PCB Piezotronics IMI SENSORS Spindler 607A60 Installation And Operating Manual page 24

O
n
Name
Result
Safe Detected failure rate
2usD x i0'
0.019
Safe Undetected failure rate
ksu x 10 6
0.013
Dangerous Detected failure rate
2DD
x 10
0.033
Dangerous Undetected failure rate
XDU
x I
6
0.017
Average frequency of a dangerous
PFH
>
0.796
failure on demand
Type B
components:
60X Series
The safety relevant parameter PFDavg is in compliance with the corresponding requirements for SIL 2
according to IEC 615081. The safety relevant parameters HFT and SFF are in compliance with the
corresponding requirements for SIL 1 according to IEC 61508. The user should consider, that the
hardware fault tolerance of all inspected devices is zero and that a single fault can lead to a
dangerous failure. Even though PFDavg has the range of SIL 4, the hardware fault tolerance limits
the capability to SIL 2.
Senior Consultant,
Ashton Hainge, lntertek
CFSP, PMP
The assessment results described in this report only refer to the safety-related parameters PFD avg, HFT, and SFF
according to IEC 61508.
This report does not make any statements, that the manufacturer meets all other requirements of the above cited
standards for hardware, software, documentation, management of functional safety, verification, and validation.
This report does not imply that the examined pressure sensors have been certified for functional safety by the assessor
according to IEC 61508 or any other standards.
The sensors are only one part of a complete safety function. It is at the responsibility of the end-user to prepare and to
apply an extensive reliability model, that brings out the complete safety function and that meets all requirements of
the claimed SIL level according to IEC 61508.
60X PCB SIL Sensor Rating
Report No: 103685042CSLT-003
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