1 failure rates and sff for 701150 (ac 230 v), 6 safety manual – JUMO 701150 14597 safetyM STB/STW - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual User Manual
Page 41
6 Safety Manual
41
6.8
Safety instrumented parameters related to the temperature monitoring unit
The following parameters were calculated by means of an FMEDA component under the following conditions:
-
Error models corresponding to requirements of DIN EN 61508 for conformity with SIL2 or SIL3
-
Failure rate of components according to the RDF 2000 UTE C 80-810 standard and SN 29500
-
Sensors were combined as a subsystem in the following five variants:
6.8.1
Failure rates and SFF for 701150...23 (AC 230 V)
Important information:
Variants 1 to 4 were evaluated with JUMO probes according to data sheets 901006 and 902006.
For variant 5 no sensor system was taken into account.
In this case, the user selects the sensor system.
Variant
λ
s
[Fit]
λ
dd
[Fit]
λ
dd
[Fit]
SFF
PFH (1/h)
PFD
avg
1
865.21
306.24
32.31
96 %
4.56 e
-9
2.02 e
-4
1a
865.21
306.24
32.31
96 %
1.05 e
-9
4.57 e
-5
2
868.17
303.28
32.31
96 %
1.05 e
-9
4.57 e
-5
3
881.62
326.78
33.62
96 %
1.03 e
-9
4.49 e
-5
4
887.68
343.82
35.52
96 %
1.22 e
-9
5.30 e
-5
5
881.02
313.43
35.57
96 %
1.04 e
-9
4.48 e
-5