Description
采用可编程序的存储器，用以在其内部存储执行逻辑运算、顺序控制、定时/计数和算术运算等操作指令，并通过数字式或模拟式的输入、输出接口，控制各种类型的机械或生产过程。PLC是微机技术与传统的继电接触控制技术相结合的产物
Cisco BC-UAI-8E1-DB15 8 port E1 backcard pn 73-2932-02
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Cisco OC48E/POS-LR-SC 1-Port OC-48/STM16 SONET GSR12000
