Information technology - Generic cabling systems - Part 3: Industrial spaces

This standard specifies generic cabling to serve the automation islands in industrial premises, or industrial spaces within other types of building. It covers balanced cabling and optical fibre cabling. This standard specifies directly or via reference to EN 50173-1 the: - structure and minimum configuration for generic cabling within industrial spaces; - interfaces at the telecommunications outlet (TO); - performance requirements for cabling links and channels; - implementation requirements and options; - performance requirements for cabling components; - conformance requirements and verification procedures. This standard has taken into account requirements specified in application standards listed in EN 50173-1. Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this standard and are covered by other standards and regulations. However, information given in this standard can be of assistance in meeting these standards and regulations.

Informationstechnik - Anwendungsneutrale Kommunikationskabelanlagen - Teil 3: Industriell genutzte Bereiche

Diese Norm legt anwendungsneutrale Kommunikationskabelanlagen für die Versorgung von Automations-inseln an industriell genutzten Standorten oder in industriell genutzten Bereichen innerhalb anderer Gebäude-arten fest. Sie behandelt symmetrische Kupferverkabelung und Lichtwellenleiterverkabelung. Diese Norm legt entweder direkt oder mittels Verweisung auf EN 50173 1 Folgendes fest: – Struktur und Mindestkonfiguration für anwendungsneutrale Kommunikationskabelanlagen in industriell genutzten Bereichen; – Schnittstellen am informationstechnischen Anschluss (TA); – Anforderungen an das Leistungsvermögen von Verkabelungs- und Übertragungsstrecken; – Anforderungen an und Optionen für Ausführungen; – Anforderungen an das Leistungsvermögen von Verkabelungskomponenten; – Konformitätsanforderungen und Verifizierungsverfahren. In dieser Norm wurden Anforderungen berücksichtigt, die in den in EN 50173 1 aufgeführten Anwendungs-normen festgelegt werden. Anforderungen an Sicherheit und elektromagnetische Verträglichkeit (EMV) gehören nicht zum Anwendungs-bereich dieser Norm und werden von anderen Normen und Vorschriften behandelt. Jedoch können die in dieser Norm bereitgestellten Informationen bei der Einhaltung dieser Normen und Vorschriften hilfreich sein.

Technologies de l'information - Systèmes de câblage générique - Partie 3: Espaces industriels

Informacijska tehnologija - Univerzalni sistemi polaganja kablov - 3. del: Industrijska okolja

Ta standard določa univerzalne kable, namenjene za uporabo v avtomatiziranih otokih industrijskih prostorov ali industrijskih okoljih znotraj drugih vrst stavb.
Obravnava simetrične kable in kable z optičnimi vlakni.
Ta standard neposredno ali s sklicem na standard EN 50173-1 določa:
– strukturo in minimalno konfiguracijo univerzalnih kablov v industrijskih okoljih;
– vmesnike na telekomunikacijski vtičnici (TO);
– zahteve za zmogljivost kabelskih povezav in kanalov;
– zahteve in možnosti za izvedbo;
– zahteve za zmogljivost kabelskih komponent;
– zahteve za skladnost in postopke preverjanja.
Ta standard upošteva zahteve, določene v standardih za uporabo, navedenih v standardu EN 50173-1.
Varnostne zahteve in zahteve za elektromagnetno združljivost (EMC) ne spadajo na področje uporabe tega standarda ter so obravnavane v drugih standardih in predpisih. Vendar so lahko informacije iz tega standarda v pomoč pri izpolnjevanju teh standardov in predpisov.

General Information

Status
Published
Publication Date
14-Jun-2018
Current Stage
6060 - Document made available
Due Date
26-Feb-2019

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SLOVENSKI STANDARD
SIST EN 50173-3:2018
01-oktober-2018
1DGRPHãþD
SIST EN 50173-3:2008
SIST EN 50173-3:2008/A1:2011
SIST EN 50173-3:2008/A1:2011/AC:2011
Informacijska tehnologija - Univerzalni sistemi polaganja kablov - 3. del:
Industrijska okolja
Information technology - Generic cabling systems - Part 3: Industrial spaces
Informationstechnik - Anwendungsneutrale Kommunikationskabelanlagen - Teil 3:
Industriell genutzte Bereiche

