1756-A10K 用心服务,信誉为本 17750668118
1756-A10K 用心服务,信誉为本 17750668118
软元件是PLC内部的具有一定功能的器件,实际上是由电子电路和寄存器及存储器单元等组成。它们都具有继电器特性,但没有机械性的触点。为了把这种元器件与传统电气控制电路中的继电器区别开来,把它们称做软继电器。
其主要特点是:
(1)软元件是看不见、摸不着的,也存在物理性的触点;
(2)每个软元件可提供无限多个常开触点和常闭触点,即它们的触点可以无限次使用;
(3)体积小、功耗低、寿命长。
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