SIST EN 61375-2-1:2012

Electronic railway equipment - Train communication network - Part 2-1: WTB - Wire Train Bus (IEC 61375-2-1:2012)

IEC 61375-2-1:2012 applies to data communication in Open Trains, i.e. it covers data communication between consists of the said open trains and data communication within the consists of the said open trains.

Elektronische Betriebsmittel für Bahnen - Zug-Kommunikations-Netzwerk - Teil 2-1: WTB - Wire Train Bus Konformitätsprüfung (IEC 61375-2-1:2012)

Matériel électronique ferroviaire - Réseau embarqué de train (TCN) - Partie 2-1: Bus de train filaire (WTB) (CEI 61375-2-1:2012)

La CEI 61375-2-1:2012 s'applique à la communication de données dans les Trains à Composition Variable, c'est-à-dire qu'elle couvre la communication de données aussi bien entre les rames que dans les rames desdits trains à composition variable.

Železniške elektronske naprave - Komunikacijsko omrežje vlaka - 2-1. del: Ožičeno podatkovno vodilo WTB (IEC 61375-2-1:2012)

Ta del standarda IEC 61375 se uporablja za podatkovno komunikacijo v odprtih vlakih, tj. zajema podatkovno komunikacijo med kompozicijami navedenih odprtih vlakov in podatkovno komunikacijo v kompozicijah navedenih odprtih vlakov. Uporaba tega standarda za ožičeno podatkovno vodilo (WTB) omogoča interoperabilnost posameznih kompozicij odprtih vlakov v mednarodnem prometu. Podatkovno vodilo v kompozicijah (npr. večnamensko podatkovno vodilo vozila (MVB)) je navedeno kot priporočljiva rešitev za uporabo navedenega komunikacijskega omrežja vlaka (TCN). V vsakem primeru mora združljivost ožičenega podatkovnega vodila s predlaganim omrežjem kompozicije dokazati dobavitelj.

General Information

• Status: Published
• Publication Date: 23-Sep-2012
• ICS: 45.020 - Railway engineering in general
• Technical Committee: ŽEN - Electrical applications for railways
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 30-Aug-2012
• Due Date: 04-Nov-2012
• Completion Date: 24-Sep-2012
• Directive: 2001/16/EC - Directive 2001/16/EC of the European Parliament and of the Council of 19 March 2001 on the interoperability of the trans-European conventional rail system
• Directive: 2008/57/EC - Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)
• Directive: 2016/797/EU - Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union (Text with EEA relevance)
• Directive: 96/48/EC - Interoperability of the trans-European high-speed rail system
• Mandate: M/483 - Mandate for programming and standardisation addressed to the European standardisation bodies under directive 2008/57/EC in the field of the interoperability of the rail system within the European Union
• Ref Project: EN 61375-2-1:2012 - Electronic railway equipment - Train communication network (TCN) - Part 2-1: Wire Train Bus (WTB)

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2012
äHOH]QLãNHHOHNWURQVNHQDSUDYH.RPXQLNDFLMVNRRPUHåMHYODNDGHO2åLþHQR
SRGDWNRYQRYRGLOR:7%,(&
Electronic railway equipment - Train communication network - Part 2-1: WTB - Wire Train
Bus (IEC 61375-2-1:2012)
Elektronische Betriebsmittel für Bahnen - Zug-Kommunikations-Netzwerk - Teil 2-1: WTB
- Wire Train Bus Konformitätsprüfung (IEC 61375-2-1:2012)
Matériel électronique ferroviaire - Réseau embarqué de train (TCN) - Partie 2-1: Bus de
train filaire (WTB) (CEI 61375-2-1:2012)
Ta slovenski standard je istoveten z: EN 61375-2-1:2012
ICS:
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 61375-2-1
NORME EUROPÉENNE
August 2012
EUROPÄISCHE NORM
ICS 45.060
English version
Electronic railway equipment -
Train communication network (TCN) -
Part 2-1: Wire Train Bus (WTB)
(IEC 61375-2-1:2012)
Matériel électronique ferroviaire -  Elektronische Betriebsmittel für Bahnen -
Réseau embarqué de train (TCN) - Zug-Kommunikations-Netzwerk -
Partie 2-1: Bus de Train Filaire (WTB) Teil 2-1: WTB - Wire Train Bus
(CEI 61375-2-1:2012) Konformitätsprüfung
(IEC 61375-2-1:2012)
This European Standard was approved by CENELEC on 2012-07-26. 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.