Technologies de l'information - Systèmes de câblage générique - Partie 3: Espaces

industriels
Ta slovenski standard je istoveten z: EN 50173-3:2018
ICS:
33.040.50 Vodi, zveze in tokokrogi Lines, connections and
circuits
35.110 Omreževanje Networking
SIST EN 50173-3:2018 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50173-3:2018
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SIST EN 50173-3:2018
EUROPEAN STANDARD EN 50173-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2018
ICS 35.110 Supersedes EN 50173-3:2007
English Version
Information technology - Generic cabling systems - Part 3:
Industrial spaces

Technologies de l'information - Systèmes de câblage Informationstechnik - Anwendungsneutrale

générique - Partie 3: Espaces industriels Kommunikationskabelanlagen - Teil 3: Industriell genutzte

Bereiche

This European Standard was approved by CENELEC on 2018-03-19. 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 50173-3:2018 E
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
Contents Page
European foreword 6
Introduction 7
1 Scope and conformance 11
1.1 Scope 11
1.2 Conformance 11
2 Normative references 12
3 Terms, definitions and abbreviations 12
3.1 Terms and definitions 12
3.2 Abbreviations 13
4 Structure of the generic cabling system in industrial spaces 13
4.1 General 13
4.2 Functional elements 14
4.3 Structure and hierarchy 14
4.4 Cabling subsystems 17
4.4.1 Industrial space cabling subsystems 17
4.4.2 Associated cabling subsystems 18
4.5 Design objectives 18
4.5.1 General 18
4.5.2 Intermediate cabling 19
4.5.3 Floor cabling 20
4.5.4 Backbone cabling 20
4.5.5 Tie cabling 20
4.6 Accommodation of functional elements 20
4.6.1 General 20
4.6.2 Telecommunications Outlets 21
4.6.3 Distributors 21
4.6.4 Cables 21
4.6.5 Consolidation Points 21
4.7 Interfaces 21
4.7.1 Equipment interfaces and test interfaces 21
4.7.2 Channels and links 22
4.8 Dimensioning and configuring 22
4.8.1 Distributors 22
4.8.2 Cables 23
4.8.3 Connecting hardware 23
4.8.4 Cords 23
4.8.5 Telecommunications Outlets and Consolidation Points 23
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EN 50173-3:2018 (E)
4.8.6 External network interface 24
5 Channel performance in industrial spaces 24
5.1 General 24
5.2 Environmental performance 26
5.3 Transmission performance 26
5.3.1 General 26
5.3.2 Balanced cabling 26
5.3.3 Optical fibre cabling 27
6 Reference implementations in industrial spaces 27
6.1 General 27
6.2 Balanced cabling 27
6.2.1 Assumptions 27
6.2.2 Intermediate cabling 28
6.2.3 Floor cabling 31
6.2.4 Backbone cabling 31
6.3 Optical fibre cabling 31
6.3.1 Intermediate and floor cabling 31
6.3.2 Backbone cabling 32
7 Requirements for cables in industrial spaces 33
7.1 General 33
7.2 Balanced cables of Category 5, 6, 6 7, 7 , 8.1 and 8.2 33
A, A
7.3 Optical fibre cables of Category OM3, OM4, OM5, OS1a and OS2 33
8 Requirements for connecting hardware in industrial spaces 33
8.1 General requirements 33
8.2 Balanced connecting hardware 34
8.2.1 General requirements 34
8.2.2 Electrical, mechanical and environmental performance 34
8.3 Optical fibre connecting hardware 34
8.3.1 General requirements 34
8.3.2 Connecting hardware for optical fibres 34
9 Requirements for cords and jumpers in industrial spaces 35
9.1 Jumpers 35
9.2 Balanced cords of Category 5, 6, 6A, 7, 7A, 8.1 and 8.2 35
9.2.1 General 35
9.2.2 Additional requirements for certain cords 35
9.3 Optical fibre cords of Category OM3, OM4, OM5, OS1a and OS2 35
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
Annex A (normative) Permanent link performance limits 36
A.1 General 36
A.2 Balanced cabling and optical fibre cabling 37
A.2.1 General 37
A.2.2 Balanced cabling 37
A.2.3 Optical fibre cabling 37
Annex B (normative) Industrial cabling subsystem 38
B.1 General 38
B.2 Industrial cabling subsystem 39

Annex C (normative) Reference implementations that do not conform to Clause 4 40

C.1 General 40
C.2 Connection-less channels 40
C.2.1 General 40
C.2.2 Channels with no connections 40
C.2.3 Channels with interconnections 41
C.3 Channels using balanced cabling bulkhead connections 43
Annex D (informative) Alternative cabling implementations 47
D.1 General 47

D.2 Channels using balanced cabling bulkhead connections with additional connections 47

