KROHNE OPTISWITCH 5xx0C NAMUR SIL EN - Manual (Page 10)

1 5 10
T
Proof
PFD
avg
1
2
3
4
Fig. 1: Chronological sequence of PFD
avg
(figures see above charts)
1 PFD
avg = 0
2 PFD
avg
after 1 year
3 PFD
avg
after 5 years
4 PFD
avg
after 10 years
Multiple channel architecture
If the measuring system is used in a multiple channel architecture, the
safety-relevant characteristics of the selected structure of the meas.
chain must be calculated specifically for the selected application
according to the above failure rates.
A suitable Common Cause Factor must be taken into account.
Specific characteristics
10 OPTISWITCH series 5000 • - NAMUR
1 Functional safety
32747
-EN
-100128