iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
CLC

EN 50126-2:2017/A1:2024

(Amendment)

Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 2: Systems approach to safety

Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 2: Systems approach to safety

Scope remains the same as EN50126-2:2017

Bahnanwendungen - Spezifikation und Nachweis von Zuverlässigkeit, Verfügbarkeit, Instandhaltbarkeit und Sicherheit (RAMS) - Teil 2: Systembezogene Sicherheitsmethodik

Applications ferroviaires - Spécification et démonstration de la fiabilité, de la disponibilité, de la maintenabilité et de la sécurité (FDMS) - Partie 2: Approche systématique pour la sécurité

Železniške naprave - Specifikacija in prikaz zanesljivosti, razpoložljivosti, vzdrževalnosti in varnosti (RAMS) - 2. del: Sistemski pristop k varnosti - Dopolnilo A1

General Information

Status
Published
Publication Date
14-Nov-2024
ICS
45.020 - Railway engineering in general
Technical Committee
CLC/TC 9X - Electrical and electronic applications for railways
Drafting Committee
CLC/TC 9X/WG 21 - Revision of EN 50126-1 & -2
Current Stage
6060 - Document made available - Publishing
Start Date
15-Nov-2024
Due Date
10-Oct-2024
Completion Date
15-Nov-2024
Directive
2016/797/EU - Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union (Text with EEA relevance)
Mandate
M/483 - Mandate for programming and standardisation addressed to the European standardisation bodies under directive 2008/57/EC in the field of the interoperability of the rail system within the European Union
M/591 - Standardisation request to the European Committee for Standardisation and the European Committee for Electrotechnical Standardisation as regards railway products in support of Directive (EU) 2016/797
Ref Project
SIST EN 50126-2:2018/A1:2025 - Railway Applications - The Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 2: Systems Approach to Safety

Relations

Amends
EN 50126-2:2017 - Railway Applications - The Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 2: Systems Approach to Safety
Effective Date
08-Mar-2022

Buy Standard

EN 50126-2:2018/oprA1:2023EN 50126-2:2018/oprA1:2023
PreviousNext
Draft
EN 50126-2:2018/oprA1:2023
English language
8 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)


SLOVENSKI STANDARD
SIST EN 50126-2:2018/oprA1:2023
01-april-2023
Železniške naprave - Specifikacija in prikaz zanesljivosti, razpoložljivosti,
vzdrževalnosti in varnosti (RAMS) - 2. del: Sistemski pristop k varnosti - Dopolnilo
A1
Railway Applications - The Specification and Demonstration of Reliability, Availability,
Maintainability and Safety (RAMS) - Part 2: Systems Approach to Safety
Bahnanwendungen - Spezifikation und Nachweis von Zuverlässigkeit, Verfügbarkeit,
Instandhaltbarkeit und Sicherheit (RAMS) - Teil 2: Systembezogene Sicherheitsmethodik
Applications ferroviaires - Spécification et démonstration de la fiabilité, de la disponibilité,
de la maintenabilité et de la sécurité (FDMS) - Partie 2: Approche systématique pour la
sécurité
Ta slovenski standard je istoveten z: EN 50126-2:2017/prA1
ICS:
03.120.01 Kakovost na splošno Quality in general
45.020 Železniška tehnika na Railway engineering in
splošno general
SIST EN 50126-2:2018/oprA1:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 50126-2:2018/oprA1:2023

SIST EN 50126-2:2018/oprA1:2023

EUROPEAN STANDARD DRAFT
EN 50126-2:2017
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
February 2023
ICS 45.020 -
English Version
Railway Applications - The Specification and Demonstration of
Reliability, Availability, Maintainability and Safety (RAMS) - Part
2: Systems Approach to Safety
Applications ferroviaires - Spécification et démonstration de Bahnanwendungen - Spezifikation und Nachweis von
la fiabilité, de la disponibilité, de la maintenabilité et de la Zuverlässigkeit, Verfügbarkeit, Instandhaltbarkeit und
sécurité (FDMS) - Partie 2: Approche systématique pour la Sicherheit (RAMS) - Teil 2: Systembezogene
sécurité Sicherheitsmethodik
This draft amendment prA1, if approved, will modify the European Standard EN 50126-2:2017; it is submitted to CENELEC members for
enquiry.
Deadline for CENELEC: 2023-04-28.

