Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus

This European Standard applies to signalling and telecommunication apparatus that is installed inside
the railway environment. Signalling and telecommunication apparatus mounted in vehicles is covered
by EN 50121-3-2:2016, signalling and telecommunication apparatus installed inside the substation and
connected to substation equipment is covered by EN 50121-5:2016.
This European Standard specifies limits for emission and immunity and provides performance criteria
for signalling and telecommunications (S&T) apparatus (including power supply systems belonging to
S&T) which may interfere with other apparatus inside the railway environment, or increase the total
emissions for the railway environment and so risk causing Electro-Magnetic Interference (EMI) to
apparatus outside the railway system.
The requirements specified in this standard apply for:
— vital equipment such as interlocking or command and control;
— apparatus inside the 3 m zone;
— ports of apparatus inside the 10 m zone with connection inside the 3 m zone;
— ports of apparatus inside the 10 m zone with cable length > 30 m.
Other apparatus not covered by at least one of these given cases should be in compliance with
EN 61000-6-2.
If a port is intended to transmit or receive for the purpose of radio communication (intentional radiators,
e.g. transponder systems), then the radiated emission requirement in this standard are not intended to
be applicable to the intentional transmission from a radio-transmitter as defined by the ITU.
Immunity limits do not apply in the exclusion bands as defined in the corresponding EMC related
standard for radio equipment.
The standard does not specify basic personal safety requirements for apparatus such as protection
against electric shock, unsafe operation, insulation co-ordination and related dielectric tests. The
requirements were developed for and are applicable to this set of apparatus when operating under
normal conditions. Fault conditions of the apparatus have not been taken into account.
The frequency range considered is from DC to 400 GHz. No measurements need to be performed at
frequencies where no requirement is specified.
For products in the scope of EN 61000-3-2, EN 61000-3-3, EN 61000-3-11 or EN 61000-3-12 the
requirements of those standards also apply.
These specific provisions are to be used in conjunction with the general provisions in
EN 50121-1:2016.
The immunity and emission levels do not of themselves guarantee that the integration of apparatus will
necessarily be satisfactory. The standard cannot cover all the possible configurations of the apparatus,
but the test levels are sufficient to achieve satisfactory EMC in the majority of cases.

Bahnanwendungen - Elektromagnetische Verträglichkeit - Teil 4: Störaussendungen und Störfestigkeit von Signal- und Telekommunikationseinrichtungen

Applications ferroviaires - Compatibilité électromagnétique - Partie 4: Emission et immunité des appareils de signalisation et de télécommunication

Železniške naprave - Elektromagnetna združljivost - 4. del: Sevanje in odpornost signalnih in telekomunikacijskih naprav

General Information

Status
Not Published
Public Enquiry End Date
30-Aug-2021
Current Stage
4020 - Public enquire (PE) (Adopted Project)
Start Date
20-May-2021
Due Date
07-Oct-2021

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SLOVENSKI STANDARD
oSIST prEN 50121-4:2021
01-julij-2021
Železniške naprave - Elektromagnetna združljivost - 4. del: Sevanje in odpornost
signalnih in telekomunikacijskih naprav

Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of

the signalling and telecommunications apparatus

Bahnanwendungen - Elektromagnetische Verträglichkeit - Teil 4: Störaussendungen und

Störfestigkeit von Signal- und Telekommunikationseinrichtungen

Applications ferroviaires - Compatibilité électromagnétique - Partie 4: Emission et

immunité des appareils de signalisation et de télécommunication
Ta slovenski standard je istoveten z: prEN 50121-4:2021
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
45.020 Železniška tehnika na Railway engineering in
splošno general
oSIST prEN 50121-4:2021 en

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

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oSIST prEN 50121-4:2021
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oSIST prEN 50121-4:2021
EUROPEAN STANDARD DRAFT
prEN 50121-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2021
ICS Will supersede EN 50121-4:2016 and all of its
amendments and corrigenda (if any)
English Version
Railway applications - Electromagnetic compatibility - Part 4:
Emission and immunity of the signalling and telecommunications
apparatus

Applications ferroviaires - Compatibilité électromagnétique - Bahnanwendungen - Elektromagnetische Verträglichkeit -

Partie 4: Emission et immunité des appareils de Teil 4: Störaussendungen und Störfestigkeit von Signal-

signalisation et de télécommunication und Telekommunikationseinrichtungen
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-10-15.
It has been drawn up by CLC/TC 9X.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CENELEC 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to

provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and

shall not be referred to as a European Standard.
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

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Project: 73231 Ref. No. prEN 50121-4:2021 E
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oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
Contents

European foreword ................................................................................................................................... 3

Introduction ............................................................................................................................................... 4

1 Scope ................................................................................................................................................ 5

2 Normative references ........................................................................................................................ 5

3 Terms, definitions and abbreviations ................................................................................................. 6

4 Description of location ....................................................................................................................... 7

5 Emission limits for apparatus ............................................................................................................ 7

6 Immunity ............................................................................................................................................ 9

Annex ZZ (informative) Relationship between this European standard and the essential

requirements of Directive 2014/30/EU [2014 OJ L96] aimed to be covered .......................................... 17

Bibliography ............................................................................................................................................ 18

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oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
European foreword

This document (prEN 50121-4:2021) has been prepared by CLC/TC 9X “Electrical and electronic

applications for railways”.
The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)

This document will supersede EN 50121-4:2016 and all of its amendments and corrigenda (if any).

prEN 50121-4:2021 includes the following significant technical changes with respect to

EN 50121-4:2016:
— clarification of scope (Clause 1);
— set dated normative references (Clause 2);
— Update of Clause 5;
— Introduction of performance criteria (Clause 6.1);
— Update of Clause 6.2, paragraph from Clause 1 was introduced;
— revision of Annex ZZ.
This European Standard is read in conjunction with EN 50121-1.

This document has been prepared under a mandate given to CENELEC by the European Commission

and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

document.

This standard forms Part 4 of the European Standard series EN 50121, published under the general

title “Railway applications - Electromagnetic compatibility”. The series consists of:

— Part 1: General;
— Part 2: Emission of the whole railway system to the outside world;
— Part 3-1: Rolling stock – Train and complete vehicle;
— Part 3-2: Rolling stock – Apparatus;

— Part 4: Emission and immunity of the signalling and telecommunications apparatus;

— Part 5: Emission and immunity of fixed power supply installations and apparatus.

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oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
Introduction
This document has been prepared in the form of a Product Standard.

It defines the immunity and emission test requirements for apparatus defined in the scope in relation to

the electromagnetic disturbances likely to be experienced in the railway. In particular, the test

requirements represent the essential electromagnetic immunity requirements and have been selected

to ensure an adequate level of immunity for apparatus installed on the railway locations.

Test requirements are specified for each port considered.
Safety considerations are not covered by this document.

In specific situations, where the level of disturbances may exceed the levels considered in this

standard, e.g. at a special location or where a hand-held transmitter is used in very close proximity to

an apparatus, special mitigation measures may have to be employed.
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oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
1 Scope

This document applies to railway signalling and telecommunication apparatus. Signalling and

telecommunication apparatus mounted in vehicles is covered by prEN 50121-3-2:2021, signalling and

telecommunication apparatus installed inside the substation and connected to substation equipment is

covered by prEN 50121-5:2021.

This document specifies limits for emission and immunity and provides performance criteria for

signalling and telecommunications (S&T) apparatus (including power supply systems belonging to

S&T) which may interfere with other apparatus inside the railway environment, or increase the total

emissions for the railway environment and so risk causing Electro-Magnetic Interference (EMI) to

apparatus outside the railway system.