Bibliography 51
Figures

Figure 1 — Schematic relationship between the EN 50173 series and other relevant standards 8

Figure 2 — Relationships between the generic cabling standards produced by CLC TC215 and CLC SC65CX

10
Figure 3 — Structure of generic cabling 14
Figure 4 — Hierarchical topology of structured cabling 15
Figure 5 — Structures for centralized generic cabling 16
Figure 6 — Interconnections at the TO 17
Figure 7 — Examples of cabling implementation to improve reliability 19
Figure 8 — Accommodation of functional elements 21
Figure 9 — Test and equipment interfaces 22
Figure 10 — Transmission performance of an intermediate cabling channel 25
Figure 11 — Example of a system showing the location of cabling interfaces 26
Figure 12 — Intermediate cabling models 30
Figure 13 — Combined optical fibre intermediate/floor channels 32
Figure A.1 — Permanent link options 36
Figure B.1 — Industrial cabling system supporting several AIs 38

Figure B.2 — Combined structure of generic and industrial cabling system using an IID 39

Figure C.1 — Channel configurations with no connections 41
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
Figure C.2 — Channel configurations with balanced cabling interconnections 42

Figure C.3 — Channel configurations with balanced cabling bulkhead connections 44

Figure D.1 — Alternative channel configurations 48
Tables

Table 1 — Contextual relationship between EN 50173 series and other standards relevant for information

technology cabling systems 8
Table 2 — Maximum channel lengths for reference implementations 23
Table 3 — Intermediate channel length equations 30
Table C.1 — Channel equations for balanced cabling 43
Table C.2 — Channel equations for bulkhead connections 45
Table D.1 — Alternative channel equations 50
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
European foreword

This document (EN 50173-3:2018) has been prepared by the Technical Committee CENELEC TC 215

"Electrotechnical aspects of telecommunication equipment".
The following dates are fixed:
• latest date by which this document has (dop) 2019-03-19
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-03-19
standards conflicting with this document
have to be withdrawn
This document supersedes EN 50173-3:2007 + A1:2010 + AC:2011.

The European Standards EN 50173:1995 and EN 50173-1:2002 have been developed to enable the

application-independent cabling to support ICT applications in office premises. Their basic principles,

however, are applicable to other types of applications and in other types of premises.

TC 215 has decided to establish relevant European Standards which address the specific requirements of

these premises. In order to point out the commonalities of these cabling design standards, these EN are

published as individual parts of the series EN 50173, thus also acknowledging that standards users recognize

the designation “EN 50173” as a synonym for generic cabling design.

At the time of publication of this European Standard, series EN 50173 comprises the following standards:

EN 50173-1 Information technology – Generic cabling systems – Part 1: General requirements

EN 50173-2 Information technology – Generic cabling systems – Part 2: Office premises

EN 50173-3 Information technology – Generic cabling systems – Part 3: Industrial spaces

EN 50173-4 Information technology – Generic cabling systems – Part 4: Homes

EN 50173-5 Information technology – Generic cabling systems – Part 5: Data centres

EN 50173-6 Information technology – Generic cabling systems – Part 6: Distributed building services

This European Standard, EN 50173-3, contains specific requirements for generic cabling systems intended to

be operated in industrial premises, referencing the general requirements of EN 50173-1:2018

This edition of EN 50173-3:

a) introduces new balanced cabling component Categories 8.1 and 8.2 to support new channel Classes I

and II;
b) introduces a new cabled optical fibre Category OM5 and Category OS1a;
c) introduces a new Annex on the industrial cabling subsystem;
d) amends various other subclauses, tables and figures;

e) aligns the document structure across the EN 50173 series and updates the document both technically

and editorially.

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.

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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
Introduction

The importance of cabling infrastructure is similar to that of other fundamental utilities such as water and

energy supply and interruptions to the services provided over that infrastructure can have a serious impact. A

lack of design foresight, the use of inappropriate components, incorrect installation, poor administration or

inadequate support can threaten quality of service and have commercial consequences for all types of users.

This standard specifies generic cabling to serve the automation islands in industrial premises, or industrial

spaces within other types of building.
Additionally those premises can include:
— office spaces for which generic cabling is specified in EN 50173-2;
— data centre spaces for which generic cabling is specified in EN 50173-5.

Generic cabling for distributed building services in industrial spaces is specified in EN 50173-6 which

addresses all of the above premises and spaces within them.

