prEN 50129:2024
(Main)Railway Application - Communication, signalling and processing system - Safety related electronic systems for signalling
Railway Application - Communication, signalling and processing system - Safety related electronic systems for signalling
Unchanged with respect to the current edition EN 50129:2018
Bahnanwendungen - Telekommunikationstechnik, Signaltechnik und Datenverarbeitungssysteme - Sicherheitsrelevante elektronische Systeme für Signaltechnik
Applications ferroviaires - Systèmes de signalisation, de télécommunication et de traitement - Systèmes électroniques de sécurité pour la signalisation
Železniške naprave - Komunikacijski, signalni in procesni sistemi - Signalno-varnostni elektronski sistemi
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2025
Železniške naprave - Komunikacijski, signalni in procesni sistemi - Signalno-
varnostni elektronski sistemi
Railway Application - Communication, signalling and processing system - Safety related
electronic systems for signalling
Bahnanwendungen - Telekommunikationstechnik, Signaltechnik und
Datenverarbeitungssysteme - Sicherheitsrelevante elektronische Systeme für
Signaltechnik
Applications ferroviaires - Systèmes de signalisation, de télécommunication et de
traitement - Systèmes électroniques de sécurité pour la signalisation
Ta slovenski standard je istoveten z: prEN 50129:2024
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.
EUROPEAN STANDARD DRAFT
prEN 50129
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2024
ICS Will supersede EN 50129:2018; EN
50129:2018/AC:2019-04
English Version
Railway Application - Communication, signalling and processing
system - Safety related electronic systems for signalling
Applications ferroviaires - Systèmes de signalisation, de Bahnanwendungen - Telekommunikationstechnik,
télécommunication et de traitement - Systèmes Signaltechnik und Datenverarbeitungssysteme -
électroniques de sécurité pour la signalisation Sicherheitsrelevante elektronische Systeme für
Signaltechnik
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2025-02-07.
It has been drawn up by CLC/SC 9XA.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CENELEC 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, 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 77513 Ref. No. prEN 50129:2024 E
Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 19
4 Overall framework of this document . 20
5 Requirements for developing safety-related electronic systems . 21
5.1 General . 21
5.2 The quality management process . 22
5.3 The safety management process . 25
5.3.1 General . 25
5.3.2 Guideline for structuring documentation . 25
5.3.3 Safety life cycle . 26
5.3.4 Safety organization . 27
5.3.5 Safety plan . 28
5.3.6 Hazard log. 29
5.3.7 Safety requirements specification . 29
5.3.8 System design for safety . 29
5.3.9 Safety operation and maintenance plan . 30
5.3.10 Safety verification . 30
5.3.11 Safety validation . 31
5.3.12 Safety qualification tests . 32
5.3.13 Management of safety-related application conditions . 33
5.3.14 Safety justification . 35
5.3.15 Independent safety assessment . 35
6 Requirements for elements following different life cycles . 36
6.1 General . 36
6.2 Use of pre-existing items . 36
6.2.1 General . 36
6.2.2 Requirements for use of complete pre-existing systems . 37
6.2.3 Requirements for use of pre-existing equipment . 37
6.3 Safety-related tools for electronic systems . 38
6.4 Physical security and cybersecurity . 40
7 The safety case: structure and content . 41
7.1 The safety case structure . 41
7.2 The technical safety report . 43
7.3 Generic and specific safety cases . 52
7.4 Provisions for the specific application safety case . 53
7.5 Dependencies between safety cases . 54
8 System safety acceptance and subsequent phases . 54
8.1 System safety acceptance process . 54
8.2 Operation, maintenance and performance monitoring . 58
8.3 Modification and retrofit . 58
8.4 Decommissioning and disposal . 58
Annex A (normative) Safety integrity levels . 59
A.1 General . 59
A.2 Safety requirements . 59
A.3 Safety integrity . 60
A.4 Determination of safety integrity requirements . 61
A.4.1 General . 61
A.4.2 Risk assessment . 62
A.4.3 Hazard control . 64
A.4.4 Identification and treatment of new hazards arising from design . 70
A.5 Allocation of SILs . 70
A.5.1 General aspects . 70
A.5.2 Relationship between SIL and associated TFFR . 71
Annex B (normative) Management of faults for safety-related functions . 73
B.1 General . 73
B.2 General concepts . 74
B.2.1 Detection and negation times . 74
B.2.2 Composition of two independent items . 75
B.3 Effects of faults . 76
B.3.1 Effects of single faults . 76
B.3.2 Independence of items. 78
B.3.3 Detection of single faults . 83
B.3.4 Action following detection (retention of safe state) . 86
B.3.5 Effects of multiple faults . 87
B.3.6 Defence against systematic faults . 91
Annex C (normative) Identification of hardware component failure modes . 92
C.1 General . 92
C.2 General procedure . 92
C.3 Procedure for integrated circuits . 92
C.4 Procedure for components with inherent physical properties . 93
C.5 General provisions concerning component failure modes .
...
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