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Railway applications. Communication, signalling and processing systems. Safety-related communication in transmission systems
This document is applicable to safety-related electronic systems using for digital communication purposes a transmission system which was not necessarily designed for safety-related applications.
For transmission systems where the risk of unauthorized access is not negligible, the document defines the interface to the applicable cybersecurity standards.
Both safety-related equipment and non-safety-related equipment can be connected to the transmission system.
This document gives the specific requirements needed to achieve safety-related communication between safety-related equipment connected to the transmission system, while the general system requirements including allocation of safety requirements and content of the safety case are defined in EN 50129.
This document is not applicable to existing systems which had already been accepted prior to the release of this document. However, so far as reasonably practicable, it is applicable to modifications and extensions to existing systems, subsystems and equipment.
This document does not specify:
A safety-related equipment connected through an open transmission system can be subjected to many different cybersecurity threats, against which an overall program is defined encompassing management, technical and operational aspects.
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