BS EN ISO 13849-1:2008 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.

BS EN ISO 13849-1:2008 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.



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


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