PCB Piezotronics IMI Sensors EX640B02 Installation And Operating Manual page 40

O
t"n
Name
Results*
Safe Detected failure rate
2USD
x 10 0.4937
(0.5 117)
Safe Undetected failure rate
2su x 10
0.3291
(0.3411)
Dangerous Detected failure rate
2DD
x 10-6
1.2813
(1.2993)
Dangerous Undetected failure rate
7DU X
10-6
0.3348
(0.3468)
Average frequency of a dangerous
-6
failure on demand
PFHx 10
1255.0477
(1299.0000)
Type B components: 64XVZZ Series (includes EX64XVZZ 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 5FF 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.
Senior Consultant,
4
0' 747;r
Ashton Hainge, lntertek
CFSP, PMP
*N ote: Values are for Circular/Cylindrical connectors. Values for Terminal Block connectors are given in parenthesis.
1
The assessment results described in this report only refer to the safety-related parameters PFD avg, HFT, and SFF
according to JEC 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.
PCB SIL Sensor Rating
Report
No:
103685042CSL1-001
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