Beckhoff EL72 1-901 Series - Page 183

Integrated safety
EL72x1-901x 183Version: 1.9
Calculation for block 1
Calculation of the PFH and MTTF
d
values from the B10
d
values:
From:
and:
Inserting the values, this produces:
S1:
S2:
and the assumption that S1 and S2 are each single-channel:
produces for
S1:
S2: