EN 50121-4:2015

SLOVENSKI STANDARD
01-julij-2015
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: EN 50121-4:2015
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
45.020 Železniška tehnika na Railway engineering in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50121-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2015
ICS 29.280; 33.100.01; 45.020 Supersedes EN 50121-4:2006
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 European Standard was approved by CENELEC on 2015-01-05. 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, 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: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50121-4:2015 E
Contents
Foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 6
3 Terms, definitions and abbreviations . 6
3.1 Terms and definitions . 6
3.2 Abbreviations . 7
4 Description of location . 7
5 Emission limits for apparatus . 7
6 Immunity . 7
6.1 Performance criteria . 7
6.2 Test requirements . 8
Annex ZZ (informative) Coverage of Essential Requirements of EU Directives . 15
Bibliography . 16

- 3 - EN 50121-4:2015
Foreword
This document (EN 50121-4:2015) has been prepared by CLC/TC 9X: “Electrical and electronic
applications for railways”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2016-01-05
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2018-01-05
conflicting with this document have to
be withdrawn
This document supersedes EN 50121-4:2006.
EN 50121-4:2006:
- clarification of scope (Clause 1);
- set dated normative references (Clause 2);
- new definition (Clause 3);
- emission requirement extended in the frequency range 1 GHz to 6 GHz following EN 61000-6-4;
- immunity requirement extended in the frequency range 5,1 GHz to 6 GHz.
This European Standard is to be read in conjunction with EN 50121-1.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
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

Introduction
This European Standard 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 standard.
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.

- 5 - EN 50121-4:2015
1 Scope
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 50121-3-2:2015, signalling and telecommunication apparatus installed inside the substation and
connected to substation equipment is covered by EN 50121-5:2015.
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.
Apparatus which complies with the emission levels of EN 61000-6-4 will meet the emission
requirements of this standard provided that emissions from any DC power port are within the
emissions limits specified for AC power ports.
The immunity levels given 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.
The immunity levels given for the apparatus will in most cases allow the apparatus to perform as
intended inside the railway environment. The immunity level establishes a common reference for
evaluating the performance of the apparatus when subject to interference resulting from direct
exposure of the apparatus and associated cables to a radio frequency field, or by coupling of the
interference from a remote source.
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.
Test requirements are specified for each port considered.
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.
Testing methods are given in the basic standards listed in Clause 2, Normative references.

These specific provisions are to be used in conjunction with the general provisions in
EN 50121-1:2015.
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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 50121-1:2015, Railway applications - Electromagnetic compatibility - Part 1: General
EN 61000-4-2:2009, Electromagnetic com
...