IEC 61375-2-8:2021

Electronic railway equipment - Train communication network (TCN) - Part 2-8: TCN conformance test

IEC 61375-2-8:2021 applies to all equipment and devices implemented according to IEC 61375-2-3:2015, IEC 61375-2-5:2014 and IEC 61375-3-4:2014, i.e. it covers the procedures to be applied to such equipment and devices when the conformance should be proven. The applicability of this document to a TCN implementation allows for individual conformance checking of the implementation itself, and is a pre-requisite for further interoperability checking between different TCN implementations.

Matériel électronique ferroviaire - Réseau embarqué de train (TCN) - Partie 2-8: Essai de conformité TCN

IEC 61375-2-8:2021 s'applique à l'ensemble des équipements et dispositifs mis en œuvre conformément à l'IEC 61375-2-3:2015, l'IEC 61375-2-5:2014 et l'IEC 61375-3-4:2014, c'est-à-dire qu'elle couvre les modes opératoires à appliquer à ces équipements et dispositifs dont il convient de démontrer la conformité.

General Information

• Status: Published
• Publication Date: 24-Oct-2021
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: TC 9 - Electrical equipment and systems for railways
• Drafting Committee: WG 43 - TC 9/WG 43
• Current Stage: PPUB - Publication issued
• Start Date: 05-Nov-2021
• Completion Date: 25-Oct-2021

Standards Content (Sample)

IEC 61375-2-8 ®
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
colour
inside
Electronic railway equipment – Train communication network (TCN) –
Part 2-8: TCN conformance test
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

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(IEV) online.
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further assistance, please contact the Customer Service
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IEC 61375-2-8 ®
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
colour
inside
Electronic railway equipment – Train communication network (TCN) –

Part 2-8: TCN conformance test

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 45.060.01 ISBN 978-2-8322-1035-5

– 2 – IEC 61375-2-8:2021 © IEC 2021
CONTENTS
FOREWORD . 14
INTRODUCTION . 16
1 Scope . 17
2 Normative references . 17
3 Terms, definitions, symbols and abbreviated terms . 19
3.1 Terms and definitions . 19
3.2 Symbols and abbreviated terms . 19
4 Conformance test: approach, requirements and boundaries . 20
4.1 Approach . 20
4.1.1 General . 20
4.1.2 Requirements . 20
4.1.3 Requirements declaration statements for an Item Under Test (IUT) . 22
4.2 Boundaries . 23
4.2.1 General . 23
4.2.2 Basic interconnection tests . 24
4.2.3 Capability tests . 24
4.2.4 Behaviour tests . 25
4.2.5 Conformance resolution tests . 25
4.2.6 Interpretation of clauses/subclauses and statements . 26
4.2.7 Relation to interoperability . 27
4.2.8 Relation to performance test . 28
4.2.9 Definition of test cases . 28
4.3 Conformance assessment process outline . 29
4.3.1 General . 29
4.3.2 Analysis of results, outcomes and verdicts . 29
4.4 Mapping of IUT types to conformance test suites . 30
5 Basic interface test . 31
5.1 Scope . 31
5.2 PICS pro-forma . 31
5.2.1 General . 31
5.2.2 PICS Tables . 31
5.3 Testing framework . 33
5.4 Physical layer test . 33
5.4.1 Test purpose . 33
5.4.2 Inspection of the Hardware Ethernet interface . 33
5.4.3 Inspection of the mechanical Ethernet interface construction . 33
5.4.4 Check of electrical Ethernet interface design . 34
5.4.5 Check of Ethernet interface characteristics . 34
5.4.6 Ethernet signal wave form test (IEEE standard) . 34
5.4.7 Ethernet signal wave form test (amplified signals, optional) . 34
5.4.8 Auto-Crossover- and Auto-Sensing-Test (only for switches) . 34
5.5 Basic communication protocol test . 35
5.5.1 Test purpose . 35
5.5.2 Simple communication test . 35
5.5.3 UDP rising payload test (only for End Devices) . 35
5.5.4 TCP rising payload test (only for End Devices) . 35

5.5.5 UDP long term test (only for End Devices) . 35
5.6 Communication reliability tests . 35
5.6.1 Test purpose . 35
5.6.2 Burst immunity test . 35
5.6.3 Ethernet interface isolation test . 36
6 Conformance test of End Device . 36
6.1 General . 36
6.2 Related requirements . 37
6.3 IUT and Test scope . 37
6.4 PICS Pro-forma . 38
6.4.1 General . 38
6.4.2 PICS Tables . 38
6.5 Testing framework . 44
6.6 Test Suite IEC 61375-2-3 . 46
6.6.1 Test case TCCT23ED_001 . 46
6.6.2 Test case TCCT23ED_002 . 47
6.6.3 Test case TCCT23ED_003 . 49
6.6.4 Test case TCCT23ED_004 . 50
6.6.5 Test case TCCT23ED_005 . 51
6.6.6 Test case TCCT23ED_006 . 52
6.6.7 Test case TCCT23ED_007 . 53
6.6.8 Test case TCCT23ED_008 . 54
6.6.9 Test case TCCT23ED_009 . 55
6.7 Test Suite IEC 61375-2-5 . 55
6.7.1 Test case TCCT25ED_001 . 55
6.7.2 Test case TCCT25ED_002 . 56
6.7.3 Test case TCCT25ED_003 . 57
6.7.4 Test case TCCT25ED_004 . 58
6.7.5 Test case TCCT25ED_005 . 59
6.7.6 Test case TCCT25ED_006 . 60
6.7.7 Test case TCCT25ED_007 . 61
6.7.8 Test case TCCT25ED_008 . 62
6.7.9 Test case TCCT25ED_009 . 63
6.7.10 Test case TCCT25ED_010 . 64
6.8 Test Suite IEC61375-3-4 . 65
6.8.1 Test case TCCT34ED_001 . 65
6.8.2 Test case TCCT34ED_002 . 66
6.8.3 Test case TCCT34ED_003 . 67
6.8.4 Test case TCCT34ED_004 . 68
6.8.5 Test case TCCT34ED_005 . 69
6.8.6 Test case TCCT34ED_006 . 70
6.8.7 Test case TCCT34ED_007 . 71
6.8.8 Test case TCCT34ED_008 . 72
6.8.9 Test case TCCT34ED_009 . 73
6.8.10 Test case TCCT34ED_010 . 74
6.8.11 Test case TCCT34ED_011 . 75
6.8.12 Test case TCCT34ED_012 . 76
6.8.13 Test case TCCT34ED_013 . 77
6.8.14 Test case TCCT34ED_014 . 78