It has been drawn up by CLC/TC 9X.

If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.

This draft amendment 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 75808 Ref. No. EN 50126-2:2017/prA1 E

SIST EN 50126-2:2018/oprA1:2023
EN 50126-2:2017/prA1:2023 (E)
Contents Page
European foreword . 3
1 Modification to references . 4
2 Modification to Clause 2, "Normative References" . 4
3 Modification to Clause 10, "Apportionment of functional Safety Integrity requirements" . 4
4 Modification to Annex ZZ . 4

SIST EN 50126-2:2018/oprA1:2023
EN 50126-2:2017/prA1:2023 (E)
European foreword
This document (EN 50126-2:2017/prA1:2023) has been prepared by Technical Committee CLC/TC 9X
“Electrical and electronic applications for railways”, the secretariat of which is held by France.
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)

This document has been prepared under a Standardization Request given to CENELEC by the European
Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s)
/ Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an integral part of this
document.
SIST EN 50126-2:2018/oprA1:2023
EN 50126-2:2017/prA1:2023 (E)
1 Modification to references
Throughout the text replace EN 50126-1 with EN 50126-1:2017, and EN 50126-1:2017 with
EN 50126-1:2017, .
2 Modification to Clause 2, "Normative References"
Replace the following reference:
EN 50126-1:2017, Railway Applications — The Specification and Demonstration of Reliability, Availability,
Maintainability and Safety (RAMS) — Part 1: Generic RAMS Process
with the following new reference:
EN 50126-1:2017, Railway Applications — The Specification and Demonstration of Reliability, Availability,
Maintainability and Safety (RAMS) — Part 1: Generic RAMS Process
3 Modification to Clause 10, "Apportionment of functional Safety Integrity
requirements"
Replace the following text:
-5 -1
"In case the derived TFFR is less demanding (higher) than 10 [h ], the function shall be given the attribute of
“basic integrity”, with related requirements defined in 10.2.11."
with the following text:
-5 -1
“In case the derived TFFR is equal to 10 [h ] or higher (less demanding), the function shall be given the
attribute of “basic integrity”, with related requirements defined in 10.2.11.”
4 Modification to Annex ZZ
Replace the entire Annex ZZ with the following:

As amended by EN 50126-1:2017/prA1:2023.
SIST EN 50126-2:2018/oprA1:2023
EN 50126-2:2017/prA1:2023 (E)
“
Annex ZZ
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive (EU) 2016/797 aimed to be covered
This European Standard has been prepared under a Commission’s standardisation request “M/483 Mandate to
CEN and CENELEC for Standardisation in the field of interoperability of the rail system" to provide one voluntary
means of conforming to (parts of) Essential Requirements of Directive (EU) 2016/797 of the European
Parliament and of the Council of 11 May 2016 on interoperability of the rail system (recast) as specified in the
relevant technical specifications for interoperability (TSI).
Once this standard is cited in the Official Journal of the European Union under that Directive, compliance with
the normative clauses of this standard given in Table ZZ.1 for control-command and signalling, Table ZZ.2 for
locomotive and passenger RST and Table ZZ.3 for freight wagons RST confers, within the limits of the scope
of this standard, a presumption of conformity with
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

CLC
EN 50126-1:2017/A1:2024(Amendment)
Railway applications - The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 1: Generic RAMS process
SIST EN 50126-1:2018/A1:2025

