CLC/TR 50542-2:2025

Railway applications - Driver's cab Train Display Controller (TDC) - Part 2: Display systems FIS

The scope of this document is the definition of the functional interface between TDC and DMIs. [Figure 1] The DMIs are those defined and considered in CLC/TR 50542 1:2025. The TDC is defined in CLC/TR 50542 1:2025. NOTE 1 The conversion of physical signals into numerical representation is out of scope. NOTE 2 The term DMI is used in this clause as synonym for display.

Bahnanwendungen - Train Display Controller (TDC) im Führerraum - Teil 2: Spezifikation der Funktionalen Schnittstelle(FIS) Anzeigesysteme

Applications ferroviaires - Contrôleur d'écrans de cabine (TDC) - Partie 2 : FIS de systèmes d’affichage

Železniške naprave - Krmilnik vlakovnega prikazovalnika v strojevodjevem prostoru (TDC) - 2. del: Sistemi za prikazovanje (FIS)

General Information

• Status: Published
• Publication Date: 17-Apr-2025
• ICS: 35.240.60 - IT applications in transport
• ICS: 45.020 - Railway engineering in general
• Technical Committee: CLC/TC 9X - Electrical and electronic applications for railways
• Drafting Committee: CLC/TC 9X/WG 12 - Communication means between safety equipment and man machine interface (mmi)
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 18-Apr-2025
• Due Date: 08-Dec-2025
• Completion Date: 18-Apr-2025
• Ref Project: SIST-TP CLC/TR 50542-2:2025 - Railway applications - Driver's cab Train Display Controller (TDC) - Part 2: Display systems FIS

Relations

• Replaces: CLC/TR 50542-2:2016 - Railway applications - Driver's cab Train Display Controller (TDC) - Part 2: Display systems FIS
• Effective Date: 05-Sep-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2025
Železniške naprave - Krmilnik vlakovnega prikazovalnika v strojevodjevem
prostoru (TDC) - 2. del: Sistemi za prikazovanje (FIS)
Railway applications - Driver's cab Train Display Controller (TDC) - Part 2: Display
systems FIS
Bahnanwendungen - Train Display Controller (TDC) im Führerraum - Teil 2: Spezifikation
der Funktionalen Schnittstelle(FIS) Anzeigesysteme
Applications ferroviaires - Contrôleur d'écrans de cabine (TDC) - Partie 2 : FIS de
systèmes d’affichage
Ta slovenski standard je istoveten z: CLC/TR 50542-2:2025
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 50542-2

RAPPORT TECHNIQUE
TECHNISCHER REPORT April 2025
ICS 35.240.60; 45.020 Supersedes CLC/TR 50542-2:2016
English Version
Railway applications - Driver's cab Train Display Controller
(TDC) - Part 2: Display systems FIS
Applications ferroviaires - Contrôleur d'écrans de cabine Bahnanwendungen - Train Display Controller (TDC) im
(TDC) - Partie 2 : FIS de systèmes d'affichage Führerraum - Teil 2: Spezifikation der Funktionalen
Schnittstelle(FIS) Anzeigesysteme

This Technical Report was approved by CENELEC on 2025-04-16.

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,
Türkiye 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC/TR 50542-2:2025 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 Operational functions . 7
6.3 Display Management functions . 9
Bibliography . 12

European foreword
This document (CLC/TR 50542-2:2025) has been prepared by CLC/TC 9X “Electrical and electronic
applications for railways”.
This document supersedes CLC/TR 50542-2:2016 and all of its amendments and corrigenda (if any).
CLC/TR 50542-2:2016:
— No technical changes.
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.
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.
Introduction
The extent of this document is the functional interface between the TDC and the displays. 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 displays and the TDC are considered only regarding their functionalities and not
as physical devices.
The CLC/TR 50542 series consists of three documents:
— CLC/TR 50542-1, Railway applications — Driver's cab Train Display Controller (TDC) — Part 1:
General architecture (this document);
— CLC/TR 50542-2, Railway applications — Driver's cab Train Display Controller (TDC) — Part 2:
Display systems FIS;
— CLC/TR 50542-3, Railway applications — Driver's cab Train Display Controller (TDC) — Part 3:
Other train systems FIS.
This series of documents is not a standard but the result of 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 50542-1:2025 and CLC/TR 50542-2:2025, this
document prevails.
1 Scope
The scope of this document is the definition of the functional interface between TDC and DMIs.

Key
1 TDC 4 ETD
2 CCD 5 TTD
3 TRD 6 functional interface
Figure 1 — TDC DMI functional architecture
The DMIs are those defined and considered in CLC/TR 50542-1:2025.
The TDC is defined in CLC/TR 50542-1:2025.
NOTE 1 The conversion of physical signals into numerical representation is out of scope.
NOTE 2 The term DMI is used in this clause as synonym for display.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org
3.1
input
information going from display to TDC
3.2
output
information going from the TDC to display
3.3
display
hardware device or system that shows text and/or graphic information to the user combined with input
device, possibly including a sound interface
Note 1 to entry: The sounds can be played by a separated sound generator.
[SOURCE: EN 16186-3:2022; modified “combined with input device, possibly including a sound
interface”]
4 Symbols and abbreviations
CCD Control Command Display
CCTV Closed Circuit Television
ETCS European Train Control System
ETD Electronic Timetable Display
FIS Functional Interface Specification
TDC Train Display Controller
TDS Train D
...