combination of basic topologies
A.4.3.1.5 Specific requirements for CPs
Replacement:
A.4.3.1.5.1 Bus topology pass-through configuration
The bus topology pass-through configuration is implemented with a dedicated cable and pass-
through type connectors, one for each device as shown in Figure A.1.

– 14 – IEC 61784-5-8:2018 © IEC 2018

NOTE The minimum cable distance device-to-device is 20 cm.
Figure A.1 – Pass-through connector configuration
A.4.3.1.5.2 Bus t-branch topology
The bus t-branch topology is shown in Figure A.2. This is a modification of the bus topology in
that branch lines, which differ from spurs, may be added to a trunk segment.
The cable types may be mixed in the network, but shall remain consistent for a given branch
line or trunk segment.
NOTE 1 The minimum cable distance between the master or local station to another station depends on the
network configuration.
NOTE 2 The minimum cable distance between remote stations is 30 cm.
Figure A.2 – Bus t-branch topology
A.4.3.1.6 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
A.4.3.2 Network characteristics
A.4.3.2.1 General
A.4.3.2.2 Network characteristics for balanced cabling not based on Ethernet
Replacement:
Table A.1 provides values for CP 8/1 and CP 8/2 for the bus topology based on the template
given in IEC 61918:2018, Table 1.

IEC 61784-5-8:2018 © IEC 2018 – 15 –
Table A.1 – Basic network characteristics for balanced cabling not based on Ethernet
Characteristic CP 8/1, CP 8/2
Basic transmission technology Type 18
Segment length
Length / transmission speed
m
156 kbit/s 1 200
625 kbit/s 900
2,5 Mbit/s 400
5 Mbit/s 160
10 Mbit/s 100
Maximum capacity Max. no.
Devices / segment 64
Devices / network 64
Addition:
Table A.2 provides values for CP 8/1 and CP 8/2 for the bus t-branch topology.
Table A.2 – Bus t-branch network characteristics
Characteristic Transmission speed Comment
Length / transmission speed 156 kbit/s 625 kbit/s Higher speeds not supported
Maximum trunk segment length (m) 500 100 Does not include branch length
Maximum branch length (m) 8 8
Maximum overall branch length (m) 200 50 Total all branches combined
Maximum capacity
Maximum devices / branch segment 6 6

A.4.3.2.3 Network characteristics for balanced cabling based on Ethernet
Not applicable.
A.4.3.2.4 Network characteristics for optical fibre cabling
Not applicable.
A.4.3.2.5 Specific network characteristics
A.4.3.2.6 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
A.4.4 Selection and use of cabling components
A.4.4.1 Cable selection
A.4.4.1.1 Common description
A.4.4.1.2 Copper cables
A.4.4.1.2.1 Balanced cables for Ethernet-based CPs
Not applicable.
– 16 – IEC 61784-5-8:2018 © IEC 2018
A.4.4.1.2.2 Copper cables for non-Ethernet-based CPs
Addition:
Unshielded cables shall not be used with CP 8/1 and CP 8/2 networks.
Replacement:
Table A.3 provides values based on the template given in IEC 61918:2018
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