Figure 1 and Table 1 show the schematic and contextual relationships between the standards produced by

TC 215 for information technology cabling, namely:
1) this and other parts of the EN 50173 series;
2) installation (EN 50174 series);
3) bonding (EN 50310).
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)

Figure 1 — Schematic relationship between the EN 50173 series and other relevant standards

Table 1 — Contextual relationship between EN 50173 series and other standards relevant for

information technology cabling systems
Building design Generic cabling Specification Installation Operation phase
phase design phase phase phase
EN 50173-2 EN 50174-1
EN 50173-3
Planning phase
EN 50173-4
EN 50174-2
EN 50173-5
EN 50310 EN 50174-3 EN 50174-1
EN 50173-6 EN 50174-2
EN 50310
EN 50174-3
(these ENs
EN 50310
reference general
requirements of
EN 50173-1)

In addition, a number of Technical Reports have been developed to support or extend the application of these

standards, including:
— CLC/TR 50173-99-1, Cabling guidelines in support of 10 GBASE-T;
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)

— CLC/TR 50173-99-2, Information technology — Implementation of BCT applications using cabling in

accordance with EN 50173-4;

— CLC/TR 50173-99-3, Information technology — Generic cabling systems — Part 99-3: Home cabling

infrastructures up to 50 m in length to support simultaneous and non simultaneous provision of

applications.

In addition, a number of cabling design standards have been developed using components of EN 50173-1

(e.g. EN 50098 series and EN 50700).
The generic cabling specified by this standard provides users with:

— an application independent system capable of supporting a wide range of applications in a range of

installation and operating environments;
— a flexible scheme such that modifications are both easy and economical;
— a multi-vendor supply chain within an open market for cabling components.
In addition this standard provides:

a) relevant industry professionals with guidance allowing the accommodation of cabling before specific

requirements are known; i.e. in the initial planning either for construction or refurbishment and for further

deployment as the requirements of areas are defined;

b) industry and standardization bodies with a cabling system which supports current products and provides

a basis for future product development and applications standardization.

Applications addressed in this standard include those developed by the Technical Committees of IEC

(including the subcommittees of ISO/IEC JTC 1) and study groups of ITU-T. In addition the Fieldbus

applications of EN 61784 (series) are included in order to support critical automation, process control and

monitoring applications in a range of industrial environments.

Physical layer requirements for the applications listed in EN 50173-1:2018, Annex F, have been analysed to

determine their compatibility with the cabling performance specified in this standard and, together with

statistics concerning premises geography from different countries and the models described in Clause 4,

have been used to develop the requirements for cabling components and to stipulate their arrangement into

cabling systems.
As a result, this standard:

a) specifies a structure for generic cabling supporting a wide variety of applications including, but not

restricted to, those in EN 50173-1:2018, Annex F;

b) adopts balanced cabling channel and link Classes D, E, EA, F and FA, specified in EN 50173-1;

c) adopts optical fibre cabling channel and link requirements specified in EN 50173-1;

d) adopts component requirements, specified in EN 50173-1, and specifies cabling implementations that

ensures performance of links and of channels meeting the requirements of a specified group (e.g. Class)

of applications.

With appropriate choice of components, generic cabling systems meeting the requirements of this standard

are expected to have a life expectancy consistent with other infrastructures within industrial premises.

Figure 2 shows the relationships between the generic cabling standards produced by CLC TC215 and the

application specific standards that apply to the industrial premises produced by CLC SC65CX.

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SIST EN 50173-3:2018
EN 50173-3:2018 (E)

Figure 2 — Relationships between the generic cabling standards produced by CLC TC215 and CLC

SC65CX
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
1 Scope and conformance
1.1 Scope

This standard specifies generic cabling to serve the automation islands in industrial premises, or industrial

spaces within other types of building.
It covers balanced cabling and optical fibre cabling.
This standard specifies directly or via reference to EN 50173-1 the:

— structure and minimum configuration for generic cabling within industrial spaces;

— interfaces at the telecommunications outlet (TO);
— performance requirements for cabling links and channels;
— implementation requirements and options;
— performance requirements for cabling components;
— conformance requirements and verification procedures.

This standard has taken into account requirements specified in application standards listed in EN 50173-1.

