IEC 61784-5-6:2024
(Main)Industrial networks - Profiles - Part 5-6: Installation of fieldbuses - Installation profiles for CPF 6
Industrial networks - Profiles - Part 5-6: Installation of fieldbuses - Installation profiles for CPF 6
IEC 61784-5-6:2024 specifies the installation profiles for CPF 6 (INTERBUSTM)[1]. The installation profiles are specified in the annexes. These annexes are read in conjunction with IEC 61918:2018, IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024.
[1] INTERBUSTM is a trade name of INTERBUS Club, an independent organisation of users and vendors of INTERBUS products. 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 INTERBUS. Use of the trade name INTERBUS requires permission of the trade name holder.
Réseaux industriels - Profils - Partie 5-6: Installation des bus de terrain - Profils d’installation pour CPF 6
L’IEC 61784-5-6:2024 spécifie les profils d’installation pour la CPF 6 (INTERBUS™)[1]. Les profils d’installation sont spécifiés dans les annexes. Ces annexes sont à lire conjointement avec l’IEC 61918:2018, l’IEC 61918:2018/AMD1:2022 et l’IEC 61918:2018/AMD2:2024.
[1] INTERBUS™ est une marque de INTERBUS Club, organisation indépendante d’utilisateurs et de fournisseurs de produits INTERBUS. Cette information est donnée à l’intention des utilisateurs du présent document et ne signifie nullement que l’IEC approuve l’emploi du produit ainsi désigné. La conformité à ce profil n’exige pas l’utilisation de la marque INTERBUS. L’utilisation de la marque INTERBUS exige l’autorisation de son détenteur.
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IEC 61784-5-6 ®
Edition 5.0 2024-04
REDLINE VERSION
INTERNATIONAL
STANDARD
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Industrial communication networks – Profiles –
Part 5-6: Installation of fieldbuses – Installation profiles for CPF
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IEC 61784-5-6 ®
Edition 5.0 2024-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – Profiles –
Part 5-6: Installation of fieldbuses – Installation profiles for CPF
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040.40; 35.100.40 ISBN 978-2-8322-8689-0
– 2 – IEC 61784-5-6:2024 RLV © IEC 2024
CONTENTS
FOREWORD . 5
INTRODUCTION . 2
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 9
4 CPF 6: Overview of installation profiles . 10
5 Installation profile conventions. 10
6 Conformance to installation profiles . 10
Annex A (normative) CPF 6 Type 8 network specific installation profile . 12
A.1 Installation profile scope . 12
A.2 Normative references . 12
A.3 Installation profile terms, definitions, and abbreviated terms . 13
A.3.1 Terms and definitions . 13
A.3.2 Abbreviated terms . 14
A.3.3 Conventions for installation profiles . 14
A.4 Installation planning . 14
A.4.1 General . 14
A.4.2 Planning requirements . 15
A.4.3 Network capabilities . 16
A.4.4 Selection and use of cabling components . 20
A.4.5 Cabling planning documentation . 29
A.4.6 Verification of cabling planning specification . 29
A.5 Installation implementation. 29
A.5.1 General requirements . 29
A.5.2 Cable installation . 29
A.5.3 Connector installation . 32
A.5.4 Terminator installation . 34
A.5.5 Device installation . 34
A.5.6 Coding and labelling . 34
A.5.7 Earthing and bonding of equipment and devices and shield cabling . 34
A.5.8 As-implemented cabling documentation . 34
A.6 Installation verification and installation acceptance test . 34
A.6.1 General . 34
A.6.2 Installation verification . 34
A.6.3 Installation acceptance test . 35
A.7 Installation administration . 36
A.8 Installation maintenance and installation troubleshooting . 36
Annex B (normative) CPF 6 Ethernet network specific installation profile . 37
B.1 Installation profile scope . 37
B.2 Normative references . 37
B.3 Installation profile terms, definitions, and abbreviated terms . 38
B.3.1 Terms and definitions . 38
B.3.2 Abbreviated terms . 38
B.3.3 Conventions for installation profiles . 38
B.4 Installation planning . 38
B.4.1 General . 38
B.4.2 Planning requirements . 39
B.4.3 Network capabilities . 40
B.4.4 Selection and use of cabling components . 43
B.4.5 Cabling planning documentation . 49
B.4.6 Verification of cabling planning specification . 49
B.5 Installation implementation. 49
B.5.1 General requirements . 49
B.5.2 Cable installation . 49
B.5.3 Connector installation . 51
B.5.4 Terminator installation . 51
B.5.5 Device installation . 51
B.5.6 Coding and labelling . 51
B.5.7 Earthing and bonding of equipment and devices and shield cabling . 51
B.5.8 As-implemented cabling documentation . 52
B.6 Installation verification and installation acceptance test . 52
B.6.1 General . 52
B.6.2 Installation verification . 52
B.6.3 Installation acceptance test . 52
B.7 Installation administration . 52
B.8 Installation maintenance and installation troubleshooting . 52
Bibliography . 53
Figure 1 – Standards relationships . 8
Figure A.1 – Type 8 network structure example . 17
Figure A.2 – Example of a Type 8 network configuration . 18
Figure A.3 – Sub-D connector pin assignment . 32
Figure A.4 – M23 circular connector pin assignment . 33
Figure A.5 – M12 circular connector pin assignment . 33
Figure A.6 – Terminal connector at the device . 33
Figure B.1 – Terminal connector at the device . 51
Table A.1 – Basic network characteristics for balanced cabling not based on Ethernet . 19
Table A.2 – Network characteristics for optical fibre cabling . 20
Table A.3 – Information relevant to balanced cable: fixed cables . 21
Table A.4 – Information relevant to balanced cable: cords . 22
Table A.5 – Remote bus fibre optic cable length . 24
Table A.6 – Connectors for copper cabling CPs not based on Ethernet . 24
Table A.7 – Optical fibre connecting hardware . 25
Table A.8 – Relationship between FOC and fibre types (Type 8 networks) . 25
Table A.9 – Colour code for balanced cables used by Type 8 networks . 27
Table A.10 – Parameters for balanced cables . 29
Table A.11 – Parameters for silica optical fibre cables . 30
Table A.12 – Parameters for POF optical fibre cables . 30
Table A.13 – Parameters for hard clad silica optical fibre cables . 31
Table A.14 – Pin assignment of the terminal connector . 33
