scope:

In accordance with the ERTMS/ETCS specifications, Subset 121, UIC 612 leaflet, ERA ERTMS-015560 3.3.0 document, EN 50126 and EN 61375 series requirements, this Technical Report describes the Train Display System (TDS) in the driver's cab, and the link between the TDS/TDC and some of its interfaces (Blue box and blue links only):

The scope of the Train Display System (TDS) thus includes:

a) Functions, except functions defined in the ETCS Subset 121. These functions describe exchanges between TDC and the connected display systems;

b) Performance allocation (RAMS included as per EN 50126): for each function defined in item

a), defining the performances needed and the degraded modes recovering; c) Needs for certification: description of special requirements to avoid ETCS recertification after other display system modification; d) Train Display Controller (TDC):

Redundancy management; 

Architecture;

e) For each system connected (except those defined in ETCS Subset 121): the Functional Interface Specification (FIS).

This Technical Report excludes the following items: 

• Communication protocols (e.g. EN 61375 series); 
• Ergonomic aspects; 
• Interface with ETCS (Subset 121); 
• Train functions; 
• GSMR EIRENE functions;
•  Use of the displays as terminals for maintenance purpose.