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

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61375-2-1:2012 E
Foreword
The text of document 9/1642/FDIS, future edition 1 of IEC 61375-2-1, prepared by IEC/TC 9 "Electrical
equipment and systems for railways" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 61375-2-1:2012.
The following dates are fixed:
(dop) 2013-04-26
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-07-26
• latest date by which the national
standards conflicting with the
document have to be withdrawn
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.
Endorsement notice
The text of the International Standard IEC 61375-2-1:2012 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60870-5-1 NOTE  Harmonized as EN 60870-5-1.

- 3 - EN 61375-2-1:2012
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60571 - Electronic equipment used on rail vehicles - -

IEC 60807 Series Rectangular connectors for frequencies below - -
3 MHz
IEC 61375-1 - Electronic railway equipment - Train EN 61375-1 -
communication network -
Part 1: TCN - Train Communication Network
general architecture
IEC 61375-2-2 2012 Electronic railway equipment - Train EN 61375-2-2 2012
communication network (TCN) -
Part 2-2: Wire Train Bus conformance testing

IEC 61375-3-1 - Electronic railway equipment - Train EN 61375-3-1 -
communication network (TCN) -
Part 3-1: Multifunction Vehicle Bus (MVB)

ISO/IEC 8802-2 - Information technology - Telecommunications - -
and information exchange between systems -
Local and metropolitan area networks -
Specific requirements -
Part 2: Logical link control
ISO/IEC 8824 Series Information technology - Abstract Syntax - -
Notation One (ASN.1)
ISO/IEC 8825 Series Information technology - ASN.1 encoding - -
rules
ISO/IEC 8859-1 - Information technology - 8-bit single-byte - -
coded graphic character sets -
Part 1: Latin alphabet No.1
ISO/IEC 9646 Series Information technology - Open Systems - -
Interconnection - Conformance testing
methodology and framework
ISO/IEC 10646 - Information technology - Universal multiple-- -
octet coded character set (UCS)

ISO/IEC 13239 - Information technology - Telecommunications - -
and information exchange between systems -
High-level data link control (HDLC)
procedures
ITU-T - List of definitions for interchange circuits - -
Recommendation between data terminal equipment (DTE) and
V.24 data circuit-terminating equipment (DCE)

ITU-T - Specification and Description Language (SDL)- -
Recommendation
Z.100
Publication Year Title EN/HD Year
IEEE 754 - Binary floating-point arithmetic - -

UIC CODE 556 - Information transmission in the train (train-- -
bus)
UIC CODE 557 - Diagnostics on passenger rolling stock - -

- 5 - EN 61375-2-1:2012
Annex ZZ
(informative)
Coverage of Essential Requirements of EU Directives

This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers all
relevant essential requirements as given in Annex III of the EU Directive 2008/57/EC.

Compliance with this standard provides one means of conformity with the specified essential
requirements of the Directive concerned.

WARNING: Other requirements and other EU Directives may be applicable to the products falling within
the scope of this standard.
IEC 61375-2-1 ®
Edition 1.0 2012-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electronic railway equipment – Train communication network (TCN) –

Part 2-1: Wire Train Bus (WTB)

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

Partie 2-1: Bus de Train Filaire (WTB)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XP
CODE PRIX
ICS 45.060 ISBN 978-2-88912-067-3

– 2 – 61375-2-1 ¤ IEC:2012
CONTENTS
FO REW O RD . 11
INT RODUCT ION . 13
1 Scope . 15
2 Normative references. 15
3 Terms and definitions, abbreviations, convent ions . 16
3.1 Terms and definitions . 16
3.2 Abbreviations . 32
3.3 Conventions . 34
3.3.1 Base of numeric values . 34
3.3.2 Naming conventions. 34
3.3.3 Time naming conventions . 34
3.3.4 Procedural interface conventions . 35
3.3.5 Specification of transmitted data . 37
3.3.6 State diagram conventions . 39
3.4 General considerations . 40
3.4.1 Interface between equipment . 40
3.4.2 Interface between c ons is ts . 40
3.4.3 Real-Time Protocols . 40
3.4.4 Network Management . 41
3.4.5 Configurations . 41
3.4.6 Structure of a standard device . 42
3.5 Conformance test . 45
4 Physical layer . 46
4.1 Topology . 46
4.1.1 Bus sections . 46
4.1.2 Couplers . 46
4.1.3 Nodes . 46
4.1.4 Consist orientation . 46
4.1.5 Consist specification (informal) . 47
4.2 Medium specifications . 48
4.2.1 Topology . 48
4.2.2 Duplicated medium (option) . 48
4.2.3 Bus Configuration rules . 49
4.2.4 Cable specification . 50
4.2.5 Shielding concept . 51
4.2.6 T erm inator . 52
4.3 Medium attachment . 53
4.3.1 Node connection points identification . 53
4.3.2 Direct node attachment . 53
4.3.3 Indirect node attachment . 54
4.3.4 Connector (optional) . 54
4.4 Node specifications . 55
4.4.1 Node elements. 55
4.4.2 Node and switch settings . 57
4.4.3 Duplicated Line Units (option) . 57
4.5 Line Unit specifications . 58