The document does not specify basic personal safety requirements for apparatus such as protection

against electric shock, unsafe operation, insulation co-ordination and related dielectric tests. The

requirements were developed for and are applicable to this set of apparatus when operating under

normal conditions. Fault conditions of the apparatus have not been taken into account.

The frequency range considered is from DC to 400 GHz. No measurements need to be performed at

frequencies where no requirement is specified.

For products in the scope of EN 61000-3-2, EN 61000-3-3, EN 61000-3-11 or EN 61000-3-12 the

requirements of those document also apply.

These specific provisions are to be used in conjunction with the general provisions in

EN 50121-1:2016.

The immunity and emission levels do not of themselves guarantee that the integration of apparatus will

necessarily be satisfactory. The document cannot cover all the possible configurations of the

apparatus, but the test levels are sufficient to achieve satisfactory EMC in the majority of cases.

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 50121-1:2017, Railway applications - Electromagnetic compatibility - Part 1: General

EN 55016-2-1:2014, Specification for radio disturbance and immunity measuring apparatus and

methods - Part 2-1: Methods of measurement of disturbances and immunity - Conducted disturbance

measurements

EN 61000-4-2:2009, Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement

techniques - Electrostatic discharge immunity test

EN 61000-4-3:2006, Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement

techniques - Radiated, radio-frequency, electromagnetic field immunity test

EN 61000-4-4:2012, Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement

techniques - Electrical fast transient/burst immunity test

EN 61000-4-5:2014, Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement

techniques - Surge immunity test

EN 61000-4-6:2014, Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement

techniques - Immunity to conducted disturbances, induced by radio-frequency fields

EN 61000-4-8:2010, Electromagnetic compatibility (EMC) - Part 4-8: Testing and measurement

techniques - Power frequency magnetic field immunity test
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oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)

EN IEC 61000-6-4:2019, Electromagnetic compatibility (EMC) - Part 6-4: Generic standards - Emission

standard for industrial environments
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1.1
port
particular interface of the specified apparatus with the external environment
EXAMPLE AC power port, DC power port, I/O (input/output) port, earth port.
[SOURCE: IEC 60050-821: CDV2015, 821-11-36]
3.1.2
enclosure port

physical boundary of the apparatus through which electromagnetic fields may radiate or impinge

Enclosure port
AC power port I/O port
DC power port APPARATUS earth port
Figure 1 — Main categories of ports
3.1.3
3 m zone

area along the railway line within a distance of 3 m from the centreline of the nearest track at both

sides of the track
3.1.4
10 m zone

area along the railway line within a distance of 10 m from the centreline of the nearest track at both

sides of the track
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oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
3.2 Abbreviations
AC Alternating current
AM Amplitude modulation
DC Direct current
EMC Electromagnetic compatibility
EMI Electromagnetic interference
I/O Input / Output
ITU International Telegraph Union
S&T Signalling and telecommunication
4 Description of location
The railway environment is characterized as described in EN 50121-1:2017.
5 Emission limits for apparatus

The emission tests and limits for apparatus covered by this standard are given on a port by port basis.

Measurements shall be performed in well-defined and reproducible conditions for each type of

disturbance.

The radiated emission limits defined for enclosure port in EN IEC 61000-6-4:2019, Table 3 shall be

complied with. The description of the test, the test methods and the test set-up are given in Basic

Standards which are referred to in EN IEC 61000-6-4.

The description of the conducted emission tests, the test methods and the test set-up are given in

Basic Standards which are referred to in Table 1.

The conducted emission limits shall apply to both AC and DC power ports. Where the apparatus is

intended to be used in an environment other than the railway environment, then the emission limits

given in the appropriate standards shall apply.
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oSIST prEN 50121-4:2021
prEN 50121-4:2021 (E)
Table 1 — Emission — AC or DC power ports (input and output)
Test Basic Test Applicability
Port Remarks
specification Standard set-up note
1.1 AC or DC power 150 kHz to 79 dBμV qu
...

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