Table B.1 – Network characteristics for balanced cabling based on Ethernet . 41
– 4 – IEC 61784-5-6:2024 RLV © IEC 2024
Table B.2 – Network characteristics for optical fibre cabling . 42
Table B.3 – Information relevant to copper cable: fixed cables . 43
Table B.4 – Information relevant to copper cable: cords . 44
Table B.5 – Information relevant to optical fibre cables . 45
Table B.6 – Connectors for balanced cabling CPs based on Ethernet . 46
Table B.7 – Connectors for copper cabling CPs not based on Ethernet . 46
Table B.8 – Optical fibre connecting hardware . 47
Table B.9 – Relationship between FOC and fibre types (CP 6/2 Ethernet network) . 47
Table B.10 – Parameters for balanced cables . 49
Table B.11 – Parameters for silica optical fibre cables . 49
Table B.12 – Parameters for POF optical fibre cables . 50
Table B.13 – Parameters for hard clad silica optical fibre cables . 50
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
PROFILES –
Part 5-6: Installation of fieldbuses –
Installation profiles for CPF 6
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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
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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 shall not be held responsible for
identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 61784-5-6:2018. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
– 6 – IEC 61784-5-6:2024 RLV © IEC 2024
IEC 61784-5-6 has been prepared by subcommittee 65C: Industrial networks, of IEC technical
committee 65: Industrial process measurement, control and automation. It is an International
Standard.
This document is to be used in conjunction with IEC 61918:2018, IEC 61918:2018/AMD1:2022
and IEC 61918:2018/AMD2:2024.
This fifth edition cancels and replaces the fourth edition published in 2018. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with IEC 61918:2018, IEC 61918:2018/AMD1:2022 and
IEC 61918:2018/AMD2:2024;
b) addition of new content related to Single Pair Ethernet (SPE) in Annex B, Table B.1,
Table B.3, Table B.4, Table B.6.
The text of this International Standard is based on the following documents:
Draft Report on voting
65C/1283/FDIS 65C/1297/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 the 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.
A list of all parts of IEC 61784-5 series, under the general title Industrial 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 website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
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
This document is one of a series produced to facilitate the use of communication networks in
industrial control systems.
IEC 61918:2018, IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024 provide the
common requirements for the installation of communication networks in industrial control
systems. This installation profile document provides the installation profiles of the
communication profiles (CP) of a specific communication profile family (CPF) by stating which
requirements of IEC 61918 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 document IEC 61918 for the benefit of the persons
representing the roles in the fieldbus installation process as defined in IEC 61918 (planner,
installer, verification personnel, validation personnel, maintenance personnel, administration
personnel). By reading the installation profile in conjunction with IEC 61918, 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 document for each CPF (for example
IEC 61784-5-6 for CPF 6) allows readers to work with documents of a convenient size.
– 8 – IEC 61784-5-6:2024 RLV © IEC 2024
Figure 1 – Standards relationships
INDUSTRIAL COMMUNICATION NETWORKS –
PROFILES –
Part 5-6: Installation of fieldbuses –
Installation profiles for CPF 6
1 Scope
TM 1
This part of IEC 61784-5 specifies the installation profiles for CPF 6 (INTERBUS ) .
The installation profiles are specified in the annexes. These annexes are read in conjunction
with IEC 61918:2018, IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024.
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 61918:2018 , Industrial communication networks – Installation of communication networks
in industrial premises
IEC 61918:2018/AMD1:2022
IEC 61918:2018/AMD2:2024
The normative references of IEC 61918:2018, Clause 2, apply.
NOTE For profile specific normative references, see Clauses A.2, B.2.
3 Terms, definitions and abbreviated terms
For the purposes of this document, the terms, definitions and abbreviated terms given in
IEC 61918:2018, Clause 3, IEC 61918:2018/AMD1:2022, Clause 3, and Clauses A.3, B.3 of this
document apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
NOTE For profile specific terms, definitions and abbreviated terms see Clauses A.3 and B.3.
___________
1 TM
INTERBUS is a trade name of INTERBUS Club, an independent organisation of users and vendors of
INTERBUS products. 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 INTERBUS. Use of the trade name INTERBUS requires permission of the trade
name holder.
The normative references of IEC 61918:2018, Clause 2, IEC 61918:2018/AMD1:2022, Clause 2 and
IEC 61918:2018/AMD2:2024, Clause 2, apply.
– 10 – IEC 61784-5-6:2024 RLV © IEC 2024
4 CPF 6: Overview of installation profiles
CPF 6 consists of seven communication profiles (see IEC 61784-1:— for CP 6/1, CP 6/2,
CP 6/3, see IEC 61784-2:— for CP 6/4, CP 6/5, CP 6/6, see IEC 61784-3-6 for FSCP 6/7).
The CPF 6 Type 8 network (non-Ethernet-based) installation profile is specified in Annex A.
The CPF 6 Ethernet network specific installation profile is specified in Annex B.
5 Installation profile conventions
The numbering of the clauses and subclauses in the annexes of this document corresponds to
the numbering of IEC 61918:2018 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
(sub)clause numbering following the annex letter shall represent the corresponding (sub)clause
numbering of IEC 61918.
EXAMPLE "Subclause B.4.4" in IEC 61784-5-6 means that CP 6/2 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,
IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024. It may also include defined
additional specifications.
