2600T Series Pressure transmitters 266 models | SOI/266-XC 21
SAFETY RELATED PARAMETERS
The Safety 266 pressure transmitters product meets the SIL2 requirements of IEC 61508 in low as well as high demand mode of ope-
ration. The total PFD in low demand mode for 10 years proof test interval in the worst case is less than the 15% of the range dened
in IEC 61508-1. The relevant numbers are stated in the table below:
266DX, 266VX,
266PX, 266HX,
266NX
266MXXR,
266CXXR,
266JXXR,
266RXXR
266MXXR,
266CXXR,
266JXXR,
266RXXR
(except range R)
266GXX, 266AXX
(except range C & F)
266GXX, 266AXX
(only range C & F)
λdd
2,62E-07 3,50E-07 3,94E-07 4,05E-07 4,13E-07
λdu
6,82E-08 4,10E-08 6,85E-08 6,85E-08 6,90E-08
λsd
3,37E-07 1,50E-08 2,39E-07 2,40E-07 2,40E-07
λsu
3,01E-07 1,42E-07 3,53E-07 3,42E-07 3,18E-07
HFT
0 0 0 0 0
T1
1 year / 10 years
(8760h / 87600h)
1 year / 10 years
(8760h / 87600h)
1 year / 10 years
(8760h / 87600h)
1 year / 10 years
(8760h / 87600h)
1 year / 10 years
(8760h / 87600h)
SFF
92,95% 93,63% 93,51% 93,51% 93,37%
Total Failure Rate
9,68E-07 1,08E-06 1,06E-06 1,06E-06 1,04E-06
MTBF
118 106 108 108 110
MTTR
8h 8h 8h 8h 8h
DC
D: 79%
C: 53%
D: 86%
C: 41%
D: 85%
C: 40%
D: 86%
C: 41%
D: 86%
C: 43%
PFD (1 year)
2,99E-04 3,01E-04 3,00E-04 3,00E-04 3,02E-04
PFH (1 yer)
6,82E-08 6,87E-08 6,85E-08 6,85E-08 6,90E-08
PFD (10 years)
2,98E-03 3,00E-03 2,99E-03 2,99E-03 3,01E-03
PFH (10 years)
6,82E-08 6,87E-08 6,85E-08 6,85E-08 6,90E-08
Testing time
< 20 s < 20 s < 20 s < 5 s < 70 s
ROM check time
< 30 s < 30 s < 30 s < 30 s < 70 s
© Copyright 2010 by ABB Instrumentation
We reserve the right to technical amendments.
Information in this manual is intended only to assist our customers in the efcient operation of our equipment. Use of this manual for any other purpose is specically prohibited and its contents are not
to be reproduced in full or part without prior approval of Technical Communications Department, ABB.
Document No. SOI/266-XC
Date of issue: March 2010
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