260-261 / 975
EN 50128
•
Grew up alongside IEC 61508 part 3
•
Notable differences:
Ø
Only 2 SILs (SIL4 ≡ SIL3, SIL2 ≡ SIL1)
Ø
Different recommendations for SIL techniques
Younger half-sister
of 61508 part 3.
Distinct family likeness