EN 50155:2017

SLOVENSKI STANDARD
01-januar-2018
1DGRPHãþD
SIST EN 50155:2007
SIST EN 50155:2007/AC:2012
Železniške naprave - Vozna sredstva - Elektronska oprema
Railway applications - Electronic equipment used on rolling stock
Bahnanwendungen - Elektronische Einrichtungen auf Schienenfahrzeugen
Applications ferroviaires - Équipements électroniques utilisés sur le matériel roulant
Ta slovenski standard je istoveten z: EN 50155:2017
ICS:
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50155
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2017
ICS 45.060.01 Supersedes EN 50155:2007
English Version
Railway applications - Rolling stock - Electronic equipment
Applications ferroviaires - Équipements électroniques Bahnanwendungen - Elektronische Einrichtungen auf
utilisés sur le matériel roulant Schienenfahrzeugen
This European Standard was approved by CENELEC on 2017-05-08. 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50155:2017 E
Page
Contents
European foreword . 9
Introduction . 11
1 Scope . 12
2 Normative references . 12
3 Terms, definitions and abbreviations . 14
3.1 Terms and definitions . 14
3.2 Abbreviations . 19
4 General requirements . 20
4.1 Performance requirements . 20
4.2 Performance criteria . 20
4.2.1 General . 20
4.2.2 Performance criterion A . 20
4.2.3 Performance criterion B . 20
4.2.4 Performance criterion C . 21
4.3 Environmental service conditions . 21
4.3.1 Altitude . 21
4.3.2 Operating temperature . 21
4.3.3 Switch-on extended operating temperature . 22
4.3.4 Rapid temperature variations . 23
4.3.5 Shock and vibration . 23
4.3.6 Electromagnetic compatibility . 23
4.3.7 Relative humidity. 23
4.4 Special service conditions . 24
4.4.1 General . 24
4.4.2 Atmospheric pollutants . 24
5 Electrical service conditions . 24
5.1 Power supply . 24
5.1.1 DC Supply . 24
5.1.2 Supply by a specified source other than the main power source . 28
5.1.3 Supply change-over . 28
5.1.4 Supply with overhead line or third rail . 28
5.2 Installation requirements . 29
5.2.1 Power supply . 29
5.2.2 Thermal compatibility . 29
5.2.3 Electromagnetic compatibility . 29
5.2.4 Cabling . 29
5.2.5 Installation instruction . 29
5.2.6 Insulation . 29
6 Reliability, maintainability and expected useful life . 29
6.1 Equipment reliability . 29
6.1.1 Predicted reliability . 29
6.1.2 Proof of reliability . 31
6.2 Useful life . 32
6.3 Maintainability . 33
6.3.1 General . 33
6.3.2 Preventive Maintenance . 33
6.3.3 Corrective Maintenance . 33
6.4 Built-in diagnostics . 34
6.5 Automatic test equipment. 34
6.6 Purpose built test equipment and special tools . 34
7 Design. 34
7.1 General. 34
7.1.1 Equipment . 34
7.1.2 Quality management . 34
7.1.3 System Life-cycle . 34
7.2 Detailed practices - Hardware . 35
7.2.1 Insulation coordination . 35
7.2.2 Interfacing . 35
7.2.3 Fault protection . 37
7.2.4 Referencing power supplies . 37
7.2.5 Interchangeability . 37
7.2.6 Reduction of supply voltage and ON/OFF phases . 37
7.2.7 Polarity reversal . 37
7.2.8 Inrush currents . 37
7.2.9 Energetic transient pulses . 37
7.2.10 Capacitance to ground/earth . 38
7.2.11 Spare capacity . 38
7.2.12 Programmable Component . 38
7.3 Detailed practices - Software . 38
7.3.1 General . 38
7.3.2 Life-cycle . 38
7.4 Features of software controlled equipment . 38
7.4.1 General . 38
7.4.2 Self-test . 38
7.4.3 Watchdog . 38
7.4.4 Failure indication . 38
7.4.5 Recovery . 38
8 Non-railway designed electronic equipment . 39
9 Components . 39
9.1 General. 39
9.2 Procurement . 39
9.3 Application . 39
10 Construction . 40
10.1 Equipment construction . 40
10.1.1 General . 40
10.1.2 Mechanical protection . 40
10.1.3 Polarization or coding . 40
10.1.4 Dimensional requirements . 40
10.1.5 Sockets and edge connectors . 40
