SIST-TP CLC/TR 50542-3:2017

Railway applications - Driver's cab train Display Controller (TDC) - Part 3: Other train systems FIS

The scope of this document is the definition of the functional interface between TDC and other train systems. These other train systems are the train systems (different from ETCS (Subset 121) and DMIs) from the TDC point of view.
The functional interface deals with data exchanged between TDC and these train systems.
The TDC is defined in document CLC/TR 50542-1.

Bahnanwendungen - Display-Steuereinheit (TDC) für Führerräume - Teil 3: Andere Zugsysteme - Spezifikation der Funktionalen Schnittstelle (FIS)

Železniške naprave - Krmilnik vlakovnega prikazovalnika v strojevodjevem prostoru (TDC) - 3. del: Drugi vlakovni sistemi (FIS)

Področje uporabe tega dokumenta je definicija funkcijskega vmesnika med TDC in drugimi vlakovnimi sistemi. Ti drugi vlakovni sistemi so vlakovni sistemi (ki se razlikujejo od ETCS (podskupina 121) in DMI-jev) z vidika TDC.
Funkcijski vmesnik obravnava izmenjavo podatkov med TDC in temi vlakovnimi sistemi.
TDC je opredeljen v dokumentu CLC/TR 50542-1.

General Information

• Status: Published
• Publication Date: 13-Mar-2017
• ICS: 35.240.60 - IT applications in transport
• ICS: 45.020 - Railway engineering in general
• Technical Committee: ŽEN - Electrical applications for railways
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-Mar-2017
• Due Date: 11-May-2017
• Completion Date: 14-Mar-2017
• Ref Project: CLC/TR 50542-3:2016 - Railway applications - Driver's cab train Display Controller (TDC) - Part 3: Other train systems FIS

Overview

SIST-TP CLC/TR 50542-3:2017 is a CENELEC technical report focusing on the functional interface between the Train Display Controller (TDC) and other train systems (OTS) within railway applications. It excludes interfaces related to the European Train Control System (ETCS), Driver-Machine Interfaces (DMIs), and ATP systems. This document defines how data is exchanged functionally between the TDC and various onboard train systems such as braking, HVAC, traction, and CCTV. The TDC itself is detailed in the related document CLC/TR 50542-1.

The standard aims to facilitate interoperability and modular integration, encouraging multiple suppliers and easier maintenance or system upgrades in driver’s cab environments. Although it provides a functional interface specification (FIS), it does not specify physical signal conversions or transmission performance parameters.

Key Topics

Functional Interface Definition

• Specifies how TDC and other train systems communicate via inputs, outputs, and bidirectional data exchange.
• Focuses on functional data exchange rather than physical hardware connections.

Data Exchange Functions

• State: OTS send their status data to TDC (e.g., parking brake applied) used to inform display systems.
• Command: TDC sends control requests to OTS (e.g., door open command with parameters).
• Provide Video: OTS supply video feeds such as CCTV streams to TDC for driver monitoring.
• Management Functions (Optional): Includes TDS status updates and OTS state reporting to improve system diagnostics.

Interrelation With Other Standards

• Complements other parts of the CLC/TR 50542 series-Part 1 covers general architecture, Part 2 focuses on display systems.
• Interfaces related to ETCS and display definitions are handled in other specific standards (e.g., Subset 121 for ETCS).

Use of Clear Terminology

• Terms like Input, Output, State, Command, and Functional Interface Specification (FIS) are clearly defined for consistency.

Applications

This standard serves railway equipment manufacturers, system integrators, and operators aiming to:

• Enhance Interoperability: By defining clear functional interfaces, it enables components from different suppliers to work together seamlessly in driver cabs.
• Streamline Upgrades and Maintenance: Simplifies replacing or refurbishing TDCs and train systems, reducing life cycle costs and downtime.
• Facilitate Modern Train Control Systems: Supports integration of complex systems such as braking, door control, HVAC, and internal/external CCTV within driver displays.
• Support Rolling Stock Development: Encourages new vehicle designs with modular, interoperable onboard control and display elements.

For example, a train’s braking system can communicate parking brake status to the TDC, which then displays the information in the driver’s cab. Similarly, the TDC can command the door system to open doors with movable steps while receiving video feeds from exterior cameras, enhancing operational safety and driver awareness.

Related Standards

• CLC/TR 50542-1:2014: Defines the general architecture of the Train Display Controller (TDC) system.
• CLC/TR 50542-2:2016: Focuses on the interaction between the TDC and display systems (FIS for displays).
• Subset 121 (DMI-EVC Interface): Covers the interface between the Driver-Machine Interface and ETCS onboard systems, excluded from this report’s scope.
• EN 16186-3: Pertains to design and ergonomics of driver cab displays in railway applications.
• Technical Specifications for Interoperability (TSI): Governs interoperability rules including CCS (Control Command Signalling) related to safety and performance in European rail networks.