This part 1 of EN 50126 - considers RAMS, understood as reliability, availability, maintainability and safety and their interaction; - considers the generic aspects of the RAMS life cycle. The guidance in this part can still be used in the application of specific standards; - defines: - a process, based on the system life cycle and tasks within it, for managing RAMS; - a systematic process, tailorable to the type and size of the system under consideration, for specifying requirements for RAMS and demonstrating that these requirements are achieved; - addresses railway specifics; - enables conflicts between RAMS elements to be controlled and managed effectively; - does not define: - RAMS targets, quantities, requirements or solutions for specific railway applications; - rules or processes pertaining to the certification of railway products against the requirements of this standard; - an approval process for the railway stakeholders. This part 1 of EN 50126 is applicable to railway application fields, namely Command, Control and Signalling, Rolling Stock and Fixed Installations, and specifically: - to the specification and demonstration of RAMS for all railway applications and at all levels of such an application, as appropriate, from complete railway systems to major systems and to individual and combined subsystems and components within these major systems, including those containing software; in particular: - to new systems; - to new systems integrated into existing systems already accepted, but only to the extent and insofar as the new system with the new functionality is being integrated. It is otherwise not applicable to any unmodified aspects of the existing system; - as far as reasonably practicable, to modifications and extensions of existing systems already accepted, but only to the extent and insofar as existing systems are being modified. It is otherwise not applicable to any unmodified aspect of the existing system; - at all relevant phases of the life cycle of an application; - for use by railway duty holders and the railway suppliers. It is not required to apply this standard to existing systems which remain unmodified, including those systems already compliant with any former version of EN 50126. The process defined by this European Standard assumes that railway duty holders and railway suppliers have business-level policies addressing Quality, Performance and Safety. The approach defined in this standard is consistent with the application of quality management requirements contained within EN ISO 9001.

  • Draft
    13 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
CLC/TS 50701:2023(Main)
Railway applications - Cybersecurity
SIST-TS CLC/TS 50701:2024

This document provides railway operators, system integrators and product suppliers, with guidance and specifications on how cybersecurity will be managed in the context of EN 50126 1 RAMS lifecycle process. This document aims at the implementation of a consistent approach to the management of the security of the railway systems. This document can also be applied to the security assurance of systems and components/equipment developed independently of EN 50126 1:2017. This document applies to Communications, Signalling and Processing domain, to Rolling Stock and to Fixed Installations domains. It provides references to models and concepts from which requirements and recommendations can be derived and that are suitable to ensure that the residual risk from security threats is identified, supervised and managed to an acceptable level by the railway system duty holder. It presents the underlying security assumptions in a structured manner. This document does not address functional safety requirements for railway systems but rather additional requirements arising from threats and related security vulnerabilities and for which specific measures and activities need to be taken and managed throughout the lifecycle. The aim of this document is to ensure that the RAMS characteristics of railway systems / subsystems / equipment cannot be reduced, lost or compromised in the case of cyber attacks. The security models, the concepts and the risk assessment process described in this document are based on or derived from the IEC/EN IEC 62443 series. This document is consistent with the application of security management requirements contained within IEC 62443 2 1, which in turn are based on EN ISO/IEC 27001 and EN ISO 27002.

  • Technical specification
    164 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 50488:2021(Main)
Railway applications - Fixed installations - Electrical protective measures for working on or near an overhead contact line system and/or its associated return circuit
SIST EN 50488:2021

This document provides requirements for electrical safety for: - dead working on an overhead contact line system; - working activities near an overhead contact line system when it is live. It applies to all work activities in relation to electrical hazards only. This document is applicable to overhead contact line systems with the following nominal voltages: - 1,5 kV and 3 kV dc; - 15 kV, 2x15 kV, 25 kV and 2x25 kV ac. It also provides requirements for work activities that can give rise to electrical hazards from the return circuit. This document does not cover electrical risk arising from: - live working on overhead contact line systems (live working can be carried out according to national requirements and practices); - working on or near other electrical sources. If there are no other rules or procedures, this document could be applied to overhead contact line systems with other nominal voltages.

  • Standard
    39 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Standard
    39 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 50128:2011/A2:2020(Amendment)
Railway applications - Communication, signalling and processing systems - Software for railway control and protection systems
SIST EN 50128:2011/A2:2020

Unchanged with respect to the current edition EN 50128:2011. Scope of the amendment: - Alignment with EN 50126-1:2017, EN 50126-2:2017 and EN 50129:2018 together with minor corrections

  • Amendment
    14 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 50128:2011/A1:2020(Amendment)
Railway applications - Communication, signalling and processing systems - Software for railway control and protection systems
SIST EN 50128:2011/A1:2020

2021: CLC legacy converted by DCLab NISOSTS

  • Amendment
    4 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 50159:2010/A1:2020(Amendment)
Railway applications - Communication, signalling and processing systems - Safety-related communication in transmission systems
SIST EN 50159:2010/A1:2020

