描述
这个肯定是每个柜子都必不可少的东西根据信号数量可以配置。如果只是一个单纯的PLC控制柜基本就是需要这些玩意，如果你的控制柜内还需要有其他的东西就看情况增加。比方说你有可能要对某些现场的仪表或者小控制箱供电，可能你就得要增加空开数量。或者你要PLC接至上位机，可能就需要增加交换机什么的。
PARKER PNEUMATICS PRESSURE OIL AIR HYDRAULIC CYLINDER
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International NEW Parker Pressure Switch 379502 FR SHIP
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