BS EN 61508-3:2002 - Functional safety of electrical/ electronic/ programmable electronic safety-related systems. Software requirements – BSI British Standards

BS EN 61508-3:2002

Functional safety of electrical/ electronic/ programmable electronic safety-related systems. Software requirements

Status : Revised, Withdrawn   Published : June 1999 Replaced By : BS EN 61508-3:2010

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BS EN 61508-3:2002:

  • is intended to be utilised only after a thorough understanding of IEC 61508-1 and
    IEC 61508-2
  • applies to any software forming part of a safety-related system or used to develop a safetyrelated system within the scope of IEC 61508-1 and IEC 61508-2. Such software is termed safety-related software
    - Safety-related software includes operating systems, system software, software in communication networks, human-computer interface functions, support tools and
    firmware as well as application programs.
    - Application programs include high level programs, low level programs and special purpose programs in limited variability languages (see 3.2.7 of IEC 61508-4).
  • requires that the software safety functions and software safety integrity levels are specified.
    NOTE 1 – If this has already been done as part of the specification of the E/E/PE safety-related systems (see 7.2 of IEC 61508-2), then it does not have to be repeated in this part.
    NOTE 2 – Specifying the software safety functions and software safety integrity levels is an iterative procedure; see figures 2 and 6.
    NOTE 3 – See clause 5 and annex A of IEC 61508-1 for documentation structure. The documentation structure may take account of company procedures, and of the working practices of specific application sectors. 
  • establishes requirements for safety lifecycle phases and activities which shall be applied during the design and development of the safety-related software (the software safety lifecycle model). These requirements include the application of measures and techniques, which are graded against the safety integrity level, for the avoidance of and control of faults and failures in the software.
  • provides requirements for information relating to the software safety validation to be passed to the organisation carrying out the E/E/PES integration.
  • provides requirements for the preparation of information and procedures concerning software needed by the user for the operation and maintenance of the E/E/PE safetyrelated system.
  • provides requirements to be met by the organisation carrying out modifications to safetyrelated software.
  • provides, in conjunction with IEC 61508-1 and IEC 61508-2, requirements for support tools such as development and design tools, language translators, testing and debugging tools, configuration management tools.



Standard NumberBS EN 61508-3:2002
TitleFunctional safety of electrical/ electronic/ programmable electronic safety-related systems. Software requirements
StatusRevised, Withdrawn
Publication Date15 June 1999
Withdrawn Date25 June 2010
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Replaced ByBS EN 61508-3:2010
International RelationshipsEN 61508-3:2001,IEC 61508-3:1998
Amended ByAMD 10630
AMD 13781
AMD 10630 is a Corrigendum.
Draft Superseded By98/262287 DC
DescriptorsSafety engineering, Electrical equipment, Electrical components, Electronic equipment and components, Programmable, Computer applications, Safety devices, Equipment safety, Electrical safety, Computer software, Life cycle, Operating systems (computers), Interfaces (data processing), Computer programs, Programming languages, Communication networks, Design, Planning, Error detection, Failure (quality control), Acceptance (approval), Quality assurance, Maintenance, Modification, Verification, Performance testing, Selection, Data layout
ICS13.260
25.040.40
29.020
35.080
Title in FrenchSecurite fonctionnelle des systemes electriques/electroniques/electroniques programmables relatifs a la securite. Prescriptions concernant les logiciels
Title in GermanFunktionale Sicherheit sicherheitsbezogener elektrischer/elektronischer/programmierbarer elektronischer Systeme. Anforderungen an Software
CommitteeGEL/65/1
ISBN0 580 32720 5
PublisherBSI
FormatA4
DeliveryNo
Pages52
File Size623.6 KB
Price£254.00


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