Tricon机架可以用架装形式或盘装而装在工业标准的NEMA机壳内。主机架或扩展机架的具体尺寸为48.3cm×57.8cm×45.1cm（19英寸×22.75英寸×17.75英寸）（宽×高×深）。

图2-1和2-2示出标准的主机架和扩展机架。主机架可以支持下列模件：
—两个电源模件
—三个主处理器
—通讯模件，例如ICM、NCM、ACM或者SMM
—I/O模件，带热备
—通讯模件（仅限于#2扩展机架）

每个机架具有不同的总线地址（1到15）；机架内的每个模件具有地址，由位置或槽位决定它的具体地址（见附录B）。主机架上有一个四位置的键开关，用以控制整个的Tricon系统。开关的设定为RUN（运行）、PROGRAM（编程）、STOP（停止）和REMOTE（远程）。进一步的资料参阅第4章，“安装与检验”。
 

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