Achievable pl – JUMO 14597 safetyM STB/STW Ex - Safety Temperature Limiter and Safety Temperature Monitor Data Sheet User Manual
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Data Sheet 701155
2012-10-01/00542385
JUMO GmbH & Co. KG
Delivery address: Mackenrodtstraße 14
36039 Fulda, Germany
Postal address:
36035 Fulda, Germany
Phone:
+49 661 6003-0
Fax:
+49 661 6003-607
E-mail:
Internet:
www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: +44 1279 635533
Fax:
+44 1279 635262
E-mail:
Internet: www.jumo.co.uk
JUMO Process Control, Inc.
6733 Myers Road
East Syracuse, NY 13057, USA
Phone: 315-437-5866
1-800-554-5866
Fax:
315-437-5860
E-mail:
Internet: www.jumousa.com
Failure rates and SFF for 701155...23 (AC 230 V)
Failure rates and SFF for 701155...25 (AC/DC 24 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 included (only the JUMO safetyM STB/STW Ex).
In this case, the user selects the sensor system.
The PFH and PFD
avg
values were calculated with the assumption that the time to restore the system is 8 h (MTTR = 72 h). Furthermore, the calculation was based on
a lifetime of 10 years (T
1
= 10 y). The Common Cause Factor was determined according to the tables of DIN EN 61508 for sensor systems and logic.
Achievable PL
Important information:
Variants 1 to 4 were evaluated with JUMO probes according to data sheets 901006 and 902006. For variation 5 no sensor system was included (only the JUMO safe-
tyM STB/STW). In this case, the user selects the sensor system. For this reason, the user is responsible for evaluating the achievable PL.
Table 1:
Variant
λ
s
[Fit]
λ
dd
[Fit]
λ
dd
[Fit]
SSF
PFH (1/h)
PFD
avg
1
985.14
306.75
32.93
96 %
5.18 e
-9
2.29 e
-4
1a
985.14
306.75
32.93
96 %
1.66 e
-9
7.29 e
-5
2
988.1
303.79
32.93
96 %
1.66 e
-9
7.29 e
-5
3
1001.55
324.85
36.68
96 %
1.71 e
-9
7.46 e
-5
4
1007.61
341.89
38.58
96 %
1.73 e
-9
7.55 e
-5
5
1000.95
318.38
31.75
96 %
1.54 e
-9
6.74 e
-5
Table 2:
Variant
λ
s
[Fit]
λ
dd
[Fit]
λ
dd
[Fit]
SSF
PFH (1/h)
PFD
avg
1
919.23
306.82
34.24
96 %
7.22 e
-9
3.19 e
-4
1a
919.23
306.82
34.24
96 %
3.71 e
-9
1,63 e
-4
2
886.19
303.86
34.24
96 %
3.71 e
-9
1.63 e
-4
3
947.18
325.86
37.89
96 %
3.75 e
-9
1.64 e
-4
4
953.24
350.21
40.59
96 %
3.85 e
-9
1.69 e
-4
5
938.89
323.57
36.89
96 %
3.68 e
-9
1.61 e
-4
Variant
Connected sensors
Sensor sys-
tem architec-
ture
Logic archi-
tecture
Achievable PL
1
1x Pt100 2-wire circuit
1oo1
1oo2D
PLd
1a
2x Pt100/1000 2-wire circuit
1oo2
1oo2D
PLe
2
2x Pt100/1000 3-wire circuit
1oo2
1oo2D
PLe
3
2x thermocouple
1oo2
1oo2D
PLe
4
1x Pt100/1000
2-wire and 3-wire circuit
1x thermocouple
1oo2
1oo2D
PLe
5
STB/STW 701155 without
sensor system 1oo2D archi-
tecture.
No probe or use of the input 4
to 20 mA
(means that the sensor is not
taken into account for the cal-
culation).
Sensors con-
nected by the
system user
architecture
acc. to con-
nection 1oo1
or 1oo2
1oo2D
PL of the used sen-
sor
MTFF
d
= 100 years
Max. achievable PL of
the system with 1oo1
sensor system architec-
ture
DC
701155
≥
90 %
Max. achievable PL of
the system with 1oo2
sensor system architec-
ture
DC
701155
≥
90 %
PLb
PLd
PLe
PLc
PLd
PLe
PLd
PLd
PLe
PLe
PLe
PLe