描述
控制规模主要指控制开关量的入、出点数及控制模拟量的模入、模出，或两者兼而有之（闭路系统）的路数。但主要以开关量计。模拟量的路数可折算成开关量的点，大致一路相当于8～16点。
依这个点数，PLC大致可分为微型机、小型机、中型机及大型机、超大型机。
Lot of 2 HP DL585 2.4GHz Dual Core CPU with CPU Board
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C.itoh H8300-10 C.itoh H8300-10 Cpu Board Ci3500/ci4000
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Ncr 530-0042469 Ncr 530-0042469 Dual Cpu Board 3426 M9b
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HP N4000 1-8WAY PA RISC 8500 CPU BOARD A3639-60006
Rich Vintage Telecom CPU Board for GOLD SCRAP!