61375-2-1 ¤ IEC:2012 – 3 –
4.5.1 Galvanic separation . 58
4.5.2 Insertion losses of a Line Unit . 58
4.5.3 Switches specifications . 59
4.5.4 Shield connection to a Line Unit . 59
4.5.5 Fritting (option) . 60
4.6 Transceiver specifications. 61
4.6.1 Conventions . 61
4.6.2 Transmitter . 61
4.6.3 Receiver specifications . 64
4.7 Medium-dependent signalling . 66
4.7.1 Frame encoding and decoding . 66
4.7.2 Duplicated line handling (option) . 69
4.7.3 Line Unit interface . 71
5 Link Layer Control . 72
5.1 Addressing . 72
5.2 Frames and telegrams . 73
5.2.1 Frame_Data format . 73
5.2.2 Telegram timing . 74
5.2.3 Elements of the HDLC Frame. 76
5.2.4 Link Control Field . 77
5.2.5 Handling of ‘Attention’, ‘Change’ and ‘Inhibit’ . 80
5.2.6 Size, FCS and protocol errors . 80
5.3 Telegram formats and protocols . 80
5.3.1 Link Data field . 80
5.3.2 Process Data . 81
5.3.3 Message Data . 83
5.3.4 Supervisory Data . 84
5.3.5 Detection telegram . 85
5.3.6 Presence telegram . 87
5.3.7 Status telegram . 88
5.3.8 Set to Intermediate telegram . 90
5.3.9 Naming telegram . 91
5.3.10 Unname telegram . 93
5.3.11 Set to End telegram . 93
5.3.12 Topography telegram . 95
5.4 Medium allo c a tion . 97
5.4.1 Organisation . 97
5.4.2 Periodic Phase . 98
5.4.3 Sporadic phase . 99
5.5 Inauguration . 99
5.5.1 General . 99
5.5.2 Descriptors . 101
5.5.3 Detection of other compositions (informal) . 105
5.5.4 State diagrams of the inauguration . 108
5.6 Link layer interface . 148
5.6.1 Link layer layering . 148
5.6.2 Link Process_Data_Interface . 149
5.6.3 Link Message_Data_Interface . 150
5.6.4 Link management interface . 150

– 4 – 61375-2-1 ¤ IEC:2012
6 Real-Time protocols . 161
6.1 General . 161
6.1.1 Contents of this clause . 161
6.1.2 Structure of this clause . 162
6.2 Variables – Services and Protocols . 163
6.2.1 General . 163
6.2.2 Link layer Interface for Process_Data . 163
6.2.3 Application interface for Proc es s _ Variables . 169
6.3 Messages Services and Pr otoc ols . 184
6.3.1 General . 184
6.3.2 Reference station. 184
6.3.3 Message packets handling . 187
6.3.4 Message Link layer . 189
6.3.5 Message Network Layer . 199
6.3.6 Message transport layer . 211
6.3.7 Multicast Transport Protocol (option) . 242
6.3.8 Message session layer . 258
6.3.9 Message Presentation Layer . 260
6.3.10 Message Application layer . 260
6.4 Presentation and encoding of transmitted and stored data . 281
6.4.1 Purpose . 281
6.4.2 Data ordering . 282
6.4.3 Notation for the primitive types . 283
6.4.4 Structured types. 290
6.4.5 Alignment . 299
6.4.6 Notation for special types . 299
7 Application Layer . 301
7.1 Process Data Marshalling . 301
7.1.1 Marshalling Types . 301
7.1.2 Marshalling Modes . 301
7.1.3 Data Paths in PDM . 302
7.1.4 PDM Operation . 303
7.1.5 PDM Functions . 304
7.2 WTB Line Fault Location Detection . 306
7.2.1 Architecture . 307
7.2.2 Protocol Overview . 308
7.2.3 LFLD Sequence . 309
7.2.4 End Node State Machine (Testing Node) . 311
7.2.5 Intermediate Node State Machine (Segmenting Node) . 311
7.2.6 Disturbed Line selec tion . 311
7.2.7 Location Detection . 311
8 Train Network Management . 313
8.1 General . 313
8.1.1 Contents of this clause . 313
8.1.2 Structure of this clause . 314
8.2 Manager, Agents and in ter f ac es . 314
8.2.1 Manager and Agent . 314
8.2.2 Management messages protocol . 314
8.2.3 Interfaces . 315

