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MVME162-522A
摩托羅拉MVME162嵌入式控制器的指定、設計和
經測試，可在0°至0°的進氣溫度范圍內可靠運行
55°C（32°至131°F），強制空氣冷卻速度通常可以達到
使用100 CFM軸流風機。溫度鑒定在
標準摩托羅拉VMEsystem 3000機箱。二十五瓦負載板
插入兩個卡槽中，每側一個，與下面的板相鄰
測試，以模擬高功率密度系統(tǒng)配置。一組
三臺軸流風機，每個風機的額定值為100 CFM，直接放置在VME下方
卡片固定框架。在風扇之間測量進氣溫度
組件和卡盒，其中進入的氣流首先遇到
正在測試的控制器。當控制器受到
環(huán)境溫度變化。臨界高功率外殼溫度
對密度集成電路進行監(jiān)控，以確保組件供應商
未超出規(guī)格。
而冷卻所需的確切風量取決于
環(huán)境空氣溫度和電路板的類型、數量和位置，以及
對于其他熱源，通?？梢杂?0 CFM實現充分冷卻
490 LFM流經控制器。需要較少的氣流來冷卻
控制器在具有較低大環(huán)境的環(huán)境中。在“更多”下
良好的熱條件，可以操作控制器
在高于55°C且氣流增加的情況下可靠運行。需要注意的是
除了空氣移動器的額定CFM外，還有幾個因素
確定流經控制器的空氣的實際體積和速度。

The Motorola MVME162 Embedded Controller is specified, designed, and
tested to operate reliably with an incoming air temperature range from 0° to
55° C (32° to 131° F) with forced air cooling at a velocity typically achievable
by using a 100 CFM axial fan. Temperature qualification is performed in a
standard Motorola VMEsystem 3000 chassis. Twenty-five watt load boards
are inserted in two card slots, one on each side, adjacent to the board under
test, to simulate a high power density system configuration. An assembly of
three axial fans, rated at 100 CFM per fan, is placed directly under the VME
card cage. The incoming air temperature is measured between the fan
assembly and the card cage, where the incoming airstream first encounters the
controller under test. Test software is executed as the controller is subjected to
ambient temperature variations. Case temperatures of critical, high power
density integrated circuits are monitored to ensure component vendors
specifications are not exceeded.
While the exact amount of airflow required for cooling depends on the
ambient air temperature and the type, number, and location of boards and
other heat sources, adequate cooling can usually be achieved with 10 CFM
and 490 LFM flowing over the controller. Less airflow is required to cool the
controller in environments having lower maximum ambients. Under more
favorable thermal conditions, it may be possible to operate the controller
reliably at higher than 55° C with increased airflow. It is important to note that
there are several factors, in addition to the rated CFM of the air mover, which
determine the actual volume and speed of air flowing over the controller.