EN 50121-4:2006

SLOVENSKI STANDARD
01-januar-2007
1DGRPHãþD
SIST EN 50121-4:2001
Železniške naprave - Elektromagnetna združljivost - 4. del: Sevanje in odpornost
signalnih in telekomunikacijskih naprav (vsebuje popravek AC:2008)
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 50121-4:2006
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
July 2006
EUROPÄISCHE NORM
ICS 29.020; 29.280; 45.020 Supersedes EN 50121-4:2000
Incorporates corrigendum May 2008

English version
Railway applications -
Electromagnetic compatibility
Part 4: Emission and immunity of the signalling and
telecommunications apparatus
Applications ferroviaires -  Bahnanwendungen -
Compatibilité électromagnétique Elektromagnetische Verträglichkeit
Partie 4: Emission et immunité Teil 4: Störaussendungen und
des appareils de signalisation Störfestigkeit von Signal- und
et de télécommunication Telekommunikationseinrichtungen

This European Standard was approved by CENELEC on 2006-07-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50121-4:2006 E
Foreword
This European Standard was prepared by Technical Committee TC 9X: Electrical and electronic
applications for railways. The text of the draft was submitted to the formal vote and was approved by
CENELEC as EN 50121-4 on 2006-07-01.
This European Standard supersedes EN 50121-4:2000.
This European Standard is to be read in conjunction with EN 50121-1.

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

The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-07-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-07-01
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive 2004/108/EC. See Annex ZZ.

The contents of the corrigendum of May 2008 have been included in this copy.

__________
- 3 - EN 50121-4:2006
Contents
Introduction . 4
1 Scope . 4
2 Normative references . 5
3 Definitions . 6
4 Description of location . 6
5 Emission limits for apparatus . 6
6 Immunity . 7
6.1 Performance criteria . 7
6.2 Test requirements . 7
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives . 12

Figure
Figure 1 – Main categories of ports . 6

Tables
Table 1 – Immunity – Enclosure port . 8
Table 2 – Immunity – I/O port . 9
Table 3 – Immunity – D.C. power ports . 10
Table 4 – Immunity – A.C. power ports . 11
Table 5 – Immunity – Earth port . 11

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 in the railway locations.

Test requirements are specified for each port considered.

Safety considerations are not covered by this standard.

In special 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.

1 Scope
This European Standard applies to signalling and telecommunication apparatus which is installed in
the railway environment. Signalling and telecommunication apparatus mounted in vehicles is covered
by EN 50121-3-2.
This standard specifies limits for emission and immunity and provides performance criteria for
signalling and telecommunications (S&T) apparatus which may interfere with other apparatus in the
railway environment, or increase the total emissions for the railway environment beyond the limits
defined in the appropriate standard 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 d.c. power port are within the
emissions limits specified for a.c. power ports. The immunity levels of EN 61000-6-2 will also be
adequate except for the special case of apparatus as defined in note 1 of Table 1. This standard
provides the immunity requirements for such apparatus.

The immunity levels given for the apparatus will in most cases allow the apparatus to perform as
intended in the railway environment (see note). 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 emission and immunity limits in this standard at the
communication frequency do not apply.

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 requirements and test methods also apply to telecommunications and signalling data and power
lines connected to the equipment under test (EUT).

The frequency range considered is from d.c. 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 or EN 61000-3-3, the requirements of those standards
apply.
- 5 - EN 50121-4:2006
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.

NOTE  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 referenced documents are indispensable for the application 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 Railway applications – Electromagnetic compatibility
Part 1: General
EN 50121-3-2 Railway applications – Electromagnetic compatibility
Part 3-2: Rolling stock – Apparatus
EN 61000-3-2 Electromagnetic compatibility (EMC) –
Part 3-2: Limits – Limits for harmonic current emissions (equipment input
current up to and including 16 A per phase) (IEC 61000-3-2)
EN 61000-3-3 Electromagnetic compatibility (EMC) –
Part 3-3: Limits – Limitation of voltage changes, voltage fluctu
...