Standard Number: BS EN ISO 13849-1-2008
Title: Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design (ISO 13849-1:2006)
Replaced by Standard: BS EN ISO 13849-1-2015
Publication Date: 2009/6/30
Execute Date: 2009/6/30
Adopted International Standard: EN ISO 13849-1-2008,IDT;ISO 13849-1-2006,IDT
Publisher: British Standards
Number of Pages:98P.;A4
Preface:Equipment safety, Occupational safety, Control systems, Control equipment, Safety devices, Design, Safety measures, Classification systems, Grades (quality), Reliability, Risk assessment, Computer software, Computerized control, Automatic control systems, Electronic equipment and components, Defects, Instructions for use
Description:This part of ISO 13849 provides safety requirements and guidance on the principles for the design and
integration of safety-related parts of control systems (SRP/CS), including the design of software. For these
parts of SRP/CS, it specifies characteristics that include the performance level required for carrying out safety
functions. It applies to SRP/CS, regardless of the type of technology and energy used (electrical, hydraulic,
pneumatic, mechanical, etc.), for all kinds of machinery.
It does not specify the safety functions or performance levels that are to be used in a particular case.
This part of ISO 13849 provides specific requirements for SRP/CS using programmable electronic system(s).
It does not give specific requirements for the design of products which are parts of SRP/CS. Nevertheless, the
principles given, such as categories or performance levels, can be used.
NOTE 1 Examples of products which are parts of SRP/CS: relays, solenoid valves, position switches, PLCs, motor
control units, two-hand control devices, pressure sensitive equipment. For the design of such products, it is important to
refer to the specifically applicable International Standards, e.g. ISO 13851, ISO 13856-1 and ISO 13856-2.
NOTE 2 For the definition of required performance level, see 3.1.24.
NOTE 3 The requirements provided in this part of ISO 13849 for programmable electronic systems are compatible with
the methodology for the design and development of safety-related electrical, electronic and programmable electronic
control systems for machinery given in IEC 62061.
NOTE 4 For safety-related embedded software for components with PLr = e see IEC 61508-3-1998, Clause 7.
NOTE 5 See also Table 1.
Cross References:ISO 12100-1-2003;ISO 12100-2-2003;ISO 13849-2-2003;ISO 14121;IEC 60050-191-1990;IEC 60050-191-1990/AMD 1-1999;IEC 60050-191-1990/AMD 2-2002;IEC 61508-3-1998;IEC 61508-3-1998/Corrigendum 1-1999;IEC 61508-4-1998;IEC 61508-4-1998/Corrigendum 1-1999;IEC 61000-4-4;IEC 61496-1;IEC 61496-2;IEC 61496-3;IEC 61508-1-1998;IEC 61508-2-2000;IEC 61508-5-1998;IEC 61508-6-2000;IEC 61508-7-2000;IEC 62061;ISO/FDIS 13850;ISO 13851;ISO 13856-1;ISO 13856-2;ISO 11428;ISO 9001;ISO 9355-1;ISO 9355-2;ISO 9355-3;ISO 11429;ISO 7731;ISO 4413;ISO 4414;ISO 13855-2000;ISO 14118;ISO 19973;IEC 60204-1-2005;IEC 60447;IEC 60529;IEC 60812;IEC 60947;IEC 61000-6-2;IEC 61800-3;IEC 61810;IEC 61300;IEC 61310;IEC 61131-3;EN 457;EN 614-1;EN 982;EN 983;EN 1005-3;EN 1088;EN 50205;SN 29500;IEC/TR 62380;98/37/EC;98/79/EC;2006/42/EC
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
4 Design considerations
5 Safety functions
6 Categories and their relation to MTTF[d] of each channel,
DC[avg] and CCF
7 Fault consideration, fault exclusion
10 Technical documentation
11 Information for use
Annex A (informative) - Determination of required performance
Annex B (informative) - Block method and safety-related block
Annex C (informative) - Calculating or evaluating MTTF[d]
values for single components
Annex D (informative) - Simplified method for estimating
MTTF[d] for each channel
Annex E (informative) - Estimates for diagnostic coverage
(DC) for functions and modules
Annex F (informative) - Estimates for common cause failure
Annex G (informative) - Systematic failure
Annex H (informative) - Example of combination of several
safety-related parts of the control system
Annex I (informative) - Examples
Annex J (informative) - Software
Annex K (informative) - Numerical representation of Figure 5
Annex ZA (informative) - Relationship between this European
Standard and the Essential Requirements of EU
Directive 98/37/EC, amended by Directive 98/79/EC
Annex ZB (informative) - Relationship between this European
Standard and the Essential Requirements of EU
: PDF(Acrobat Reader) or Word version doc
Tile in English: Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design (ISO 13849-1:2006)