JUMO 701150 14597 safetyM STB/STW - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 41)

6 Safety Manual 41 2014-05-01
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