中间层由带以太网接口的现场控制单元设备PLC组成；
The middle layer is composed of the field control unit device PLC with Ethernet interfaces.
通过与不同的接口电路板的连接，可构成多种应用系统，也可构成其它专业课程的智能控制单元。
By means of it, some teaching experiments for hardwares such as monolithic processor systems and peripheral interface devices, and software programming experiments can be conveniently carried out.
我们的产品作为现场总线应用和电源的接口，在工业控制单元内部得到广泛应用。
Our products are utilized inside industrial control units, as interfaces for field bus applications and for power supplies.
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