SIF Builder
Safety function verification for IEC 61508/61511. Combine manufacturer FMEDA data into safety loops and calculate PFDavg/PFH to verify SIL targets.
This tool calculates hardware PFDavg/PFH only and is for educational purposes. A complete SIL verification also requires software systematic capability assessment (IEC 61508-3), management of functional safety (IEC 61508-1), competency assessment, and detailed proof test procedures. Do not use results for actual SIL verification without independent review by a certified functional safety engineer (TUV CFSE, IEC 61508/61511).
SIF Builder
SIL2
Safety instrumented function loop diagram showing three subsystems: Sensor on the left, Logic Solver in the center, and Final Element on the right, connected by signal flow paths. Click any subsystem to configure it.