2021: CLC legacy converted by DCLab NISOSTS

  • Amendment
    4 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 50121-5:2017/A1:2019(Amendment)
Railway applications - Electromagnetic compatibility - Part 5: Emission and immunity of fixed power supply installations and apparatus
SIST EN 50121-5:2017/A1:2020

This European Standard applies to emission and immunity aspects of EMC for electrical and electronic apparatus and systems intended for use in railway fixed installations for power supply. This includes the power feed to the apparatus, the apparatus itself with its protective control circuits, trackside items such as switching stations, power autotransformers, booster transformers, substation power switchgear and power switchgear to other longitudinal and local supplies. Filters operating at railway system voltage (for example, for harmonic suppression or power factor correction) are not included in this standard since each site has special requirements. Filters would normally have separate enclosures with separate rules for access. If electromagnetic limits are required, these will appear in the specification for the equipment. If a port is intended to transmit or receive for the purpose of radio communication (intentional radiators, e.g. transponder systems), then the radiated emission requirement in this standard are not intended to be applicable to the intentional transmission from a radio-transmitter as defined by the ITU. The frequency range considered is from DC to 400 GHz. No measurements need to be performed at frequencies where no requirement is specified. Emission and immunity limits are given for items of apparatus which are situated: a) within the boundary of a substation which delivers electric power to a railway; b) beside the track for the purpose of controlling or regulating the railway power supply, including power factor correction; c) along the track for the purpose of supplying electrical power to the railway other than by means of the conductors used for contact current collection, and associated return conductors. Included are high voltage feeder systems within the boundary of the railway which supply substations at which the voltage is reduced to the railway system voltage; d) beside the track for controlling or regulating electric power supplies to ancillary railway uses. This category includes power supplies to marshalling yards, maintenance depots and stations; e) various other non-traction power supplies from railway sources which are shared with railway traction. The immunity levels given in this standard apply for: - vital equipment such as protection devices; - equipment having connections to the traction power conductors; - apparatus inside the 3 m zone; - ports of apparatus inside the 10 m zone with connection inside the 3 m zone; - ports of apparatus inside the 10 m zone with cable length > 30 m. Apparatus and systems which are in an environment which can be described as residential, commercial or light industry, even when placed within the physical boundary of the railway substation, shall comply with EN 61000-6-1:2007 for immunity and EN 61000-6-3:2007 for emission requirements. Excluded from the immunity requirements of this standard is power supply apparatus which is intrinsically immune to the tests defined in Tables 1 to 6. NOTE An example is an 18 MVA 230 kV to 25 kV power supply transformer. These specific provisions are to be used in conjunction with the general provisions in EN 50121-1. This part of the standard covers requirements for both apparatus and fixed installations. The sections for fixed installations are not relevant for CE marking.

  • Amendment
    3 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 50121-4:2016/A1:2019(Amendment)
Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus
SIST EN 50121-4:2017/A1:2019

This European Standard applies to signalling and telecommunication apparatus that is installed inside the railway environment. Signalling and telecommunication apparatus mounted in vehicles is covered by EN 50121-3-2:2016, signalling and telecommunication apparatus installed inside the substation and connected to substation equipment is covered by EN 50121-5:2016. This European Standard specifies limits for emission and immunity and provides performance criteria for signalling and telecommunications (S&T) apparatus (including power supply systems belonging to S&T) which may interfere with other apparatus inside the railway environment, or increase the total emissions for the railway environment and so risk causing Electro-Magnetic Interference (EMI) to apparatus outside the railway system. The requirements specified in this standard apply for: — vital equipment such as interlocking or command and control; — apparatus inside the 3 m zone; — ports of apparatus inside the 10 m zone with connection inside the 3 m zone; — ports of apparatus inside the 10 m zone with cable length > 30 m. Other apparatus not covered by at least one of these given cases should be in compliance with EN 61000-6-2. If a port is intended to transmit or receive for the purpose of radio communication (intentional radiators, e.g. transponder systems), then the radiated emission requirement in this standard are not intended to be applicable to the intentional transmission from a radio-transmitter as defined by the ITU. Immunity limits do not apply in the exclusion bands as defined in the corresponding EMC related standard for radio equipment. The standard does not specify basic personal safety requirements for apparatus such as protection against electric shock, unsafe operation, insulation co-ordination and related dielectric tests. The requirements were developed for and are applicable to this set of apparatus when operating under normal conditions. Fault conditions of the apparatus have not been taken into account. The frequency range considered is from DC to 400 GHz. No measurements need to be performed at frequencies where no requirement is specified. For products in the scope of EN 61000-3-2, EN 61000-3-3, EN 61000-3-11 or EN 61000-3-12 the requirements of those standards also apply. These specific provisions are to be used in conjunction with the general provisions in EN 50121-1:2016. The immunity and emission levels do not of themselves guarantee that the integration of apparatus will necessarily be satisfactory. The standard cannot cover all the possible configurations of the apparatus, but the test levels are sufficient to achieve satisfactory EMC in the majority of cases.

