The requirements for safety related control systems has changed dramatically during the last few years. This has resulted in much confusion as there are four different families of standards that may apply. Electronic and software based safety controllers are becoming increasingly popular and as a result, new standards have been published to cover this new technology in addition to the traditional electrical, mechanical, pneumatic and hydraulic technologies.  These new standards can be difficult to follow and companies can spend hours trying to interpret them.  Applying an unsuitable standard can result in excessive analysis being performed.

Fountain Safety Solutions can provide training and/or consultancy helping you to:

 

wiring
Standards Applicable to Safety-Critical Systems
Standard Series Classification Applies To
EN ISO 13849 Performance Levels A - E.  Categories B, 1, 2, 3 & 4 apply to circuit architecture in a secondary role Mechanical, hydraulic, pneumatic, electrical, electronics and software of machinery.  EN ISO 13849-1: 2006 is now published and replaces EN 954 - 1 which will become obsolete from November 2009.
EN 61508 SIL 1 - 4 Electrical, electronics and software of all systems and equipment.
EN 62061 SIL 1 - 3 Electrical, electronics and software of machinery.  It is a condensed version of EN 61508 specifically for machinery.
EN 61511 SIL 1 - 4 Electrical, electronics and software of process industry safety critical systems.  It is a condensed version of EN 61508 specifically for the process industry.