SIST EN 50155:2021

SLOVENSKI STANDARD
SIST EN 50155:2021
01-oktober-2021
Nadomešča:
SIST EN 50155:2018
Železniške naprave - Vozna sredstva - Elektronska oprema
Railway applications - Rolling stock - Electronic equipment
Bahnanwendungen - Elektronische Einrichtungen auf Schienenfahrzeugen
Applications ferroviaires - Équipements électroniques utilisés sur le matériel roulant
Ta slovenski standard je istoveten z: EN 50155:2021
ICS:
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
SIST EN 50155:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50155:2021

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SIST EN 50155:2021


EUROPEAN STANDARD EN 50155

NORME EUROPÉENNE

EUROPÄISCHE NORM
July 2021
ICS 45.060.01 Supersedes EN 50155:2017 and all of its amendments
and corrigenda (if any)
English Version
Railway applications - Rolling stock - Electronic equipment
Applications ferroviaires - Équipements électroniques Bahnanwendungen - Fahrzeuge - Elektronische
utilisés sur le matériel roulant Betriebsmittel
This European Standard was approved by CENELEC on 2021-06-28. 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, 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.
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.
 Ref. No. EN 50155:2021 E

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EN 50155:2021 (E)
Contents
European foreword . 5
Introduction . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviations .11
3.1 Terms and definitions .11
3.2 Abbreviations .17
4 General requirements .18
4.1 Requirement for equipment characteristics .18
4.2 Classes of environmental, constructional and service conditions .18
4.3 Performance criteria .18
4.4 Environmental service conditions .19
4.5 Special service conditions .23
4.6 Installation requirements .23
5 Electrical service conditions .24
5.1 General .24
5.2 Battery voltage supply system .26
5.3 Supply by another source than the vehicle battery .30
6 Reliability, maintainability and expected useful life .30
6.1 Equipment reliability .30
6.2 Useful life .31
6.3 Maintainability .31
6.4 Automatic test equipment .32
6.5 Purpose-built test equipment and special tools .32
7 Design .33
7.1 General .33
7.2 Detailed practices - Hardware .33
7.3 Detailed practices - Software .37
7.4 Features of software-controlled equipment .37
8 Electronic equipment not designed for use on rolling stock .38
9 Components .38
9.1 Procurement .38
9.2 Application .38
10 Construction .39
10.1 Equipment construction .39
10.2 Component mounting .40
10.3 Electrical connections .41
10.4 Internal flexible wiring (electrical and optical) .42
10.5 Flexible printed wiring .42
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10.6 Printed circuit boards - flexible and rigid .42
10.7 Protective coatings for printed board assemblies .43
10.8 Identification .44
10.9 Mounting .44
10.10 Cooling and ventilation .44
10.11 Materials and finishes .45
10.12 Reworking, modification and repair of electronic assemblies .45
11 Safety .45
11.1 General .45
11.2 Personnel safety .45
11.3 Functional safety .45
11.4 Fire behaviour requirements .45
12 Documentation .46
12.1 General .46
12.2 Supply and storage of documentation .46
12.3 Datasheet .46
12.4 User and maintenance manual .46
12.5 Equipment installation documentation .46
12.6 Commissioning documentation .47
12.7 Design documentation .47
13 Testing .51
13.1 General .51
13.2 Categories of tests .52
13.3 List of tests and test conditions .53
13.4 Test specification .54
Annex A (informative) List of default requirements of EN 50155 and related subclauses .69
Annex B (informative) System testing approach .70
B.1 General .70
B.2 Situation of applicability .70
B.3 General methodology .70
B.3.1 General .70
B.3.2 Item specific procedures .71
B.3.3 Equipment specific steps .71
B.4 Equipment integration design review .72
B.5 Equipment integration type test .72
B.6 Equipment installation design review.72
B.7 Equipment installation type test .72
B.8 Equipment installation routine test .72
B.9 Equipment periodic re-verification .72
B.10 Replacement of items and ancillary components .72
Annex C (informative) Severity level of service conditions in different vehicle locations .74
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C.1 General .74
C.2 Severity of service conditions in different rolling stock types .74
C.3 Intended use of rolling stock .74
C.4 Location of equipment on-board rolling stock .74
C.5 Severity of the service conditions in different rolling stock locations .76
Annex D (informative) Example for a summary of equipment type test compliance .78
Annex E (informative) User programmable integrated circuit life cycle example .81
Annex F (informative) Design suggestions for electronic hardware used on rolling stock .82
F.1 Purpose of this annex .82
F.2 Design topics .82
F.2.1 Pollutants .82
F.2.2 Methods against ageing regarding energetic transient pulses .82
F.2.3 Capacitors to earth .83
F.2.4 Inside cabling for equipment .83
F.2.5 Earth configuration .84
F.2.6 Prototype testing .84
F.2.7 Interfacing .84
F.2.8 Solder joint on PBA .84
F.2.9 Derating .84
Annex G (informative) Electronic equipment not designed for use on rolling stock .92
Annex H (informative) Paragraphs with Agreements between the involved Parties .94
Annex I (informative) Electronic equipment supplied from AC supply system .99
I.1 General .99
I.2 Electric requirements .99
Annex J (informative) Typical content of datasheets .100
Annex K (informative) Insulation test and testing matrix example .103
Annex L (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2016/797/EU aimed to be covered .105
Bibliography .107

