JUMO dTRANS T06 Ex, Руководство по эксплуатации

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6 Safety manual 47
The following table shows the achievable PL level:
6.7.2 Calculations of the DIN EN ISO 13849-1 performance level – 707075/X - 29/XXX (DC 24 V)
Type 707075 meets the architecture requirements for a category 2 system.
The necessary limit values according to DIN EN ISO 13849-1, table K.1 for performance level c, and the fundamental and es-
tablished safety principles are adhered to for all voltage versions of type 707075 considered.
If the temperature transmitter is used redundantly (i.e. HFT = 1), the requirements for a category 3 system are adhered to. The
necessary limit values according to DIN EN ISO 13849-1, table K.1 for performance level d are met here.
The following table can be used to determine the quantitative PL provided that the MTTF
d
value for the sensor is 100 years.
The DC achieved by the temperature transmitter to detect sensor errors is assumed to be
≥
60 % for redundant use (HFT = 1).
PL
f
Required Performance Level 3.1.24
T
M
Mission Time (functional life, designated period of utilization) 3.1.28
T
10d
value Reference value for a preventative replacement (10 % of the B10d value). At this
value, a dangerous failure has already occurred for approx. 63 % of all compo-
nents.
In this case, the standard DIN EN ISO 13849-1 recommends replacement.
Variant
MTTF
d
DC
avg
CCF PL
4 to 20 mA (without sensor technology 1oo1D ar-
chitecture) 47 years 93.52 % 75 points PL c
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