描述
继电器输出、晶体管输出和晶闸管（可控硅）输出。如图1所示。要注意输出负载电源要求。输出主要技术指标见表1。由表1可知，晶闸管输出只可接交流负载，晶体管输出只能接直流负载，继电器输出既可接交流负载也可接直流负载。当负载额定电流、功率等超过接口指标后要用接触器、继电器等过渡，通过它们接大功率电源。
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