Emerson EL-O-Matic F Series - Section 10: Common Cause Factors

17
September 2018
SIL Safety Manual
DOC.SILM.EF.EN Rev. 1
Common Cause Factors
Section 10: Common Cause Factors
The product has a single channel conguration, HFT=0.
The β factors can be used when performing PFD
AVG
calculations for redundant
architectures.
The Common Cause factors, relevant when the product is used in redundant conguration,
are: β=β
D
=0,05
NOTE:
• The above value is the value for 1oo2 architecture. The values for other architectures
shall be calculated according to IEC 61508 Part 6, Table D.5.
• The above value is calculated in the hypothesis of redundancy without diversity.
Section 10: Common Cause Factors