A statement of compliance with an installation profile of this document shall be stated as either
Compliance to with IEC 61784-5-6:— :2024 for CP 6/m or
Compliance to with IEC 61784-5-6 (Ed.45.0) for CP 6/m
where the name within the angle brackets < > is optional and the angle brackets are not to be
included. The m within CP 6/m shall be replaced by the profile number 1 to 2.
NOTE The name can be the name of the profile, for example INTERBUS.
If the name is a trade name, then the permission of the trade name holder shall be required.
Product documents 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.
– 12 – IEC 61784-5-6:2024 RLV © IEC 2024
Annex A
(normative)
CPF 6 Type 8 network specific installation profile
A.1 Installation profile scope
Addition:
This annex specifies the installation profile for CPF 6 Type 8 networks and the related
Communication Profiles:
• CP 6/1, CP 6/2, CP 6/3 – specified in IEC 61784-1;
• CP 6/4, CP 6/5, CP 6/6 – specified in IEC 61784-2;
• FSCP 6/7 – specified in IEC 61784-3-6.
A.2 Normative references
Addition:
IEC 60189-1:20072018, Low-frequency cables and wires with PVC insulation and PVC sheath
– Part 1: General test and measuring methods
IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
procedures – General guidance
IEC 61076-2-109 Connectors for electronic equipment – Product requirements –
Part 2-109: Circular connectors – Detail specification for connectors M 12 × 1 with screw-
locking, for data transmissions with frequencies up to 500 MHz
IEC 61076-3-123, Connectors for electronic equipment – Product requirements – Part 3-123:
Rectangular connectors – Detail specification for hybrid connectors for industrial environments,
for power supply and fibre optic data transmission, with push-pull locking
IEC 61156-1:2007 , Multicore and symmetrical pair/quad cables for digital communications –
Part 1: Generic specification
IEC 61156-5, Multicore and symmetrical pair/quad cables for digital communications – Part 5:
Symmetrical pair/quad cables with transmission characteristics up to 600 MHz – Horizontal floor
wiring – Sectional specification
IEC 61754-24-21, Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces – Part 24-21: Type SC-RJ connectors with protective housings based on
IEC 61076-3-106, variant 06
IEC 61754-27, Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces – Part 27: Type M12 FO connector family
___________
Under preparation. Stage at the time of publication: IEC/CDV 61076-3-123:2017.
A 2023 edition of this document exists but the listed edition applies.
A.3 Installation profile terms, definitions, and abbreviated terms
A.3.1 Terms and definitions
Addition:
A.3.1.8793
bus coupler
device that divides the Type 8 network into segments by opening the ring and integrating
another ring at this point
A.3.1.8894
local bus
ring segment of a Type 8 network with alternate media specifications, which is coupled to a
remote bus device via a bus coupler
A.3.1.8995
local bus device
device that operates as a slave on a local bus
A.3.1.9096
master
device that controls the data transfer on the Type 8 network and initiates the media access of
the slaves by sending messages and that constitutes the interface to the control system
A.3.1.9197
remote bus
ring segment of a network
A.3.1.9298
remote bus device
device operating as a slave on a remote bus
A.3.1.9399
remote bus link
connection of two remote bus devices
A.3.1.94100
ring segment
one section of a Type 8 network
A.3.1.95101
slave
device that accesses the medium only after it has been initiated by the preceding slave or
master
– 14 – IEC 61784-5-6:2024 RLV © IEC 2024
A.3.2 Abbreviated terms
Addition:
BC Bus coupler
COM Ground line
/DI Incoming interface: send data line –
Outgoing interface: receive data line –
DI Incoming interface: send data line +
Outgoing interface: receive data line +
/DO Incoming interface: receive data line –
Outgoing interface: send data line -
DO Incoming interface: receive data line +
Outgoing interface: send data line +
PELV Protective extra low voltage
POF Plastic optical fibre
SELV Safety extra low voltage
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
A.4.1.3 The planning process
A.4.1.4 Specific requirements for CPs
Not applicable.
A.4.1.5 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
Not applicable.
A.4.2 Planning requirements
A.4.2.1 Safety
A.4.2.1.1 General
A.4.2.1.2 Electrical safety
Addition:
The power distribution system shall comply with IEC 60364-1:2005, 312.2.1 TN-S systems, i.e.
earthed by bonding of enclosures with separated conductors for neutral (N) and protection earth
(PE). Otherwise, there are additional efforts necessary to avoid currents on the shield, i.e. an
AC earthed system on one end in a network with balanced cables or a network built with
FO-cables. For networks built with OF-cables, the power distribution system should comply with
IEC 60364-1:2005, 312.2.1 TN-S systems.
PELV is the default version for the power supply with extra-low voltage, but SELV may also be
used. Temporary connected devices shall be powered by PELV or SELV.
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
A.4.2.2 Security
A.4.2.3 Environmental considerations and EMC
A.4.2.3.1 Description methodology
A.4.2.3.2 Use of the described environment to produce a bill of material
Addition:
To make fieldbus installation work easier for inexperienced planners, the user shall determine
suitability of the components for the targeted environment through agreements with the
component providers. The planner shall also observe the related technical data from the active
devices. Depending on the expected environment the planner should define additional
requirements. Passive optical components in the harsh industrial environment should be
protected with suitable mitigation techniques or tested according to IEC 61753-1.
The planner shall take into account the mating or terminating interface of devices to be
connected to the fieldbus network.
The planner shall take care about the environmental conditions of the whole Type 8 network
and select suitable mitigation techniques to meet the respective requirements. Products
necessary for mitigation also shall be mentioned in the bill of material. Specific requirements
for generic cabling in accordance with ISO/IEC 11801-3.
A.4.2.4 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
Not applicable.
– 16 – IEC 61784-5-6:2024 RLV © IEC 2024
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
Not applicable.
A.4.3.1.3 Basic physical topologies for active networks
Replacement:
For Type 8 networks only the ring topology specified in IEC 61158-2 shall be used.