61375-2-1 ¤ IEC:2012 – 5 –
8.3 Managed objects . 317
8.3.1 Object Attributes . 317
8.3.2 Station objects . 317
8.3.3 WTB link objec ts . 320
8.3.4 Variable objects . 321
8.3.5 Messenger objects . 323
8.3.6 Domain objects . 324
8.3.7 Task objects . 324
8.3.8 Clock object . 325
8.3.9 Journal object . 325
8.3.10 Equipment object . 326
8.4 Services and management messages . 326
8.4.1 Notation for all management messages . 326
8.4.2 Station services . 331
8.4.3 WTB link services . 338
8.4.4 Variables services . 350
8.4.5 Messages services . 360
8.4.6 Domain services . 369
8.4.7 Task services . 374
8.4.8 Clock services . 376
8.4.9 Journal Service . 377
8.4.10 Equipment Service . 379
8.5 Interface Procedures . 380
8.5.1 Manager interface (MGI) . 380
8.5.2 Agent interface . 381
Bibliography . 384

Figure 1 – Wire Train Bus . 13
Figure 2 – Layering of the TCN . 14
Figure 3 – State transition example . 39
Figure 4 – Interfaces between equipment . 40
Figure 5 – Interfaces between consists . 40
Figure 6 – Train Bus and Consist network . 41
Figure 7 – TCN configurations . 42
Figure 8 – TCN WTB device configuration options . 43
Figure 9 – Train Composition (two Intermediate Nodes shown) . 46
Figure 10 – Vehicle measurement . 47
Figure 11 – Connected nodes in regular operation . 48
Figure 12 – Double-line attachment . 49
Figure 13 – Grounded shield concept . 52
Figure 14 – Floating shield concept . 52
Figure 15 – Terminator . 53
Figure 16 – Direct node attachment (optional double-line) . 53
Figure 17 – Indirect attachment . 54
Figure 18 – WTB connector, front view . 55
Figure 19 – Example of MAU Structure . 56

– 6 – 61375-2-1 ¤ IEC:2012
Figure 20 – Node with redundant Line Units . 58
Figure 21 – Attenuation measurement . 59
Figure 22 – Shield grounding in the Line Unit . 60
Figure 23 – Fritting source and load . 60
Figure 24 – Transmitter fixtures . 62
Figure 25 – Pulse wave form at transmitter . 63
Figure 26 – Signal and idling at transmitter . 64
Figure 27 – Receiver signal envelope . 65
Figure 28 – Receiver edge distortion . 66
Figure 29 – Idealised frame on the line (16 bit Preamble shown) . 67
Figure 30 – Bit encoding. 67
Figure 31 – Preamble . 67
Figure 32 – End Delimit er . 68
Figure 33 – Valid frame, RxS, CS and SQE signals . 69
Figure 34 – Garbled frame, RxS, CS, SQE signals . 69
Figure 35 – Redundant Lines (as seen at a receiver) . 70
Figure 36 – Line_Disturbance signals . 71
Figure 37 – HDLC Frame structure . 73
Figure 38 – Telegram timing . 74
Figure 39 – Example of Interframe spacing . 75
Figure 40 – Frame spacing measured at the master side . 76
Figure 41 – Frame spacing at the slave . 76
Figure 42 – HDLC Data format . 77
Figure 43 – Format of HDLC Data . 77
Figure 44 – Process Data telegram . 81
Figure 45 – Format of Process Data Request . 82
Figure 46 – Format of Process Data Response . 83
Figure 47 – Message Data telegram . 83
Figure 48 – Format of Message Data Request . 83
Figure 49 – Format of Message Data Response . 84
Figure 50 – Supervisory telegram . 84
Figure 51 – Detection telegram. 85
Figure 52 – Format of Detect Request . 86
Figure 53 – Format of Detect Response . 86
Figure 54 – Presence telegram . 87
Figure 55 – Format of Presence Request . 87
Figure 56 – Format of Presence Response . 88
Figure 57 – Status telegram . 88
Figure 58 – Format of Status Request . 89
Figure 59 – Format of Status Response . 90
Figure 60 – Set-to-Intermediate telegram . 90
Figure 61 – Format of SetInt Request . 90
Figure 62 – Format of SetInt Response . 91

