《140DDI84100》

140DDI84100

140DDI84100 产品特点：

＠ ABB机器人备件，DCP10……

＠ AB：Reliance，SLC500/1747/1746，Micrologix/1761/1763/1762/1766/1764 PLC- 5/1771/1785 ....PLC模块

＠ Schneider Modicon（施耐德莫迪康）140CPU ……

＠ GE通用电气，IC697……

＠ Siemens(西门子)：西门子数控，西门子摩尔，6ES5948-3UR23  ……

＠ TRICONEX―西屋....

 

【厦门光沃自动化设备有限公司】

【联 系 人：陈小姐】

【免费热线：0592-5709825】

【24小时开机：18030229053 】    

【工作QQ: 2479261344】

 

数值信号的输入
    输入信号防干扰的接法 

    变频器中也存在一些数值型（如频率、电压等）指令信号的输入，可分为数字输入和模拟输入两种。数字输入多采用变频器面板上的键盘操作和串行接口来给定；模拟输入则通过接线端子由外部给定，通常通过0～10V/5V的电压信号或0/4～20ｍＡ的电流信号输入。由于接口电路因输入信号而异，因此必须根据变频器的输入阻抗选择PLC的输出模块。图5为PLC与变频器之间的信号连接图。 

    当变频器和PLC的电压信号范围不同时，如变频器的输入信号为0～10V，而PLC的输出电压信号范围为0～5V时；或PLC的一侧的输出信号电压范围为0～10V而变频器的输入电压信号范围为0～5V时，由于变频器和晶体管的允许电压、电流等因素的限制，需用串联的方式接入限流电阻及分压方式，以保证进行开闭时不超过PLC和变频器相应的容量。此外，在连线时还应注意将布线分开，保证主电路一侧的噪音不传到控制电路。 

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