1756-IT6I

 1756-it6i

1756-it6i

i／o端的接线

　　输入接线：输入接线一般不要太长。但如果环境干扰较小，电压降不大时，输入接线可适当长些；输入／输出线不能用同一根电缆，输入／输出线要分开；尽可能采用常开触点形式连接到输入端，使编制的梯形图与继电器原理图一致，便于阅读。

　　输出连接：输出端接线分为独立输出和公共输出。在不同组中，可采用不同类型和电压等级的输出电压，但在同一组中的输出只能用同一类型、同一电压等级的电源。由于plc的输出元件被封装在印制电路板上，并且连接至端子板，若将连接输出元件的负载短路，将烧毁印制电路板。采用继电器输出时，所承受的电感性负载的大小，会影响到继电器的使用寿命，因此，使用电感性负载时应合理选择，或加隔离继电器。plc的输出负载可能产生干扰，因此要采取措施加以控制，如直流输出的续流管保护，交流输出的阻容吸收电路，晶体管及双向晶闸管输出的旁路电阻保护。

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厦门泰尼电气有限公司

联系人：刘小姐         q q ：1511256596

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邮

网址：www.xmtaini.com

地址；厦门海沧区滨湖一里7号2008室之一

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