10.1.6 Cabling inside cubicles . 40
10.2 Component mounting . 41
10.2.1 General . 41
10.2.2 Layout . 41
10.2.3 Fixing . 41
10.2.4 Component lead terminations . 41
10.2.5 Pre-set control . 41
10.2.6 Select on test components . 41
10.3 Electrical connections . 41
10.3.1 General . 41
10.3.2 Soldered connections . 41
10.3.3 Crimped connections . 42
10.3.4 Wire wrap connections . 42
10.3.5 Other connections . 42
10.4 Internal flexible wiring (electrical and optical) . 42
10.5 Flexible printed wiring . 42
10.6 Printed boards - flexible and rigid . 43
10.6.1 Printed board . 43
10.6.2 PCB acceptability . 43
10.6.3 Layout . 43
10.6.4 Materials . 43
10.7 Protective coatings for printed board assemblies . 43
10.8 Identification . 44
10.8.1 Bare PCB identification . 44
10.8.2 Identification of subracks and printed board assemblies . 44
10.8.3 Mounting position of subracks and printed board assemblies . 44
10.8.4 Fuse and battery identification . 44
10.9 Mounting . 44
10.10 Cooling and ventilation . 45
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 Requirements . 45
11.3 Fire behaviour requirements . 45
11.4 Functional safety . 46
11.5 Personnel safety . 46
12 Documentation . 46
12.1 General . 46
12.2 Supply and storage of documentation . 46
12.3 Datasheet . 46
12.4 User manual . 49
12.5 Equipment integration/installation documentation . 49
12.6 Commissioning documentation . 50
12.7 Design documentation . 50
12.7.1 General . 50
12.7.2 Block diagrams . 51
12.7.3 Wiring diagrams . 51
12.7.4 Interface specification . 51
12.7.5 Internal interface specification . 51
12.7.6 Equipment drawings . 51
12.7.7 Documentation – Hardware . 51
12.7.8 Non repairable items list . 52
12.7.9 Repair and Maintenance Documentation . 52
12.7.10 Documentation – Software . 53
12.7.11 Documentation – System . 54
13 Testing . 54
13.1 General . 54
13.2 Categories of tests. 54
13.2.1 General . 54
13.2.2 Type tests . 55
13.2.3 Routine tests . 55
13.2.4 Investigation tests . 55
13.3 Tests summary . 55
13.4 Test specification . 56
13.4.1 Visual inspection . 56
13.4.2 Performance test. 56
13.4.3 Power supply test. 57
13.4.4 Low temperature start-up test . 60
13.4.5 Dry heat test . 61
13.4.6 Low temperature storage test . 64
13.4.7 Cyclic damp heat test . 65
13.4.8 Electromagnetic compatibility test . 67
13.4.9 Insulation test . 67
13.4.10 Salt mist test . 68
13.4.11 Vibration and shock test . 69
13.4.12 Enclosure protection test (IP code) . 69
13.4.13 Stress screening test . 70
13.4.14 Rapid Temperature variation test . 70
Annex A (informative) List of default requirements of EN 50155 and related clauses . 71
Annex B (informative) Testing approach . 72
B.1 General. 72
B.2 Situation of applicability. 72
B.3 General methodology . 72
B.4 Equipment Specific Methodology . 74
B.5 Equipment integration design review . 74
B.6 Equipment integration type test . 74
B.7 Equipment installation design review . 74
B.8 Equipment installation type test . 75
B.9 Equipment installation routine test . 75
B.10 Equipment periodic re-verification . 75
B.11 Replacement of items and ancillary components . 75
Annex C (informative) Severity of the service conditions in different rolling stock locations . 76
C.1 General. 76
C.2 Severity of service conditions in different rolling stock types . 76
C.3 Intended use of rolling stock . 76
C.4 Location of equipment on board rolling stock . 76
C.5 Severity of the service conditions in different rolling stock locations . 78
Annex D (informative) Example of test report compliance summary . 80
Annex E (informative) Life cycle model examples — Programmable component life cycle
example . 82
Annex F (informative) Design guidelines for electronic hardware used on board of rolling stock
