2
02
1-
09
16
Functional Safety K-LB-*.*, F*-LB-I, P-LB-*.*.*
Planning
Plug-In Modules
P-LB-1.D.*, P-LB-1.F.* (1oo1 structure)
Parameters Characteristics
Assessment
type and
documenta-
tion
FMEDA report
Device type
A
Mode of
operation
Low demand mode or high demand mode
Safety
function
1
1
The safe state of the surge protection barrier depend on the application.
Pass through the signal
HFT
0
SIL
2
2
The maximum safety integrity level of the safety loop in which the device might be used depends on the characteristics
of the whole saftey loop and the connected field devices in the application.
2 or 3
Signal type
1
4-wire
resistance
thermometer
(RTD)
3-wire
resistance
thermometer
(RTD)
Voltage
source
2-wire
resistance
thermometer
(RTD)
Potentiometer Thermo-
couple (TC)
Safe state
1
Threshold
Threshold
Threshold
Threshold
Threshold
Threshold
Safety loop
fault detection
3
3
This fault detection has to be provided by the safety loop architecture
(e. g. NAMUR signal
–
lead breakage and short circuit detection, current loop > 20 mA).
< 3.6 mA and
> 21 mA can
be detected
< 3.6 mA and
> 21 mA can
be detected
< 3.6 mA and
> 21 mA can
be detected
< 3.6 mA and
> 21 mA can
be detected
< 3.6 mA and
> 21 mA can
be detected
< 3.6 mA and
> 21 mA can
be detected
sd
+
su
0 FIT
0 FIT
0 FIT
0 FIT
0 FIT
0 FIT
dd
43 FIT
23.1 FIT
27 FIT
16 FIT
12.1 FIT
8.1 FIT
du
16 FIT
12 FIT
8.1 FIT
0.02 FIT
22.9 FIT
8 FIT
no effect
143 FIT
101 FIT
101 FIT
41.1 FIT
101 FIT
41.1 FIT
not part
0 FIT
66 FIT
66.1 FIT
145 FIT
66.1 FIT
145 FIT
total (safety
function)
59 FIT
35.1 FIT
35.1 FIT
16.02 FIT
34 FIT
16.1 FIT
MTBF
4
4
acc. to SN29500. This characteristic includes failures which are not part of the safety function/MTTR = 8 h.
564 years (all components of the device)
PFH
1.79 x 10
-8
1/h 1.79 x 10
-8
1/h 1.79 x 10
-8
1/h 1.79 x 10
-8
1/h 1.79 x 10
-8
1/h 1.79 x 10
-8
1/h
PFD
avg
for
T
1
= 1 year
7.84 x 10
-5
7.84 x 10
-5
7.84 x 10
-5
7.84 x 10
-5
7.84 x 10
-5
7.84 x 10
-5
Table 3.5