Safety and electromagnetic compatibility (EMC) requirements are outside the scope of this standard and are

covered by other standards and regulations. However, information given in this standard can be of assistance

in meeting these standards and regulations.
1.2 Conformance
For a cabling installation to conform to this standard the following applies.

a) The configuration and structure shall conform to the requirements of Clause 4.

b) Channels shall meet the requirements of Clause 5.
This shall be achieved by one of the following:

1) a channel design and implementation ensuring that the prescribed channel performance of Clause 5

is met;

2) attachment of appropriate components to a permanent link or CP link design meeting the prescribed

performance class of Annex A. Channel performance shall be ensured where a channel is created

by adding more than one cord to either end of a link meeting the requirements of Annex A;

3) for E1 environments, using the reference implementations of Clause 6 and compatible cabling

components conforming to the requirements of Clauses 7, 8 and 9 based upon a statistical

approach of performance modelling.

c) The interfaces to the cabling at the TO shall conform to the requirements of Clause 8 with respect to

mating interfaces and performance.

d) Connecting hardware at other places in the cabling structure shall meet the performance requirements

specified in Clause 8 independent of the interface used.
e) The requirements of EN 50174 series standards and EN 50310 shall be met.
f) Local regulations, including those concerning safety and EMC, shall be met.
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)

This standard does not specify which tests and sampling levels should be adopted. Test methods to assess

conformance with the channel and link requirements of Clause 5 and Annex A respectively are specified in

EN 50173-1. The test parameters to be measured, the sampling levels and the treatment of measured results

to be applied for a particular installation shall be defined in the installation specification and quality plans for

that installation prepared in accordance with EN 50174-1.

In the absence of the channel, the conformance of the link shall be used to verify conformance with the

standard.
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.

EN 50173-1:2018, Information technology — Generic cabling systems — Part 1: General requirements

EN 50174-1, Information technology — Cabling installation — Part 1: Installation specification and quality

assurance

EN 50174-2, Information technology — Cabling installation — Part 2: Installation planning and practices

inside buildings

EN 50174-3, Information technology — Cabling installation — Part 3: Installation planning and practices

outside buildings

EN 61076-3-106:2006, Connectors for electronic equipment — Product requirements — Part 3-106:

Rectangular connectors — Detail specification for protective housings for use with 8-way shielded and

unshielded connectors for industrial environments incorporating the IEC 60603-7 series interface

(IEC 61076-3-106:2006)

EN 61754-20:2012, Fibre optic interconnecting devices and passive components — Fibre optic connector

interfaces — Part 20: Type LC connector family (IEC 61754 20:2012)
3 Terms, definitions and abbreviations
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 50173-1 and EN 50174-1 and the

following apply.
3.1.1
apparatus

one or more pieces of equipment having specific and defined overall functions within industrial spaces served

by one or more network interfaces
3.1.2
apparatus attachment cord

cord used to connect a telecommunications outlet (TO) to terminal equipment (TE) or a network interface (NI)

3.1.3
automation island

areas where combination of all systems that control, monitor and protect the process of a plant is installed

3.1.4
bulkhead

wall or barrier which maintains the ingress and climatic environmental classifications applicable on either side

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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
3.1.5
floor cable
cable connecting the floor distributor to the intermediate distributor
3.1.6
floor distributor

the distributor used to make connections between the floor cable, building backbone cable and active

equipment
3.1.7
intermediate cable
cable connecting the intermediate distributor to the telecommunications outlet
3.1.8
intermediate distributor

distributor used to make connections between the intermediate cable, other cabling subsystems and active

equipment
3.1.9
network interface

interface between the apparatus attachment cabling and the apparatus or the automation island network

3.1.10
telecommunications outlet
fixed connector providing connection to terminal equipment
3.2 Abbreviations

For the purposes of this document, the abbreviations given in EN 50173-1 and the following apply.

AI Automation Island
AO Automation Outlet
CP Consolidation Point
FD Floor Distributor
ID Intermediate Distributor
IID Industrial Intermediate Distributor
NI Network Interface
PCMA Process Control, Monitoring and Automation
TO Telecommunications Outlet
4 Structure of the generic cabling system in industrial spaces
4.1 General

This clause identifies the functional elements of generic cabling for industrial premises, describes how they

are connected together to form subsystems and identifies the interfaces at which application-specific

components are connected to the generic cabling infrastructure. Applications listed in EN 50173-1:2018,

Annex F, are supported by connecting active equipment at the TOs and the distributors.

In general, all functional elements, subsystems and interfaces from the campus distributor to the floor

distributor as described in EN 50173-1 are applicable.
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
4.2 Functional elements

In addition to the distributors specified in EN 50173-1 this Standard specifies the following functional

elements and interfaces of generic cabling for industrial premises:
a) floor distributor (FD);
b) floor cable;
c) intermediate distributor (ID);
d) intermediate cable;
e) consolidation point (CP);
f) consolidation point cable (CP cable);
g) telecommunications outlet (TO).

