4 Specifications
Kontron User's Guide EPIC/CE
18
4.4
MTBF
The following MTBF (Mean Time Between Failure) values were calculated using a combination of
manufacturer’s test data (if the data was available) and a Bellcore calculation for the remaining parts.
The Bellcore calculation involved the “Method 1 Case 1” method. In that particular method, the
components were assumed to be operating at a 50% stress level in a 40° C ambient environment, and
the system was assumed to have not been burned in. Manufacturer’s data was used wherever possible.
The manufacturer’s data, when used, was specified at 50° C, which means that the following results were
slightly conservative. The MTBF values shown below were for a 40° C office or telecommunications
environment. Higher temperatures and other environmental stresses (extreme altitude, vibration, and
salt water exposure) will lower the MTBF values.
®
System MTBF (hours) :
To Be Done
Notes:
Fans shipped with Kontron Embedded Modules GmbH products have an operating life of up to 50,000 hours.
The estimates above assumed that a passive heat-sinking arrangement was used instead of a fan.
Estimated RTC battery life (as opposed to battery failures) was not accounted for in the above figures and
needs separate consideration. Battery life depends on temperature and operating conditions. When the
Kontron unit has external power, battery drain comes from leakage paths.
Summary of Contents for EPIC/CE
Page 1: ...Kontron User s Guide EPIC CE Document Revision 1 14...
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Page 88: ...25 Appendix C Block Diagram Kontron User s Guide EPIC CE 88 25 Appendix C Block Diagram...
Page 93: ...27 Appendix E Connector Layout Kontron User s Guide EPIC CE 93 27 2 Bottom Side...
