turck IM35-11Ex-Hi/24VDC Bedienungsanleitung Seite 19

Management summary .................................................................................................... 2
1 Purpose and Scope ................................................................................................... 6
2 Project management .................................................................................................. 7
2.1 exida.com .......................................................................................................... 7
2.2 Roles of the parties involved .............................................................................. 7
2.3 Standards / Literature used ................................................................................ 7
2.4 Reference documents ........................................................................................ 8
2.4.1 Documentation provided by the customer ................................................ 8
2.4.2 Documentation generated by exida.com .................................................. 8
3 Description of the analyzed module ........................................................................... 9
3.1 Isolating Transducers IM33-22Ex-Hi/24VDC ...................................................... 9
3.2 Analog Signal Transmitter IM35-22Ex-Hi/24VDC ............................................. 10
4 Failure Modes, Effects, and Diagnostic Analysis ..................................................... 11
4.1 Description of the failure categories ................................................................. 11
4.2 Methodology – FMEDA, Failure rates .............................................................. 12
4.2.1 FMEDA ................................................................................................... 12
4.2.2 Failure rates ............................................................................................ 12
4.2.3 Assumptions ........................................................................................... 12
4.2.4 Example explaining the behavior of the safety logic solver .................... 13
5 Results of the assessment ....................................................................................... 14
5.1 Isolating Transducers IM33-**(Ex)-Hi/24VDC ................................................... 15
5.2 Analog Signal Transmitters IM35-**Ex-Hi/24VDC ............................................ 17
6 Terms and Definitions .............................................................................................. 19
7 Status of the document ............................................................................................ 20
7.1 Liability ............................................................................................................. 20
7.2 Releases .......................................................................................................... 20
7.3 Release Signatures .......................................................................................... 20
Appendix 1: Possibilities to reveal dangerous undetected faults during the proof test .. 21
Appendix 1.1: Possible proof tests to detect dangerous undetected faults............. 23
Appendix 2: Impact of lifetime of critical components on the failure rate ....................... 25
exida.com
© GmbH
Stephan Aschenbrenner
more@turck.com • www.turck.com • 2015/04
Anhang – EXIDA-Report FMEDA Turck 04/07-14 R001
Table of Contents
TURCK 04-07-14 R001 V2R0.doc; February 8, 2013
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