PLC structure types and characteristics

Unit unit is characterized by compact structure. It will all circuit loading a module, constitute a whole, such a small size, low cost, convenient installation. FX2 series PLC controller the extension module unit, the basic unit, extension and special adapters and so on four kind of product. Only use basic unit or the above combined using a variety of products. The basic unit ( 米) : inside the CPU and memory, as will use device. Extension units ( E ） : to increase the I/O points used in the device. Can use extension module, with 8 per unit increase input/output points. Also can only increase the input points or only increase output points, therefore make the points of the input/output ratio change. Modular programmable controller module type with the method of piling up his building blocks of the system, on a substrate with CPU, power supply, I/O module and special function module, constitute a total I/O points, many large-scale integrated control system. This kind of structure is the feature of the CPU for independent module, input, output, and independent modules. Mounted the stack structure is also various unit, CPU module, independent of its own but without base plate installation, only with a cable connection between the units, and each cell layers can be piled up. Series FX2 PLC controller is the combination of unit and module type fold mounted structure.
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