  • Amendment
    3 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
CLC/TR 50542-1:2018(Main)
Railway applications - Driver's cab train display controller (TDC) - Part 1: General architecture
SIST-TP CLC/TR 50542-1:2019

In accordance with the ERTMS/ETCS specifications, Subset 121, UIC 612 leaflet, ERA_ERTMS_015560 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): [figure] Figure 1 - Functional architecture The scope of this document is to define the functional architecture around the TDC. This Technical Report excludes the following items: - Communication protocols (e.g. EN 61375 series); - Ergonomic aspects; - Interface with ETCS (Subset 121); - Train functions; - GSM-R EIRENE functions; - Use of the displays as terminals for maintenance purpose.

  • Technical report
    20 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 50126-2:2017(Main)
Railway Applications - The Specification and Demonstration of Reliability, Availability, Maintainability and Safety (RAMS) - Part 2: Systems Approach to Safety
SIST EN 50126-2:2018

This part 2 of EN 50126 - considers the safety-related generic aspects of the RAMS life-cycle; - defines methods and tools which are independent of the actual technology of the systems and subsystems; - provides: - the user of the standard with the understanding of the system approach to safety which is a key concept of EN 50126; - methods to derive the safety requirements and their safety integrity requirements for the system and to apportion them to the subsystems; - methods to derive the safety integrity levels (SIL) for the safety-related electronic functions. NOTE This standard does not allow the allocation of safety integrity levels to non-electronic functions. - provides guidance and methods for the following areas: - safety process; - safety demonstration and acceptance; - organisation and independence of roles; - risk assessment; - specification of safety requirements; - apportionment of functional safety requirements; - design and implementation. - provides the user of this standard with the methods to assure safety with respect to the system under consideration and its interactions; - provides guidance about the definition of the system under consideration, including identification of the interfaces and the interactions of this system with its subsystems or other systems, in order to conduct the risk analysis; - does not define: - RAMS targets, quantities, requirements or solutions for specific railway applications; - rules or processes pertaining to the certification of railway products against the requirements of this standard; - an approval process by the safety authority. This part 2 of EN 50126 is applicable to railway applications fields, namely Command, Control and Signalling, Rolling Stock and Fixed Installations, and specifically: - to the specification and demonstration of safety for all railway applications and at all levels of such an application, as appropriate, from complete railway systems to major systems and to individual and combined sub-systems and components within these major systems, including those containing software, in particular: - to new systems; - to new systems integrated into existing systems already accepted, but only to the extent and insofar as the new system with the new functionality is being integrated. It is otherwise not applicable to any unmodified aspects of the existing system; - as far as reasonably practicable, to modifications and extensions of existing systems accepted prior to the creation of this standard, but only to the extent and insofar as existing systems are being modified. It is otherwise not applicable to any unmodified aspect of the existing system; - at all relevant phases of the life-cycle of an application; - for use by railway duty holders and the railway suppliers. It is not required to apply this standard to existing systems which remain unmodified, including those systems already compliant with any former version of EN 50126. The process defined by this European Standard assumes that railway duty holders and railway suppliers have business-level policies addressing Quality, Performance and Safety. The approach defined in this standard is consistent with the application of quality management requirements contained within EN ISO 9001.

  • Standard
    77 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Standard
    87 pages
    French language
    sale 10% off
    e-Library read for
    1 day