Groups of these functional elements are connected together with those of EN 50173-1 to form cabling

subsystems.
4.3 Structure and hierarchy

Generic cabling schemes contain up to four cabling subsystems: campus backbone, building backbone, floor

and intermediate. The cabling subsystems are connected together to create a generic cabling structure as

shown in Figure 3. The composition of the subsystems is described in 4.4.2.2, 4.4.2.1, 4.4.1.2, and 4.4.1.1.

The functional elements of the cabling subsystems are interconnected to form a hierarchical structure as

shown in Figure 4.

Connections between cabling subsystems are either active, requiring application-specific equipment, or

passive. Connection to application-specific equipment adopts either an interconnect or a cross-connect

approach (see EN 50173-1). Passive connections between cabling subsystems shall be achieved using

cross-connections generally by way of either patch cords or jumpers, or an interconnect approach.

Figure 3 — Structure of generic cabling
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
Figure 4 — Hierarchical topology of structured cabling

Centralized cabling structures as shown in Figure 5 combine backbone, floor and intermediate channels. The

channels are provided by passive connections in the distributors. The connections are achieved by using

either cross-connections or interconnections. In addition, for centralized optical fibre cabling, it is possible to

create connections at the distributors using splices although this reduces the ability of the cabling to support

re-configuration.
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
Figure 5 — Structures for centralized generic cabling

As shown in Figure 6, an ID is able to serve TOs on telecommunications terminal equipment (TE), apparatus

or on automation islands. Apparatus can be served with multiple TOs. The type and nature of the apparatus

attachment cords and cabling are beyond the scope of this European Standard.
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
Figure 6 — Interconnections at the TO

The provision of certain critical process control, monitoring and automation (PCMA) applications to an AI it is

necessary to replace the intermediate cabling subsystem with application-specific cabling which is not

specified by this European Standard. However, Annex B describes an industrial cabling subsystem to support

specific implementations of this cabling in accordance with EN 61918 to support specific applications of the

EN 61784 series.

Examples of more complex equipment connection systems that are not in accordance with this clause are

described in Annex C and Annex D as follows:

a) Annex C describes reference implementations, using the components of Clauses 7, 8 and 9, which

deliver transmission performance in accordance with the Classes of Clause 5;

b) Annex D describes reference implementations, using the components Clauses 7, 8 and 9 that are

capable of delivering transmission performance in accordance with the Classes of Clause 5 but are not

able to be supported in a normative manner by this standard.
4.4 Cabling subsystems
4.4.1 Industrial space cabling subsystems
4.4.1.1 Intermediate cabling subsystem

The intermediate cabling subsystem extends from an ID to the TO(s) connected to it. The subsystem

includes:
a) the intermediate cables;

b) the mechanical termination of the intermediate cables at the TO and the ID together with associated

patch cords and/or jumpers at the ID;
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SIST EN 50173-3:2018
EN 50173-3:2018 (E)
c) CP(s) (optional);
d) CP cables (optional);
e) the TO(s).

Although apparatus attachment and equipment cords are used to connect terminal equipment, network

interfaces and transmission equipment to the cabling subsystem, they are not considered part of the cabling

subsystem because they can be application-specific.

Intermediate cables shall be continuous from the intermediate distributor to the TO(s) unless a CP is installed

(see 4.8.5.2).
4.4.1.2 Floor cabling subsystem

The floor cabling subsystem extends from an FD to the ID connected to it. The subsystem includes:

a) the floor cables;

b) the mechanical termination of the floor cables including the connecting hardware (e.g. of interconnect or

cross-connect) at both the FD and IDs together with associated patch cords and/or jumpers;

c) any passive connections to the building backbone cabling.

Although equipment cords are included in a channel, they are not considered part of the cabling subsystem

because they can be application-specific.
4.4.2 Associated cabling subsystems
4.4.2.1 Building backbone cabling subsystem
See EN 50173-1.
4.4.2.2 Campus backbone cabling subsystem
See EN 50173-1.
4.5 Design objectives
4.5.1 General

The design objectives should address the performance and capacity aspects described in 4.5.2, 4.5.3, 4.5.4

and 4.5.5.

In addition, the design should support objectives of reliability (by means of design choices addressing

resilience, redundancy and disaster recovery) and any requirements for localized security. Measures that can

be considered (see Figure 7) include:
a) multiple and physically separated building entrances;
b) facilities served by mu
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