CENELEC
International Standards and Conformity Assessment
for all electrical, electronic and related technologies
Project
| Reference | EN 50128:2011 |
|---|---|
| Title | Railway applications - Communication, signalling and processing systems - Software for railway control and protection systems |
| Project Number | 20508 |
| Abstract/Scope | 1.1 This European Standard specifies the process and technical requirements for the development of software for programmable electronic systems for use in railway control and protection applications. It is aimed at use in any area where there are safety implications. These systems can be implemented using dedicated microprocessors, programmable logic controllers, multiprocessor distributed systems, larger scale central processor systems or other architectures. 1.2 This European Standard is applicable exclusively to software and the interaction between software and the system of which it is part. 1.3 This European Standard is not relevant for software that has been identified as having no impact on safety, i.e. software of which failures cannot affect any identified safety functions. 1.4 This European Standard applies to all safety related software used in railway control and protection systems, including – application programming, – operating systems, – support tools, – firmware. Application programming comprises high level programming, low level programming and special purpose programming (for example: Programmable logic controller ladder logic). 1.5 This European Standard also addresses the use of pre-existing software and tools. Such software may be used, if the specific requirements in 7.3.4.7 and 6.5.4.16 on pre-existing software and for tools in 6.7 are fulfilled. 1.6 Software developed according to any version of this European Standard will be considered as compliant and not subject to the requirements on pre-existing software. 1.7 This European Standard considers that modern application design often makes use of generic software that is suitable as a basis for various applications. Such generic software is then configured by data, algorithms, or both, for producing the executable software for the application. The general Clauses 1 to 6 and 9 of this European Standard apply to generic software as well as for application data or algorithms. The specific Clause 7 applies only for generic software while Clause 8 provides the specific requirements for application data or algorithms. 1.8 This European Standard is not intended to address commercial issues. These should be addressed as an essential part of any contractual agreement. All the clauses of this European Standard will need careful consideration in any commercial situation. 1.9 This European Standard is not intended to be retrospective. It therefore applies primarily to new developments and only applies in its entirety to existing systems if these are subjected to major modifications. For minor changes, only 9.2 applies. The assessor has to analyse the evidences provided in the software documentation to confirm whether the determination of the nature and scope of software changes is adequate. However, application of this European Standard during upgrades and maintenance of existing software is highly recommended. |
| Status |
Published
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Status
| Current Stage code | 6060 |
|---|---|
| Current Stage code date | 2011-06-17 |
| Current Stage code deadline | 2012-04-25 |
| Deadline date for vote | 2008-12-31 |
Legal
| Directive(s) | |
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| Mandate(s) | |
| Order Voucher |
Details
| IEC Technical Body | |
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| Reference Document | |
| ICS | 35.240.60 - IT applications in transport and trade 45.020 - Railway engineering in general 93.100 - Construction of railways |
| Keywords | Railway application; Communication; Signalling; Protection; Software |
| Note | 2011-03-21 - Publication editing allocated to svandriessche@cencenelec.eu * Supersedes EN 50128:2001 |
| A-Deviation(s) | |
| Special National Condition(s) |
Environment
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Clause
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Categories - Aspects
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Product Life Cycle
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Information
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History
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Stage
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Date
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Deadline Date
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Documents
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|---|---|---|---|
| 6060 | 2011-06-17 | 2012-04-25 |  EN FR DE |
| 5099 | 2011-04-25 | 2011-05-23 | |
| 5060 | 2011-03-21 | 2011-04-11 | EN |
| 5020 | 2011-01-14 | 2011-03-18 |  EN FR DE |
| 4099 | 2010-04-14 | 2010-09-30 | |
| 4060 | 2010-01-12 | 2010-05-12 | EN |
| 4020 | 2009-07-31 | 2010-01-08 | EN |
| 3099 | 2008-12-04 | 2009-08-22 | |
| 3020 | 2008-04-01 | 2008-07-31 | |
| 2020 | 2006-11-07 | 2008-04-30 | |
| 1099 | 2005-12-06 | 2006-06-06 |
Implementation Dates
| date of Ratification (DOR) (1) | 2011-04-25 |
|---|---|
| date of Availability (DAV) (2) | 2011-06-17 |
| date of Announcement (DOA) (3) | 2011-10-25 |
| date of Publication (DOP) (4) | 2012-04-25 |
| date of Withdrawal (DOW) (5) | 2014-04-25 |
Relations
| Supersedes | EN 50128:2001 |
|---|---|
| Superseded by | prEN 50126-5:2012 |
| Normative reference (6) |
(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat
(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level
(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement
(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn
(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.
