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800H-2HA4RLW
93-32-5559A
GJR5251300R0171-07KT93F
MDI1PRD23B7-EQ-N
JAMSC-120DD034340
2711P-RP1SER/G
2711P-K6C20D8
1FK7063-5AF71-1SA0
3AUA0000036521

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描述

PLC的输入输出信号可以是开关量、数字量或模拟量,其中最普遍应用的是开关量。PLC开关量输入设备有两种形式:一种是无源开关,如各种按钮、继电器触点、控制开关等;一种是有源开关,如各种接近开关、传感器、编码器、光电开关等。PLC开关量输出通常用三种形式:继电器输出、晶体管输出和双向晶闸管输出;由于PLC每个输出点的负载能力较小,因此一般能直接驱动很小功率的执行机构,或驱动控制执行机构的接触器线圈或指示灯。

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