NOTE The Type 8 ring topology is achieved with specific cables and resembles a linear tree topology. Further
explanation of the physical layer of Type 8 networks can be found in IEC 61158-2.
A.4.3.1.4 Combination of basic topologies
Replacement:
The combination of several topologies may also be used according to A.4.3.1.5.
A.4.3.1.5 Specific requirements for CPs
Addition:
The general structure is a ring topology with special cables to build tree like configurations. Bus
couplers allow a branch from the remote bus to the local bus or to a further remote bus.
Figure A.1 shows a Type 8 network structure example. There is no limit for the sub-leveling of
remote buses. Only one local bus can be connected to a remote bus. A maximum of 63 devices
can be connected to one local bus.
Key
w outgoing interface of the master
a incoming interface of a slave
w1 first outgoing interface of a slave
w2 second outgoing interface of a slave
The ring segment level is increased when the devices are connected to w1.
Figure A.1 – Type 8 network structure example
The remote bus link length (i.e. the cable between two devices on a remote bus link) shall be
between 0 m and the maximum length for the used bit rate (see Table A.1). The local bus link
length (i.e. the cable between two devices on a local bus link) shall be between 0 m and 10 m.
Figure A.2 shows a Type 8 network configuration example with bus length indications.
– 18 – IEC 61784-5-6:2024 RLV © IEC 2024
Figure A.2 – Example of a Type 8 network configuration
A.4.3.1.6 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
Not applicable.
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 based on the template given in IEC 61918:2018. Table 1.
Table A.1 – Basic network characteristics for balanced cabling not based on Ethernet
Characteristic Type 8 network
Basic transmission technology Type 8
Segment length
Length / transmission speed
m
a
500 kbit/s
400 m between nodes
a
2 Mbit/s
150 m between nodes
a
8 Mbit/s
125 m between nodes
a
16 Mbit/s
100 m between nodes
Maximum capacity Max. No.
b
Devices / segment
Remote bus: 256
b
Local bus: 63
b
Number of devices / networks
Remote bus: 256
b
Local bus: 256
a
The maximum length of a Type 8 network depends on the number of devices
supported by the master and could be calculated by multiplication of link length
by the number of devices.
b
The maximum number of all devices in one Type 8 network is limited to 256.
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
Replacement:
Table A.2 provides values based on the template given in IEC 61918:2018, Table 3.
– 20 – IEC 61784-5-6:2024 RLV © IEC 2024
Table A.2 – Network characteristics for optical fibre cabling
Type 8 network
Optical fibre type Description
Single mode silica Bandwidth (MHz) or equivalent at λ (nm) 1 310 nm
Minimum length (m) 0
a
15 000
Maximum length (m)
Maximum channel Insertion loss/optical power See IEC 61158-2
budget (dB)
Connecting hardware See A.4.4.2.5
Multimode silica Modal bandwidth (MHz × km) at λ (nm) 1 300 nm
Minimum length (m) 0
a
3 000
Maximum length (m)
Maximum channel insertion loss/optical power See IEC 61158-2
budget (dB)
Connecting hardware See A.4.4.2.5
POF Modal bandwidth 650 nm
(MHz × 100 m) at λ (nm)
Minimum length (m) 0
a
Maximum length (m)
Maximum channel insertion loss/optical power See IEC 61158-2
budget (dB)
Connecting hardware See A.4.4.2.5
Hard clad silica Modal bandwidth (MHz × km) at λ (nm) 650 nm
Minimum length (m) 0
a
Maximum length (m)
Maximum channel insertion loss/optical power See IEC 61158-2
budget (dB)
Connecting hardware See A.4.4.2.5
a
This value is reduced by connections, splices and bends in accordance with IEC 61918:2018, Formula (1) in
4.4.3.4.1.
A.4.3.2.5 Specific network characteristics
Not applicable.
A.4.3.2.6 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
Not applicable.
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.
A.4.4.1.2.2 Copper cables for non-Ethernet-based CPs
Replacement:
Table A.3 and Table A.4 provide values based on the template given in IEC 61918:2018,
Table 4 and Table 5.
Table A.3 – Information relevant to balanced cable: fixed cables
Characteristic Type 8 network
Nominal impedance of cable (tolerance) 120 Ω ± 20 % at f = 0,064 MHz
100 Ω ± 15 Ω at f > 1 MHz
Test method IEC 61156-1:2007, 6.3.1
DCR of conductors max. 9,6 Ω / 100 m
Test method IEC 60189-1:2007, 8.1
DCR of shield -
Number of conductors 3 × 2, twisted pair
Shielding Yes
Colour code for conductor DO = yellow
/DO = green
DI = grey
/DI = pink
COM = brown
Jacket colour requirements Green, RAL 6017
Jacket material Application dependant
Resistance to harsh environment (e.g. UV, oil resist, LS0H) Cable types for different applications available
Agency ratings Cable types with different ratings available
Cross section
Min. 0,20 mm
Dielectric strength 1 000 V RMS, 1 min
– Conductor/conductor 1 000 V RMS, 1 min
– Conductor/shield Test method IEC 60189-1:20072018, 8.2
Insulation resistance Min 150 M Ω for a cable of 1 km in length
(after dielectric strength test) Test method IEC 60189-1:20072018, 8.3
Maximum transfer impedance
– at 30 MHz 250 mΩ /m
Mutual capacitance (at 800 Hz) Max. 60 nF for a cable of 1 km in length
Test method IEC 60189-1:20072018, 8.4
Min. near end cross talk loss
(NEXT) for a cable of 100 m
– at 0,772 MHz 61 dB
– at 1 MHz 59 dB
– at 2 MHz 55 dB
– at 4 MHz 50 dB
– at 8 MHz 46 dB
– at 10 MHz 44 dB
– at 16 MHz 41 dB
– at 20 MHz 40 dB
Test method IEC 61156-1:2007, 6.3.5
– 22 – IEC 61784-5-6:2024 RLV © IEC 2024
Characteristic Type 8 network
Max. attenuation for a cable of 100 m
– at 0,256 MHz 1,5 dB
– at 0,772 MHz 2,4 dB
– at 1 MHz 2,7 dB
– at 4 MHz 5,2 dB
– at 10 MHz 8,4 dB
– at 16 MHz 11,2 dB
– at 20 MHz 11,9 dB
Test method IEC 61156-1:2007, 6.3.3
Table A.4 – Information relevant to balanced cable: cords
Characteristic Type 8 network