– 4 – IEC 61375-2-8:2021 © IEC 2021
6.8.15 Test case TCCT34ED_015 . 79
6.8.16 Test case TCCT34ED_016 . 80
6.8.17 Test case TCCT34ED_017 . 81
6.8.18 Test case TCCT34ED_018 . 82
6.8.19 Test case TCCT34ED_019 .
...

IEC 61375-2-8 ®
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electronic railway equipment – Train communication network (TCN) –
Part 2-8: TCN conformance test

Matériel électronique ferroviaire – Réseau embarqué de train (TCN) –
Partie 2-8: Essai de conformité TCN
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

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questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

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CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
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IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
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If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: [e-mail].
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IEC 61375-2-8 ®
Edition 1.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electronic railway equipment – Train communication network (TCN) –

Part 2-8: TCN conformance test

Matériel électronique ferroviaire – Réseau embarqué de train (TCN) –

Partie 2-8: Essai de conformité TCN

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 45.060.01  ISBN 978-2-8322-7440-8

– 2 – IEC 61375-2-8:2021 © IEC 2021
CONTENTS
FOREWORD . 14
INTRODUCTION . 16
1 Scope . 17
2 Normative references . 17
3 Terms, definitions, symbols and abbreviated terms . 19
3.1 Terms and definitions . 19
3.2 Symbols and abbreviated terms . 19
4 Conformance test: approach, requirements and boundaries . 20
4.1 Approach . 20
4.1.1 General . 20
4.1.2 Requirements . 20
4.1.3 Requirements declaration statements for an Item Under Test (IUT) . 22
4.2 Boundaries . 23
4.2.1 General . 23
4.2.2 Basic interconnection tests . 24
4.2.3 Capability tests . 24
4.2.4 Behaviour tests . 25
4.2.5 Conformance resolution tests . 25
4.2.6 Interpretation of clauses/subclauses and statements . 26
4.2.7 Relation to interoperability . 27
4.2.8 Relation to performance test . 28
4.2.9 Definition of test cases . 28
4.3 Conformance assessment process outline . 29
4.3.1 General . 29
4.3.2 Analysis of results, outcomes and verdicts . 29
4.4 Mapping of IUT types to conformance test suites . 30
5 Basic interface test . 31
5.1 Scope . 31
5.2 PICS pro-forma . 31
5.2.1 General . 31
5.2.2 PICS Tables . 31
5.3 Testing framework . 33
5.4 Physical layer test . 33
5.4.1 Test purpose . 33
5.4.2 Inspection of the Hardware Ethernet interface . 33
5.4.3 Inspection of the mechanical Ethernet interface construction . 33
5.4.4 Check of electrical Ethernet interface design . 34
5.4.5 Check of Ethernet interface characteristics . 34
5.4.6 Ethernet signal wave form test (IEEE standard) . 34
5.4.7 Ethernet signal wave form test (amplified signals, optional) . 34
5.4.8 Auto-Crossover- and Auto-Sensing-Test (only for switches) . 34
5.5 Basic communication protocol test . 35
5.5.1 Test purpose . 35
5.5.2 Simple communication test . 35
5.5.3 UDP rising payload test (only for End Devices) . 35
5.5.4 TCP rising payload test (only for End Devices) . 35

5.5.5 UDP long term test (only for End Devices) . 35
5.6 Communication reliability tests . 35
5.6.1 Test purpose . 35
5.6.2 Burst immunity test . 35
5.6.3 Ethernet interface isolation test . 36
6 Conformance test of End Device . 36
6.1 General . 36
6.2 Related requirements . 37
6.3 IUT and Test scope . 37
6.4 PICS Pro-forma . 38
6.4.1 General . 38
6.4.2 PICS Tables . 38
6.5 Testing framework . 44
6.6 Test Suite IEC 61375-2-3 . 46
6.6.1 Test case TCCT23ED_001 . 46
6.6.2 Test case TCCT23ED_002 . 47
6.6.3 Test case TCCT23ED_003 . 49
6.6.4 Test case TCCT23ED_004 . 50
6.6.5 Test case TCCT23ED_005 . 51
6.6.6 Test case TCCT23ED_006 . 52
6.6.7 Test case TCCT23ED_007 . 53
6.6.8 Test case TCCT23ED_008 . 54
6.6.9 Test case TCCT23ED_009 . 55
6.7 Test Suite IEC 61375-2-5 . 55
6.7.1 Test case TCCT25ED_001 . 55
6.7.2 Test case TCCT25ED_002 . 56
6.7.3 Test case TCCT25ED_003 . 57
6.7.4 Test case TCCT25ED_004 . 58
6.7.5 Test case TCCT25ED_005 . 59
6.7.6 Test case TCCT25ED_006 .
...