MVME162PA-244L
摩托罗拉MVME162嵌入式控制器的指定、设计和
经测试，可在0°至0°的进气温度范围内可靠运行
55°C（32°至131°F），强制空气冷却速度通常可以达到
使用100 CFM轴流风机。温度鉴定在
标准摩托罗拉VMEsystem 3000机箱。二十五瓦负载板
插入两个卡槽中，每侧一个，与下面的板相邻
测试，以模拟高功率密度系统配置。一组
三台轴流风机，每个风机的额定值为100 CFM，直接放置在VME下方
卡片固定框架。在风扇之间测量进气温度
组件和卡盒，其中进入的气流首先遇到
正在测试的控制器。当控制器受到
环境温度变化。临界高功率外壳温度
对密度集成电路进行监控，以确保组件供应商
未超出规格。
而冷却所需的确切风量取决于
环境空气温度和电路板的类型、数量和位置，以及
对于其他热源，通常可以用10 CFM实现充分冷却
490 LFM流经控制器。需要较少的气流来冷却
控制器在具有较低大环境的环境中。在“更多”下
良好的热条件，可以操作控制器
在高于55°C且气流增加的情况下可靠运行。需要注意的是
除了空气移动器的额定CFM外，还有几个因素
确定流经控制器的空气的实际体积和速度。

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.