User`s guide
T-MOPSlcdSA User's Guide
Specifications 11
11
4.4 MTBF
The following Mean Time Between Failure (MTBF) values were calculated using a combination of
manufacturer’s test data and a Bellcore calculation for the remaining parts. The Bellcore
calculation used is “Method 1 Case 1.” In that particular method, components are assumed to be
operating at a 50 % stress level in a 40° C ambient environment, and the system is assumed to
have not been burned in. The manufacturer’s data, when used, is specified at 50° C, which means
that the following results are slightly conservative. The MTBF values shown below are for a 40° C
office or telecommunications environment. Higher temperatures and other environmental stresses
such as extreme altitude, vibration, or salt-water exposure can lower MTBF values.
System MTBF (hours): 371990
Notes:
Fans shipped with Kontron Embedded Modules GmbH products have a typical operating life of 50,000
hours. The system MTBF above assumes no fan, but a passive heat-sink arrangement.
Estimated RTC battery life (as opposed to battery failures) is not accounted for in the above figures and
needs to be considered separately. Battery life depends on temperature and operating conditions. When
the Kontron unit has external power, the only battery drain is from leakage paths.
4.5 Environmental Specifications
4.5.1 Temperature
Operating: -40 to +85°C (*) (with appropriate airflow.)
Non-operating: -40 to +85C (non-condensing)
Notes:
(*) The maximum operating temperature is the maximum measurable temperature on any spot on
the module’s surface. You must maintain the temperature according to the above specification.
4.5.2 Humidity
Operating: 10% to 90% (non-condensing)
Non-operating: 5% to 95% (non-condensing)