.............................................................................................................................................................. 83
F.1 Purpose of this annex . 83
F.2 Design Rules . 83
F.2.1 Pollutants . 83
F.2.2 Methods against ageing regarding energetic transient pulses . 83
F.2.3 Capacitor to ground/earth . 84
F.2.4 Inside cabling for equipment . 84
F.2.5 Earthing configuration . 84
F.2.6 Prototype testing . 85
F.2.7 Interfacing . 85
F.2.8 Solder joint on PBA . 85
F.2.9 Derating . 85
Annex G (informative) Non-railway designed electronic equipment . 96
Annex H (informative) Paragraphs with Agreements between the involved Parties . 98
Annex ZZ (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2008/57/EC . 102
Bibliography . 104

Tables
Table 1 — Operating temperature classes . 22
Table 2 — Switch-on extended Operating temperature classes . 22
Table 3 — Temperature variation classes . 23
Table 4 — Continuous Voltage range . 25
Table 5 — Fluctuation Voltage ranges . 25
Table 6 — Interruption voltage supply classes . 27
Table 7 — Maximum Peak to Peak Voltages with a DC Ripple Factor of 5 % . 28
Table 8 — Supply change-over classes . 28
Table 9 — Useful life classes . 32
Table 10 — Protective coating classes . 43
Table 11 — List of required documentation according to the class . 52
Table 12 — List of tests . 56
Table 13 — Interruptions of voltage supply classes . 59
Table 14 — Test voltages of voltage withstand test . 68
Table A.1 — Default requirements . 71
Table C.1 — Example of typical equipment locations on board rolling stock . 77
Table C.2 — Minimum severity of service conditions in different rolling stock locations . 78
Table D.1 — Test report compliance summary . 80
Table F.1 — Type and concentration of pollutants . 83
Table F.2 — Derating factor . 86
Table ZZ.1 — Correspondence between this European Standard, the TSI “Locomotives and
Passenger Rolling Stock” (REGULATION (EU) No 1302/2014 of 18 November 2014
) and
........................................................................................................................ 102
Directive 2008/57/EC
Table ZZ.2 — Correspondence between this European Standard, the CCS TSI (COMMISSION
REGULATION (EU) 2016/919 of 27 May 2016) and Directive 2008/57/EC . 103

Figures
Figure 1 — Roles and relationship of user and/or supplier . 11
Figure 2 — DC Power supply voltage range . 25
Figure 3 — Temporary DC power supply voltage fluctuation requirements . 26
Figure 4 — Styles of Test Plans . 31
Figure 5 — System interfacing with the typical EMC-areas A, B and C . 36
Figure 6 — Temporary supply overvoltages (a) . 57
Figure 7 — Temporary supply overvoltages (b) . 58
Figure 8 — Temporary supply dips . 58
Figure 9 — Interruption of supply voltage . 59
Figure 10 — Supply change-over Class C1 . 60
Figure 11 — Supply change-over Class C2 . 60
Figure 12 — Low temperature start-up test . 61
Figure 13 — Dry heat thermal test — Cycle A . 62
Figure 14 — Dry heat thermal test — Cycle B . 63
Figure 15 — Dry heat thermal test — Cycle C . 64
Figure 16 — Cyclic damp heat test: Description of the first 24-h cycle . 65
Figure 17 — Cyclic damp heat test: Recovery period . 66
Figure B.1 — Testing stages . 74
Figure C.1 — Typical equipment locations on board rolling stock . 76
Figure C.2 — Integration of the equipment into the vehicle cabinet . 79
Figure E.1 — Programmable component life cycle example . 82

European foreword
This document (EN 50155:2017) 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 (dop) 2018-04-13
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-10-13
standards conflicting with this document
have to be withdrawn
This document supersedes EN 50155:2007.