Nominal impedance of cable (tolerance) 120 Ω ± 20 % at f = 0,064 MHz
100 Ω ± 15 Ω at f > 1 MHz
Test method IEC 61156-1:2007, 6.3.1
DCR of conductors Max. 9,6 Ω / 100 m
Test method IEC 60189-1:2007, 8.1
DCR of shield -
Number of conductors 3 × 2, twisted pair
Shielding Yes
Colour code for conductor DO = yellow
/DO = green
DI = grey
/DI = pink
COM = brown
Jacket colour requirements Green, RAL 6017
Jacket material Application dependant
Resistance to harsh environment (e.g., UV, oil resist, LS0H) Cable types for different applications available
Agency ratings Cable types with different ratings available
Cross section
min. 0,20 mm
Dielectric strength 1 000 V RMS, 1 min
– Conductor/conductor 1 000 V RMS, 1 min
– Conductor/shield Test method IEC 60189-1:20072018, 8.2
Insulation resistance Min 150 M Ω for a cable of 1 km in length
(After dielectric strength test) Test method IEC 60189-1:20072018, 8.3
Maximum transfer impedance
– at 30 MHz 250 mΩ / m
Mutual capacitance (at 800 Hz) Max. 60 nF for a cable of 1 km in length
Test method IEC 60189-1:20072018, 8.4
Characteristic Type 8 network
Min. near end cross talk loss
...
IEC 61784-5-6 ®
Edition 5.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial networks – Profiles –
Part 5-6: Installation of fieldbuses – Installation profiles for CPF 6
Réseaux industriels – Profils –
Partie 5-6: Installation des bus de terrain – Profils d’installation pour CPF 6
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IEC 61784-5-6 ®
Edition 5.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial networks – Profiles –
Part 5-6: Installation of fieldbuses – Installation profiles for CPF 6
Réseaux industriels – Profils –
Partie 5-6: Installation des bus de terrain – Profils d’installation pour CPF 6
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40, 35.100.40 ISBN 978-2-8322-8404-9
– 2 – IEC 61784-5-6:2024 © IEC 2024
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
4 CPF 6: Overview of installation profiles . 9
5 Installation profile conventions. 9
6 Conformance to installation profiles . 9
Annex A (normative) CPF 6 Type 8 network specific installation profile . 11
A.1 Installation profile scope . 11
A.2 Normative references . 11
A.3 Installation profile terms, definitions, and abbreviated terms . 11
A.3.1 Terms and definitions . 11
A.3.2 Abbreviated terms . 12
A.3.3 Conventions for installation profiles . 13
A.4 Installation planning . 13
A.4.1 General . 13
A.4.2 Planning requirements . 13
A.4.3 Network capabilities . 14
A.4.4 Selection and use of cabling components . 18
A.4.5 Cabling planning documentation . 27
A.4.6 Verification of cabling planning specification . 27
A.5 Installation implementation. 27
A.5.1 General requirements . 27
A.5.2 Cable installation . 27
A.5.3 Connector installation . 30
A.5.4 Terminator installation . 32
A.5.5 Device installation . 32
A.5.6 Coding and labelling . 32
A.5.7 Earthing and bonding of equipment and devices and shield cabling . 32
A.5.8 As-implemented cabling documentation . 32
A.6 Installation verification and installation acceptance test . 32
A.6.1 General . 32
A.6.2 Installation verification . 32
A.6.3 Installation acceptance test . 33
A.7 Installation administration . 34
A.8 Installation maintenance and installation troubleshooting . 34
Annex B (normative) CPF 6 Ethernet network specific installation profile . 35
B.1 Installation profile scope . 35
B.2 Normative references . 35
B.3 Installation profile terms, definitions, and abbreviated terms . 36
B.3.1 Terms and definitions . 36
B.3.2 Abbreviated terms . 36
B.3.3 Conventions for installation profiles . 36
B.4 Installation planning . 36
B.4.1 General . 36
B.4.2 Planning requirements . 36
B.4.3 Network capabilities . 37
B.4.4 Selection and use of cabling components . 40
B.4.5 Cabling planning documentation . 46
B.4.6 Verification of cabling planning specification . 46
B.5 Installation implementation. 46
B.5.1 General requirements . 46
B.5.2 Cable installation . 46
B.5.3 Connector installation . 48
B.5.4 Terminator installation . 48
B.5.5 Device installation . 48
B.5.6 Coding and labelling . 48
B.5.7 Earthing and bonding of equipment and devices and shield cabling . 48
B.5.8 As-implemented cabling documentation . 48
B.6 Installation verification and installation acceptance test . 49
B.6.1 General . 49
B.6.2 Installation verification . 49
B.6.3 Installation acceptance test . 49
B.7 Installation administration . 49
B.8 Installation maintenance and installation troubleshooting . 49
Bibliography . 50
Figure 1 – Standards relationships . 7
Figure A.1 – Type 8 network structure example . 15
Figure A.2 – Example of a Type 8 network configuration . 16
Figure A.3 – Sub-D connector pin assignment . 30
Figure A.4 – M23 circular connector pin assignment . 31
Figure A.5 – M12 circular connector pin assignment . 31
Figure A.6 – Terminal connector at the device . 31
Figure B.1 – Terminal connector at the device . 48
Table A.1 – Basic network characteristics for balanced cabling not based on Ethernet . 17
Table A.2 – Network characteristics for optical fibre cabling . 18
Table A.3 – Information relevant to balanced cable: fixed cables . 19
Table A.4 – Information relevant to balanced cable: cords . 20
Table A.5 – Remote bus fibre optic cable length . 22
Table A.6 – Connectors for copper cabling CPs not based on Ethernet . 22
Table A.7 – Optical fibre connecting hardware . 23
Table A.8 – Relationship between FOC and fibre types (Type 8 networks) . 23
Table A.9 – Colour code for balanced cables used by Type 8 networks . 25
Table A.10 – Parameters for balanced cables . 27
Table A.11 – Parameters for silica optical fibre cables . 28
Table A.12 – Parameters for POF optical fibre cables . 28
Table A.13 – Parameters for hard clad silica optical fibre cables . 29
Table A.14 – Pin assignment of the terminal connector . 31
