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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