This standard includes principles of design, construction and testing of safety logic assemblies used in protection systems.
It assumes that the principles set out in IEC Publication 231 A: First supplement to IEC Publication 231: General Principles of Nuclear Reactor Instrumentation, are to be applied and gives recommen-dations for their implementation.
It includes provisions for acceptance and in operating testing, reliability criteria and protection from external influences.
Safety logic functions performed within the safety logic assemblies are not included.