Table B.1 – Network characteristics for balanced cabling based on Ethernet . 38
– 4 – IEC 61784-5-6:2024 © IEC 2024
Table B.2 – Network characteristics for optical fibre cabling . 39
Table B.3 – Information relevant to copper cable: fixed cables . 40
Table B.4 – Information relevant to copper cable: cords . 41
Table B.5 – Information relevant to optical fibre cables . 42
Table B.6 – Connectors for balanced cabling CPs based on Ethernet . 43
Table B.7 – Connectors for copper cabling CPs not based on Ethernet . 43
Table B.8 – Optical fibre connecting hardware . 44
Table B.9 – Relationship between FOC and fibre types (CP 6/2 Ethernet network) . 44
Table B.10 – Parameters for balanced cables . 46
Table B.11 – Parameters for silica optical fibre cables . 46
Table B.12 – Parameters for POF optical fibre cables . 47
Table B.13 – Parameters for hard clad silica optical fibre cables . 47
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL NETWORKS –
PROFILES –
Part 5-6: Installation of fieldbuses –
Installation profiles for CPF 6
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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identifying any or all such patent rights.
IEC 61784-5-6 has been prepared by subcommittee 65C: Industrial networks, of IEC technical
committee 65: Industrial process measurement, control and automation. It is an International
Standard.
This document is to be used in conjunction with IEC 61918:2018, IEC 61918:2018/AMD1:2022
and IEC 61918:2018/AMD2:2024.
This fifth edition cancels and replaces the fourth edition published in 2018. This edition
constitutes a technical revision.
– 6 – IEC 61784-5-6:2024 © IEC 2024
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with IEC 61918:2018, IEC 61918:2018/AMD1:2022 and
IEC 61918:2018/AMD2:2024;
b) addition of new content related to Single Pair Ethernet (SPE) in Annex B, Table B.1,
Table B.3, Table B.4, Table B.6.
The text of this International Standard is based on the following documents:
Draft Report on voting
65C/1283/FDIS 65C/1297/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 the 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.
A list of all parts of IEC 61784-5 series, under the general title Industrial 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 website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
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
This document is one of a series produced to facilitate the use of communication networks in
industrial control systems.
IEC 61918:2018, IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024 provide the
common requirements for the installation of communication networks in industrial control
systems. This installation profile document provides the installation profiles of the
communication profiles (CP) of a specific communication profile family (CPF) by stating which
requirements of IEC 61918 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 document IEC 61918 for the benefit of the persons
representing the roles in the fieldbus installation process as defined in IEC 61918 (planner,
installer, verification personnel, validation personnel, maintenance personnel, administration
personnel). By reading the installation profile in conjunction with IEC 61918, 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 document for each CPF (for example
IEC 61784-5-6 for CPF 6) allows readers to work with documents of a convenient size.
Figure 1 – Standards relationships
– 8 – IEC 61784-5-6:2024 © IEC 2024
INDUSTRIAL NETWORKS –
PROFILES –
Part 5-6: Installation of fieldbuses –
Installation profiles for CPF 6
1 Scope
TM 1
This part of IEC 61784-5 specifies the installation profiles for CPF 6 (INTERBUS ) .
The installation profiles are specified in the annexes. These annexes are read in conjunction
with IEC 61918:2018, IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024.
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 61918:2018 , Industrial communication networks – Installation of communication networks
in industrial premises
IEC 61918:2018/AMD1:2022
IEC 61918:2018/AMD2:2024
NOTE For profile specific normative references, see Clauses A.2, B.2.
3 Terms, definitions and abbreviated terms
For the purposes of this document, the terms, definitions and abbreviated terms given in
IEC 61918:2018, Clause 3, IEC 61918:2018/AMD1:2022, Clause 3, and Clauses A.3, B.3 of this
document apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
___________
1 TM
INTERBUS is a trade name of INTERBUS Club, an independent organisation of users and vendors of
INTERBUS products. 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 INTERBUS. Use of the trade name INTERBUS requires permission of the trade
name holder.
The normative references of IEC 61918:2018, Clause 2, IEC 61918:2018/AMD1:2022, Clause 2 and
IEC 61918:2018/AMD2:2024, Clause 2, apply.
4 CPF 6: Overview of installation profiles
CPF 6 consists of seven communication profiles (see IEC 61784-1:— for CP 6/1, CP 6/2,
CP 6/3, see IEC 61784-2:— for CP 6/4, CP 6/5, CP 6/6, see IEC 61784-3-6 for FSCP 6/7).
The CPF 6 Type 8 network (non-Ethernet-based) installation profile is specified in Annex A.
The CPF 6 Ethernet network specific installation profile is specified in Annex B.
5 Installation profile conventions
The numbering of the clauses and subclauses in the annexes of this document corresponds to
the numbering of IEC 61918:2018 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
(sub)clause numbering following the annex letter shall represent the corresponding (sub)clause
numbering of IEC 61918.
EXAMPLE "Subclause B.4.4" in IEC 61784-5-6 means that CP 6/2 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,
IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024. It may also include defined
additional specifications.