a) revision of Clause 1, Scope;
b) revision of Clause 2, Normative references;
c) revision of Clause 3, Terms, definitions and abbreviations, with reorganisation of subclauses;
d) improvement of Clause 4, General requirements, in terms of better wording, requirement
expansion and reorganisation of subclauses;
e) revision of Clause 5, Electrical service conditions, with reorganisation of subclauses;
f) improvement of Clause 6, Reliability, maintainability and expected useful life, with reorganization
of subclauses and introduction of explicative figures;
g) revision of Clause 7, Design;
h) introduction of a new Clause 8, Non-railway designed electronic equipment;
i) renumbering of previous Clause 8 to Clause 9, Components, and revision;
j) renumbering of previous Clause 9 to Clause 10, Construction, and introduction of new
requirements;
k) renumbering of previous Clause 10 to Clause 11, Safety, and improving of the wording;
l) renumbering of previous Clause 11 to Clause 12, Documentation, and introduction of new
requirements also considering new technologies;
m) renumbering of previous Clause 12 to Clause 13, Testing, text improvement with a particular
attention to table “List of tests” and introduction of explaining figures;
n) introduction of the following informative Annexes:
1) Annex A - List of default requirements of EN 50155 and related clauses;
2) Annex B - Testing approach;
3) Annex C - Severity of the service conditions in different rolling stock locations;
4) Annex D - Example of test report compliance summary;
5) Annex E - Life cycle model examples;
6) Annex F - Design guidelines for electronic hardware used on board of rolling stock;
7) Annex G - Non-railway designed electronic equipment;
o) 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 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 2008/57/EC amended by Commission Directive 2011/18/EU,
see informative Annex ZZ, which is an integral part of this document.
Introduction
This standard is applied in the design, manufacturing, testing of any electronic equipment installed on
board rolling stock.
It also describes the electrical and environmental operating conditions.
There are not correlations between the operating temperature classes listed in Table 1 and the air
temperature classes listed in EN 50125-1:2014, Table 2.
The aim of this standard is not to be a detailed guideline for the design of the electronic equipment;
the design is made under the responsibility of the supplier. The supplier should take into account the
requirements resulting from the specific location of the on board installation (see Annex C).
This standard contains the design, the documentation and the testing requirements.
The roles of user and/or supplier are shown in Figure 1 below.
SUPPLIER
USER
Railway
Manufacturer
undertaking
Integrator
Train staff
Purchaser
Maintainer
Figure 1 — Roles and relationship of user and/or supplier
1 Scope
This European Standard applies to all electronic equipment for control, regulation, protection,
diagnostic, energy supply, etc. installed on rail vehicles.
For the purpose of this European Standard, electronic equipment is defined as equipment mainly
composed of semiconductor devices and recognized associated components. These components will
mainly be mounted on printed boards.
Sensors (current, voltage, speed, etc.) and Semiconductor drive unit (SDU) for power electronic
devices are covered by this standard. Complete Semiconductor drive unit (SDU) and power
converters are covered by EN 61287-1.
This European Standard covers the conditions of operation, design requirements, documentation, and
testing of electronic equipment, as well as basic hardware and software requirements considered
necessary for compliant and reliable equipment.
Specific requirements related to practices necessary to ensure defined levels of functional safety will
be determined in accordance with relevant railway safety standards.
The software requirements for on board railway equipment are specified by EN 50657.
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 45545 (all parts), Railway applications — Fire protection on railway vehicles
EN 45545-2:2013+A1:2015, Railway applications — Fire protection on railway vehicles — Part 2:
Requirements for fire behaviour of materials and components
EN 50121-3-2:2016, 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
EN 50126-1:2017, Railway Applications — The Specification and Demonstration of Reliability,
Availability, Maintainability and Safety (RAMS) — Part 1: Generic RAMS Process
EN 50153:2014, Railway applications — Rolling stock — Protective provisions relating to electrical
hazards
EN 50163:2004, Railway applications — Supply voltages of traction systems (IEC 60850:2000, not
equivalent)
EN 50657:2017, Railway applications — Rolling stock applications — Software onboard of rolling
stock
EN 60068-2-1:2007, Environmental testing — Part 2-1: Tests — Test A: Cold (IEC 60068-2-1:2007)
EN 60068-2-2:2007, Environmental testing — Part 2-2: Tests — Test B: Dry heat (IEC 60068-2-
2:2007)
EN 60068-2-11:1999, Environmental testing — Part 2: Tests — Test Ka: Salt mist (IEC 60068-2-
11:1981)
EN 60068-2-30:2005, Environmental testing — Part 2-30: Tests — Test Db: Damp heat, cyclic (12 h +
12 h cycle) (IEC 60068-2-30:2005)
EN 60297 (all parts), Mechanical structures for electrical and electronic equipment — Dimensions of
mechanical structures of the 482,6 mm (19 in) series (IEC 60297 series)
E
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