61375-2-1 ¤ IEC:2012 – 7 –
Figure 63 – Naming telegram . 91
Figure 64 – Format of Naming Request . 92
Figure 65 – Format of Naming Response . 92
Figure 66 – Unnaming telegram. 93
Figure 67 – Format of Unname Request . 93
Figure 68 – Set to End telegram . 93
Figure 69 – Format of SetEnd Request . 94
Figure 70 – Format of SetEnd Response . 94
Figure 71 – Topography telegram . 95
Figure 72 – Format of Topography Request . 95
Figure 73 – Format of Topography Response . 96
Figure 74 – Structure of the Basic Period . 97
Figure 75 – Node position numbering . 100
Figure 76 – Format of Node Descriptor . 101
Figure 77 – Format of Node Report . 102
Figure 78 – Format of User Report . 102
Figure 79 – Format of Composition St r ength . 103
Figure 80 – Master_Report . 104
Figure 81 – Format of Topo Counter . 104
Figure 82 – Format of Master Topo . 105
Figure 83 – Timing Diagram of detection protocol . 107
Figure 84 – Major node states and application settings . 108
Figure 85 – Node processes (End Setting) . 109
Figure 86 – AUXILIARY_PROCESS states . 115
Figure 87 – NAMING_RESPONSE macro . 116
Figure 88 – States of MAIN PROCESS . 117
Figure 89 – Macro ‘START_NODE’ . 120
Figure 90 – Procedure REQUEST_RESPONSE . 122
Figure 91 – Procedures ‘SET_TO_INT’ and ‘SET_TO_END’ . 123
Figure 92 – Macro ‘INIT_MASTER’ . 124
Figure 93 – Macro ‘NAMING_MASTER’ . 125
Figure 94 – Macro ASK_END . 126
Figure 95 – Procedure NAME_ONE . 129
Figure 96 – Macro TEACHING_MASTER . 131
Figure 97 – Macro ‘UNNAMING_MASTER’ . 132
Figure 98 – Macro ‘REGULAR_MASTER’ . 134
Figure 99 – Macro CHECK_DESC . 135
Figure 100 – Macro PERIODIC_POLL . 137
Figure 101 – Macro MESSAGE_POLL . 138
Figure 102 – States ‘UNNAMED_SLAVE’ . 140
Figure 103 – States ‘NAMED_SLAVE’ . 142
Figure 104 – Macro ‘LEARNING_SLAVE’. 144
Figure 105 – Macro ‘REGULAR_SLAVE’. 146

– 8 – 61375-2-1 ¤ IEC:2012
Figure 106 – Link layer layering . 148
Figure 107 – Structure of the Train Communication Network . 161
Figure 108 – Real-Time Protocols layering . 162
Figure 109 – LPI primitives exchange . 166
Figure 110 – Check_Variable . 171
Figure 111 – Individual access . 175
Figure 112 – Set access . 179
Figure 113 – Cluster access . 182
Figure 114 – Terminal station . 184
Figure 115 – Router station between WTB and MVB . 185
Figure 116 – Gateway station between WTB and Consist network . 186
Figure 117 – Packet format . 188
Figure 118 – Link layer data transmission . 190
Figure 119 – Link_Message_Data_Interface (LMI) . 191
Figure 120 – Example of MVB Message_Data frame . 192
Figure 121 – Example of WTB Message_Data frame . 193
Figure 122 – LMI primitives . 194
Figure 123 – Network layer on a Node . 200
Figure 124 – Encoding of the Network_Address .
...