Deltabar S
Endress+Hauser 5
Parameter profile B with message E727 (pressure overrange) configured as a warning
Useful lifetime of electric
components
The established failure rates of electrical components apply within the useful lifetime as per
IEC 61508-2: 2010 section 7.4.9.5 note 3. According to DIN EN 61508-2:2011 section 7.4.9.5
national footnote N3 appropriate measures taken by the manufacturer and operator can extend the
useful lifetime.
Parameters according to IEC 61508 Value
Safety functions MIN, MAX, Range
SIL (hardware) • 2 (single-channel),
• 3 (with use of a SIL 3 capable coincidence logic)
SIL (software) 3
Device type B
Operating mode Low demand mode
Safety functions MIN MAX Range
sd
50 FIT 347 FIT 397 FIT
su
427 FIT 427 FIT 427 FIT
dd
347 FIT 50 FIT 0 FIT
du
76 FIT 76 FIT 76 FIT
tot
1)
1) According to Siemens SN29500. This value takes into account all failure types.
1136 FIT
MTBF
tot
)
101 years
SFF 91%
PFD
avg
for T
1
= 1 year (single-channel)
2)
2) If the average temperature during continuous operation is in the region of +50 °C (+122 °F), a factor of 1.3
should be taken into account.
3.32 × 10
-04
Diagnostic test interval
3)
3) During this time, all diagnostic functions are executed at least once.
5 min (RAM, ROM, ...), 1 s (Measurement)
Fault reaction time
4)
4) Time between fault detection and fault reaction.
5 min (RAM, ROM, …), 10 s (Measurement)
Settling time
5)
5) Step response time as per DIN EN 61298-2.
Technical Information TI00382P/00/EN,
"Dead time, time constant (T
)" section
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