– 10 – IEC 61784-5-6:2024 © IEC 2024
A statement of compliance with an installation profile of this document shall be state as either
Compliance with IEC 61784-5-6:2024 for CP 6/m or
Compliance with IEC 61784-5-6 (Ed.5.0) for CP 6/m
where the name within the angle brackets < > is optional and the angle brackets are not to be
included. The m within CP 6/m shall be replaced by the profile number 1 to 2.
NOTE The name can be the name of the profile, for example INTERBUS.
If the name is a trade name, then the permission of the trade name holder shall be required.
Product documents shall not include any conformity assessment aspects (including quality
management provisions), neither normative nor informative, other than provisions for product
testing (evaluation and examination).
Annex A
(normative)
CPF 6 Type 8 network specific installation profile
A.1 Installation profile scope
Addition:
This annex specifies the installation profile for CPF 6 Type 8 networks and the related
Communication Profiles:
• CP 6/1, CP 6/2, CP 6/3 – specified in IEC 61784-1;
• CP 6/4, CP 6/5, CP 6/6 – specified in IEC 61784-2;
• FSCP 6/7 – specified in IEC 61784-3-6.
A.2 Normative references
Addition:
IEC 60189-1:2018, Low-frequency cables and wires with PVC insulation and PVC sheath –
Part 1: General test and measuring methods
IEC 60794-1-2, Optical fibre cables – Part 1-2: Generic specification – Basic optical cable test
procedures – General guidance
IEC 61076-3-123, Connectors for electronic equipment – Product requirements – Part 3-123:
Rectangular connectors – Detail specification for hybrid connectors for industrial environments,
for power supply and fibre optic data transmission, with push-pull locking
IEC 61156-1:2007 , Multicore and symmetrical pair/quad cables for digital communications –
Part 1: Generic specification
IEC 61754-24-21, Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces – Part 24-21: Type SC-RJ connectors with protective housings based on
IEC 61076-3-106, variant 06
IEC 61754-27, Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces – Part 27: Type M12 FO connector family
A.3 Installation profile terms, definitions, and abbreviated terms
A.3.1 Terms and definitions
Addition:
A.3.1.93
bus coupler
device that divides the Type 8 network into segments by opening the ring and integrating
another ring at this point
___________
A 2023 edition of this document exists but the listed edition applies.
– 12 – IEC 61784-5-6:2024 © IEC 2024
A.3.1.94
local bus
ring segment of a Type 8 network with alternate media specifications, which is coupled to a
remote bus device via a bus coupler
A.3.1.95
local bus device
device that operates as a slave on a local bus
A.3.1.96
master
device that controls the data transfer on the Type 8 network and initiates the media access of
the slaves by sending messages and that constitutes the interface to the control system
A.3.1.97
remote bus
ring segment of a network
A.3.1.98
remote bus device
device operating as a slave on a remote bus
A.3.1.99
remote bus link
connection of two remote bus devices
A.3.1.100
ring segment
one section of a Type 8 network
A.3.1.101
slave
device that accesses the medium only after it has been initiated by the preceding slave or
master
A.3.2 Abbreviated terms
Addition:
BC Bus coupler
COM Ground line
/DI Incoming interface: send data line –
Outgoing interface: receive data line –
DI Incoming interface: send data line +
Outgoing interface: receive data line +
/DO Incoming interface: receive data line –
Outgoing interface: send data line -
DO Incoming interface: receive data line +
Outgoing interface: send data line +
PELV Protective extra low voltage
POF Plastic optical fibre
SELV Safety extra low voltage
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
A.4.1.3 The planning process
A.4.1.4 Specific requirements for CPs
Not applicable.
A.4.1.5 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
Not applicable.
A.4.2 Planning requirements
A.4.2.1 Safety
A.4.2.1.1 General
A.4.2.1.2 Electrical safety
Addition:
The power distribution system shall comply with IEC 60364-1:2005, 312.2.1 TN-S systems, i.e.
earthed by bonding of enclosures with separated conductors for neutral (N) and protection earth
(PE). Otherwise, there are additional efforts necessary to avoid currents on the shield, i.e. an
AC earthed system on one end in a network with balanced cables or a network built with
FO-cables. For networks built with OF-cables, the power distribution system should comply with
IEC 60364-1:2005, 312.2.1 TN-S systems.
PELV is the default version for the power supply with extra-low voltage, but SELV may also be
used. Temporary connected devices shall be powered by PELV or SELV.
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
– 14 – IEC 61784-5-6:2024 © IEC 2024
A.4.2.2 Security
A.4.2.3 Environmental considerations and EMC
A.4.2.3.1 Description methodology
A.4.2.3.2 Use of the described environment to produce a bill of material
Addition:
To make fieldbus installation work easier for inexperienced planners, the user shall determine
suitability of the components for the targeted environment through agreements with the
component providers. The planner shall also observe the related technical data from the active
devices. Depending on the expected environment the planner should define additional
requirements. Passive optical components in the harsh industrial environment should be
protected with suitable mitigation techniques or tested according to IEC 61753-1.
The planner shall take into account the mating or terminating interface of devices to be
connected to the fieldbus network.
The planner shall take care about the environmental conditions of the whole Type 8 network
and select suitable mitigation techniques to meet the respective requirements. Specific
requirements for generic cabling in accordance with ISO/IEC 11801-3.
A.4.2.4 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
Not applicable.
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
Not applicable.
A.4.3.1.3 Basic physical topologies for active networks
Replacement:
For Type 8 networks only the ring topology specified in IEC 61158-2 shall be used.
NOTE The Type 8 ring topology is achieved with specific cables and resembles a linear tree topology. Further
explanation of the physical layer of Type 8 networks can be found in IEC 61158-2.
A.4.3.1.4 Combination of basic topologies
Replacement:
The combination of several topologies may also be used according to A.4.3.1.5.
A.4.3.1.5 Specific requirements for CPs
Addition:
The general structure is a ring topology with special cables to build tree like configurations. Bus
couplers allow a branch from the remote bus to the local bus or to a further remote bus.
