Kontron COMe-bCD2 - Manual (Page 18)

3 Specifications
Kontron User's Guide ETXexpress® CD 18
3.4 Environmental Specifications
3.4.1 Temperature
Operating: (with Kontron Embedded Modules heat-spreader plate assembly):
Ambient temperature: 0°C to 60°C
Maximum heatspreader-plate temperature: 0°C to 60°C
Non-operating: -30°C to 85°C
Note: The maximum operating temperature with the heatspreader plate is the maximum measurable temperature
on any spot on the heatspreader’s surface. You must maintain the temperature according to the above
specification.
Operating (without Kontron Embedded Modules heat-spreader plate assembly):
Maximum operating temperature: 0°C to 60°C
Non operating: -30 to +85 °C
Note: The maximum operating temperature is the maximum measurable temperature on any spot on a module’s
surface. You must maintain the temperature according to the above specification.
3.4.2 Humidity
Operating: 10% to 90% (non condensing)
Non operating: 5% to 95% (non condensing)
3.5 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 used is “Method 1 Case 1”. In that particular method the 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. Manufacturer‟s data has been used wherever possible. The
manufacturer‟s data, when used, is specified at 50° C, so in that sense the following results are slightly
conservative. The MTBF values shown below are for a 40° C in an office or telecommunications
environment. Higher temperatures and other environmental stresses (extreme altitude, vibration, salt
water exposure, etc.) lower MTBF values.
System MTBF (hours) for single channel memory version: 152941
System MTBF (hours) for dual channel memory version: 191206
Notes: Fans usually shipped with Kontron Embedded Modules GmbH products have 50,000-hour typical operating
life. The above estimates assume no fan, but a passive heat sinking arrangement.
Estimated RTC battery life (as opposed to battery failures) is not accounted for in the above figures and need
to be considered for separately. Battery life depends on both temperature and operating conditions. When
the Kontron unit has external power; the only battery drain is from leakage paths.