Fault Consideration & Fault Exclusion ISO 13849 – 1, Chapter 7 [1, 7] discusses the need for fault consideration and fault exclusion. Fault consideration is the process of examining the components and sub-systems used in the safety-related part of the control system (SRP/CS) and making a list of all the faults that could occur in each one. This a definitely non-trivial […]
Safety-Related Software Up to this point, I have been discussing the basic processes used for the design of safety-related parts of control systems. The underlying assumption is that these techniques apply to the design of hardware used for safety purposes. The remaining question focuses on the design and development of safety-related software that runs on that […]
CE Marking Wire and Cable In an earlier post, I wrote about the requirements for CE Marking wire and cable and discussed the <HAR> mark. In 2016, the Construction Products Regulation 305/2011 (CPR) came into effect, replacing the Construction Products Directive 89/106/EEC. The CPR included provisions covering any kind of materials that could be used in […]