Figure A.1 shows a Type 8 network structure example. There is no limit for the sub-leveling of
remote buses. Only one local bus can be connected to a remote bus. A maximum of 63 devices
can be connected to one local bus.
Key
w outgoing interface of the master
a incoming interface of a slave
w1 first outgoing interface of a slave
w2 second outgoing interface of a slave
The ring segment level is increased when the devices are connected to w1.
Figure A.1 – Type 8 network structure example
The remote bus link length (i.e. the cable between two devices on a remote bus link) shall be
between 0 m and the maximum length for the used bit rate (see Table A.1). The local bus link
length (i.e. the cable between two devices on a local bus link) shall be between 0 m and 10 m.
Figure A.2 shows a Type 8 network configuration example with bus length indications.
– 16 – IEC 61784-5-6:2024 © IEC 2024
Figure A.2 – Example of a Type 8 network configuration
A.4.3.1.6 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
Not applicable.
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 based on the template given in IEC 61918:2018. Table 1.
Table A.1 – Basic network characteristics for balanced cabling not based on Ethernet
Characteristic Type 8 network
Basic transmission technology Type 8
Segment length
Length / transmission speed
m
a
500 kbit/s
400 m between nodes
a
2 Mbit/s
150 m between nodes
a
8 Mbit/s
125 m between nodes
a
16 Mbit/s
100 m between nodes
Maximum capacity Max. No.
b
Devices / segment
Remote bus: 256
b
Local bus: 63
b
Number of devices / networks
Remote bus: 256
b
Local bus: 256
a
The maximum length of a Type 8 network depends on the number of devices
supported by the master and could be calculated by multiplication of link length
by the number of devices.
b
The maximum number of all devices in one Type 8 network is limited to 256.
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
Replacement:
Table A.2 provides values based on the template given in IEC 61918:2018, Table 3.
– 18 – IEC 61784-5-6:2024 © IEC 2024
Table A.2 – Network characteristics for optical fibre cabling
Type 8 network
Optical fibre type Description
Single mode silica Bandwidth (MHz) or equivalent at λ (nm) 1 310 nm
Minimum length (m) 0
a
15 000
Maximum length (m)
Maximum channel Insertion loss/optical power See IEC 61158-2
budget (dB)
Connecting hardware See A.4.4.2.5
Multimode silica Modal bandwidth (MHz × km) at λ (nm) 1 300 nm
Minimum length (m) 0
a
3 000
Maximum length (m)
Maximum channel insertion loss/optical power See IEC 61158-2
budget (dB)
Connecting hardware See A.4.4.2.5
POF Modal bandwidth 650 nm
(MHz × 100 m) at λ (nm)
Minimum length (m) 0
a
Maximum length (m)
Maximum channel insertion loss/optical power See IEC 61158-2
budget (dB)
Connecting hardware See A.4.4.2.5
Hard clad silica Modal bandwidth (MHz × km) at λ (nm) 650 nm
Minimum length (m) 0
a
Maximum length (m)
Maximum channel insertion loss/optical power See IEC 61158-2
budget (dB)
Connecting hardware See A.4.4.2.5
a
This value is reduced by connections, splices and bends in accordance with IEC 61918:2018, Formula (1) in
4.4.3.4.1.
A.4.3.2.5 Specific network characteristics
Not applicable.
A.4.3.2.6 Specific requirements for generic cabling in accordance with
ISO/IEC 11801-3
Not applicable.
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.
A.4.4.1.2.2 Copper cables for non-Ethernet-based CPs
Replacement:
Table A.3 and Table A.4 provide values based on the template given in IEC 61918:2018,
Table 4 and Table 5.
Table A.3 – Information relevant to balanced cable: fixed cables
Characteristic Type 8 network
Nominal impedance of cable (tolerance) 120 Ω ± 20 % at f = 0,064 MHz
100 Ω ± 15 Ω at f > 1 MHz
DCR of conductors max. 9,6 Ω / 100 m
DCR of shield -
Number of conductors 3 × 2, twisted pair
Shielding Yes
Colour code for conductor DO = yellow
/DO = green
DI = grey
/DI = pink
COM = brown
Jacket colour requirements Green, RAL 6017
Jacket material Application dependant
Resistance to harsh environment (e.g. UV, oil resist, LS0H) Cable types for different applications available
Agency ratings Cable types with different ratings available
Cross section
Min. 0,20 mm
Dielectric strength 1 000 V RMS, 1 min
– Conductor/conductor 1 000 V RMS, 1 min
– Conductor/shield Test method IEC 60189-1:2018, 8.2
Insulation resistance Min 150 M Ω for a cable of 1 km in length
(after dielectric strength test) Test method IEC 60189-1:2018, 8.3
Maximum transfer impedance
– at 30 MHz 250 mΩ /m
Mutual capacitance (at 800 Hz) Max. 60 nF for a cable of 1 km in length
Test method IEC 60189-1:2018, 8.4
Min. near end cross talk loss
(NEXT) for a cable of 100 m
– at 0,772 MHz 61 dB
– at 1 MHz 59 dB
– at 2 MHz 55 dB
– at 4 MHz 50 dB
– at 8 MHz 46 dB
– at 10 MHz 44 dB
– at 16 MHz 41 dB
– at 20 MHz 40 dB
Test method IEC 61156-1:2007, 6.3.5
– 20 – IEC 61784-5-6:2024 © IEC 2024
Characteristic Type 8 network
Max. attenuation for a cable of 100 m
– at 0,256 MHz 1,5 dB
– at 0,772 MHz 2,4 dB
– at 1 MHz 2,7 dB
– at 4 MHz 5,2 dB
– at 10 MHz 8,4 dB
– at 16 MHz 11,2 dB
– at 20 MHz 11,9 dB
Test method IEC 61156-1:2007, 6.3.3
Table A.4 – Information relevant to balanced cable: cords
Characteristic Type 8 netw
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