描述
输出模块分为晶体管、双向可控硅、接点型。晶体管型的开关速度最快(一般0.2ms),但负载能力最小,约0.2~0.3A、24VDC,适用于快速开关、信号联系的设备,一般与变频、直流装置等信号连接,应注意晶体管漏电流对负载的影响。
可控硅型优点是无触点、具有交流负载特性,负载能力不大。继电器输出具有交直流负载特点,负载能力大。常规控制中一般首先选用继电器触点型输出,缺点是开关速度慢,一般在10ms左右,不适于高频开关应用。
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