Summary

SIST-TP CLC/TR 50542-3:2017 provides a foundational functional framework for interactions between the Train Display Controller and other critical onboard train systems. By standardizing these interfaces, it fosters flexible, safe, and maintainable driver cab systems, accelerating innovation and reducing integration complexity in modern railway operations. It is a key reference for stakeholders involved in train control system design, refurbishment, and lifecycle management seeking improved system interoperability and reduced total cost of ownership.

Keywords: CLC/TR 50542-3, Train Display Controller, Driver’s cab, Functional Interface Specification, Other Train Systems, Railway applications, TDC, Train control, Train system interoperability, CCTV integration, Train safety systems, ETCS, Railway standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2017
Železniške naprave - Krmilnik vlakovnega prikazovalnika v strojevodjevem
prostoru (TDC) - 3. del: Drugi vlakovni sistemi (FIS)
Railway applications - Driver's cab train Display Controller (TDC) - Part 3: Other train
systems FIS
Ta slovenski standard je istoveten z: CLC/TR 50542-3:2016
ICS:
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
45.020 Železniška tehnika na Railway engineering in
splošno general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL REPORT CLC/TR 50542-3

RAPPORT TECHNIQUE
TECHNISCHER BERICHT
December 2016
ICS 35.240.60; 45.020
English Version
Railway applications - Driver's cab train Display Controller (TDC)
- Part 3: Other train systems FIS
Bahnanwendungen - Train Display Controller (TDC) im
Führerraum - Teil 3: Spezifikation der Funktionalen
Schnittstelle (FIS) Andere Zugsysteme

This Technical Report was approved by CENELEC on 2016-11-21.

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.

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
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC/TR 50542-3:2016 E

CEN/TR 50542-3:2016 (E)
Contents Page
European foreword .3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .5
4 Symbols and abbreviations .6
5 General principles.6
6 Functions .7
6.1 General .7
6.2 State .7
6.3 Command .7
6.4 Provide Video .8
6.5 Management functions (optional) .8
6.5.1 TDS Status .8
6.5.2 OTS Status .8
6.6 Relationship between CLC/FprTR 50542-2:2016 and CLC/FprTR 50542-3:2016 .9
Annex A (informative) Examples of OTS functions . 10
Bibliography . 11

CEN/TR 50542-3:2016 (E)
European foreword
This document (CLC/TR 50542-3:2016) has been prepared by CLC/TC 9X ”Electrical and electronic
applications for railways”.
This document is currently submitted to voting in accordance with the Internal Regulations, Part 2, Subclause
11.4.3.3 (simple majority) for acceptance as a CENELEC Technical Report.
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.
CEN/TR 50542-3:2016 (E)
Introduction
The perimeter of CLC/TR 50542-3 is the functional interface between the Other Train Systems (OTS) and the
TDC.
The functional definition of this interface is a key feature in the process to increase market development, for
instance:
— by introducing more suppliers for new rolling stock development and for driver's cab refurbishment.
— by easing the control of maintenance and the replacement processes.
— by decreasing the related equipment Life cycle cost.
In this document, the train borne systems and the TDC are considered only regarding their functionalities and
not as physical devices.
The CLC/TR 50542 series consists of three documents:
— this document
— CLC/TR 50542-1, Railway applications — Driver's cab Train Display Controller (TDC) — Part 1: General
architecture.
— CLC/TR 50542-2, Railway applications — Driver's cab Train Display Controller (TDC) — Part 2: Display
systems FIS.
These documents should not be interpreted as standards but as a study on the future view of the system.
They do not describe an existing solution for the TDS.
These documents are not written to be used in call for tenders because they are not sufficient. However they
can serve as a basis for future development and standardization including new technologies. These
documents are a first step, and may be completed later.
NOTE In case of existing discrepancies between CLC/TR 50542–1:2014 and CLC/TR 50542–3:2016, the present
document prevails.
CEN/TR 50542-3:2016 (E)
1 Scope
The scope of this document is the definition of the functional interface between TDC and other train systems.
These “Other Train Systems” are the train systems interfacing with the TDC excluding the displays
(CLC/TR 50542-2), ETCS/STM onboard (Subset-121) and already designed class B ATP systems.
The functional interface deals with data exchanged between TDC and these train systems.
The TDC is defined in docu
...