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SIST EN 50155:2021
EN 50155:2021 (E)
European foreword
This document (EN 50155:2021) has been prepared by CLC/SC 9XB, “Electrical, electronic and
electromechanical material on-board rolling stock, including associated software”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2022-06-28
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2024-06-28
conflicting with this document have to be
withdrawn
This document supersedes EN 50155:2017 and all of its amendments and corrigenda (if any).
EN 50155:2021 includes the following significant technical changes with respect to EN 50155:2017:
a) Revision of Clause 1 Scope;
1) Precision about definition of electronic equipment and his components;
2) Precision about covered scopes;
3) Precision about applicability of this standard to electronic equipment or systems performing
safety-related functions.
b) Updating of Clause 2 Normative references;
c) Revision of Clause 3 Terms, definitions and abbreviations”, new definitions and reorganisation of
subclauses;
1) Definition added for “performance”;
2) Definition added for “adjacent circuit”;
3) Definition added for “specification”;
4) Definition added for “procedure”.
d) Improvement of Clause 4 General requirements, in terms of better wording, requirement expansion
and reorganisation of subclauses;
1) Precision about concept of normal performance level and concept of deviation of the normal
performance level;
2) Wording improvements of 4.3.2 to 4.3.4 “Performance criterion A, B and C”;
3) Wording improvement of “4.6.4 Thermal compatibility”;
4) Wording improvement of “4.6.6 Cabling inside vehicle” and “4.6.7 Wiring inside equipment”.
e) Improvement of Clause 5 Electrical service conditions, with reorganisation of subclauses;
1) Subclause “DC supply” is renamed “5.1.1 DC Supply system”;
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2) Subclause “5.1.2 AC supply system” is added;
3) Precisions added and editorial improvements of 5.2.1 to 5.2.8;
4) Concept of “rated voltage” is clarified in 5.2.2;
5) Wording improvement of subclause “5.2.6 Grouping of supply voltages”;
6) Subclause added: “5.3 Supply by another source than the vehicle battery”.
f) Improvement and simplification of Clause 6 Reliability, maintainability and expected useful life, with
reorganization of subclauses and introduction of explicative figures;
g) Wording improvements and precision added to Clause 7 Design;
h) Clause 8 is renamed “Electronic equipment not designed for use on rolling stock application”;
i) Improvement of Clause 9 Components, revised requirement regarding the compliance with a quality
system;
j) Wording improvements and precisions added for Clause 10 Construction;
k) Revision of Clause 11 Safety, reorganisation of subclauses;
l) Revision of Clause 12 Documentation;
1) In addition to the datasheet and user manual, equipment installation and commissioning
information have to be provided to the user;
2) Typical content of the datasheet, is moved to Annex J;
3) The acronyms UPIC is used to designate User Programmable Integrated Circuit.
m) Improvements of texts and figures of Clause 13 Testing;
1) Generation, access and delivery of type test and routine test reports, are clarified.
2) Access or delivery of test reports, and tests subject to agreement must be agreed at tender
stage.
3) Equipment used for type tests shall be already submitted to routine test procedure and shall
be identified in the type test report by its part number and serial number.
4) Added : For “Prototype testing”, see Annex F – F.2.6
5) Table 11 — List of tests is rearranged;
6) Conditions during testing is moved in a new 13.3.2;
7) Improvements and clarification of 13.4.3 DC Power supply test;
8) Precisions added to 13.4.4 Low temperature test;
9) Precisions added to 13.4.5 Dry heat test - including use of rated voltage;
10) Precisions added to 13.4.7 Insulation test;
11) Precisions added to 13.4.8 Cyclic damp heat test;
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12) Precisions added to 13.4.10 Shock and vibration test;
13) Precisions added to 13.4.12 Rapid temperature variation test;
14) Precisions added to 13.4.13 Salt mist test.
n) Improvement of the following informative Annexes:
1) Annex A - List of default requirements of EN 50155 and related subclauses;
2) Annex B - System Testing approach;
3) Annex C - Severity level of service conditions in different vehicle locations;
4) Annex D - Example for a summary of equipment type test compliance;
5) Annex E - User programmable integrated circuit life cycle example;
6) Annex F - Design suggestions for electronic hardware used on rolling stock;
7) Annex G - Electronic equipment not designed for use on rolling stock;
8) Annex H – Paragraphs with agreement with the involved parties.
o) Introduction of the following informative Annexes;
1) New Annex I – Electronic equipment supplied from AC supply system;
2) New Annex J – Typical content of datasheets;
3) New Annex K – Insulation test and testing matrix example.
p) Bibliography (extended and corrected).
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.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association, and supports essential requirements
of EU Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an integral part
of this document.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
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EN 50155:2021 (E)
Introduction
This document specifies the requirements for the design, the manufacturing, the documentation and
testing of any electronic equipment installed on-board of rolling stock.
It also describes the electrical and environmental operating conditions.
The aim of this document is not to be a detailed guideline for the design of the electronic equipment.
The design is the supplier´s responsibility, however some recommendations are given in informative
annexes in order to draw the attention of the designer on known design aspects. The supplier should
take into account the requirements resulting from the specific location of the on-board installation
(see Annex C).
This document specifies the requirements for the design, the manufacturing, the documentation and
testing of any electronic equipment installed on-board rolling stock.
The roles of user and/or supplier are shown in Figure 1 below.

