Endress+Hauser fieldgate FXA 520 Notice D'installation Et De Montage page 24

Technical Data
Operating conditions
Electromagnetic
compatibility (EMC)
Application in protection functions
The FXA 520 can be attached back effect freely to protection functions that are classified in SIL 2 to IEC 61508.
1
SFF
1) SFF = Safe Failure Fraction
1
TI
1 year
5 years
10 years
1) Test Interval between life testing of the protection function (in years)
2) PFD = Probability (average) of a dangerous Failure on Demand
avg
24
Interference Emission to EN 61326, Electrical Equipment Class B
Interference Immunity to EN 61326
60%
2
PFD
avg
-6
1,23 x 10
-6
6,13 x 10
-5
1,23 x 10
Endress+Hauser