Architectural constraints are limitations that are imposed on the hardware selected to implement a safety-instrumented function, regardless of the performance calculated for a subsystem. Architectural constraints are specified (in) according to the required of the subsystem, type of components used, and of the subsystem’s components. (Type A components are simple devices…
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Entries tagged with: Route 1H
- by Loren Stewart, CFSE
- Thursday, October 03, 2019
- Functional Safety
Back to Basics 15 - Architectural Constraints
- by Loren Stewart, CFSE
- Tuesday, December 10, 2019
- Functional Safety
Back to Basics 18 – Route 1H
Route 1H is one of two Architectural constraints options made available in the standards IEC 61508-2 and IEC 61511. Route 1H . Both Route 1H and Route 2H are limitations that impose the hardware selected to implement a safety-instrumented function, regardless of the performance calculated for a subsystem.
Route 1H is…
- by Loren Stewart, CFSE
- Thursday, January 02, 2020
- Functional Safety
Back to Basics 19 – Route 2H
Route 2H is one of two Architectural constraints options made available in the standards IEC 61508-2 and IEC 61511. Route 1H . Both Route 1H and Route 2H are limitations that impose the hardware selected to implement a safety-instrumented function, regardless of the performance calculated for a subsystem.
What exactly is Route 2H…
- by Loren Stewart, CFSE
- Tuesday, September 01, 2015
- Certification
What is Systematic vs. Random Capability?
There seems to be a bunch of confusion surrounding systematic capability and random capability. I will try to clear up the confusion by explaining what is all considered and what the IEC standard says about both.
Systematic Capability
- Development process/quality system requirements depend on certification SIL level, higher…