Figure 1 — Roles and relationship of user and/or supplier
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1 Scope
This document applies to all electronic equipment for control, regulation, protection, diagnostic, energy
supply, etc. installed on rail vehicles.
For the purpose of this document, electronic equipment is defined as equipment composed of electronic
components (e.g. resistors, capacitors, transistors, diodes, integrated circuits, hybrids, application
specific integrated circuits, wound components and relays), and recognized associated components
(e.g. connectors, mechanical parts). These components are mainly mounted on printed circuit boards.
Sensors (e.g. current, voltage, speed) and semiconductor drive units for power electronic devices are
covered by this standard. Complete semiconductor drive units and power converters are covered by
EN 61287-1.
This document covers the requirements for operating conditions, design, documentation, testing and
integration of electronic equipment, as well as hardware and software requirements considered
necessary for compliant and reliable equipment.
Specific requirements related to practices necessary to ensure defined safety integrity level or functional
safety are not covered by this document. Nevertheless, this document applies to the hardware of all
rolling stock electronic equipment or systems performing safety-related functions.
The software requirements for on-board railway equipment are specified by EN 50657.
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.
NOTE 1 The IPC normative references are acceptable only until an equivalent standard from an official
International or European Standardisation body will become available which cover the same requirements now
covered by the referenced IPC standard.
NOTE 2 The version of IPC normative references, herein after listed, is identified by the last letter of the
identification code, e.g. the letter J in IPC-A-600J identify the version J which was published in May 2016. However,
the publication date is reported, even though implicit in the last letter. Consequently, the date is not repeated in the
text of this document when the IPC normative references appear.
EN 45545-1:2013, Railway applications - Fire protection on railway vehicles - Part 1: General
EN 45545-2:2020, Railway applications - Fire protection on railway vehicles - Part 2: Requirements for
fire behavior of materials and components
EN 45545-5:2013+A1:2015, Railway applications - Fire protection on railway vehicles - Part 5: Fire
safety requirements for electrical equipment including that of trolley buses, track guided buses and
magnetic levitation vehicles
EN 50121-3-2, Railway applications - Electromagnetic compatibility - Part 3-2: Rolling stock -
Apparatus1), Railway applications — Electromagnetic compatibility — Part 3-2: Rolling stock -
Apparatus
EN 50124-1:2017, Railway applications - Insulation coordination - Part 1: Basic requirements -
Clearances and creepage distances for all electrical and electronic equipment
EN 50125-1:2014, Railway applications - Environmental conditions for equipment - Part 1: Rolling stock
and on-board equipment

1) Document impacted by EN 50121-3-2:2016/A1:2019.
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EN 50126-1:2017, Railway Applications - The Specification and Demonstration of Reliability,
Availability, Maintainability and Safety (RAMS) - Part 1: Generic RAMS Process
EN 50153, Railway applications - Rolling stock - Protective provisions relating to electrical hazards2)
EN 50163, Railway applications - Supply voltages of traction systems3)
EN 50343, Railway applications - Rolling stock - Rules for installation of cabling4)
EN 50533, Railway applications - Three-phase train line voltage characteristics5)
EN 50657:2017, Railways Applications - Rolling stock applications - Software on Board Rolling Stock
EN 60068-2-1:2007, Environmental testing - Part 2-1: Tests - Test A: Cold
EN 60068-2-2:2007, Environmental testing - Part 2-2: Tests - Test B: Dry heat
EN IEC 60068-2-11:2021, Environmental testing - Part 2: Tests - Test Ka: Salt mist
EN 60068-2-30:2005, Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12
h cycle)
EN 60297-3-100:2009, Mechanical structures for electronic equipment - Dimensions of mechanical
structures of the 482,6 mm (19 in) series - Part 3-100: Basic dimensions of front panels, subracks,
chassis, racks and cabinets
EN 60297-3-101:2004, Mechanical structures for electronic equipment - Dimensions of mechanical
structures of the 482,6 mm (19 in) series - Part 3-101: Subracks and associated plug-in units
EN 60529, Degrees of protection provided by e
...