1784-KT/B通信卡
1784-KT/B通信卡
1784-KT/B通信卡
模拟量信号连接应注意的问题变频器中的模拟量输入信号，通常指0～10V/5V 的电压信号或0/4～20 ｍＡ的电流信号；这些模拟量输入信号可通过接线端子由外部给定，当变频器与P L C 连接时，这些模拟量输入信号也可来自PLC 的模拟量输出信号，如图3 所示。在进行模拟量的连接时应注意：
（1）阻抗匹配。根据变频器的输入阻抗选择P L C 的输出模块，实现两者的阻抗匹配。
（2）电压范围。当变频器和P L C 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），需采用串联电阻的方式进行分压，以保证两者在正常电压范围内
工作，避免电压过限可能损坏器件。
（3）采用屏蔽电缆或绞合电缆。对于变频器和P L C 而言，弱电控制信号（电压0～5V/10V、电流0/4～20ｍＡ等）易受到外界强信号的干扰，对控制信号采取适当的屏蔽措施。常用的方式就是采用屏蔽电缆进行屏蔽；对于长距离的控制回路宜采用绞合电缆，绞合电缆的绞合间距尽可能小。
（4）主、控电缆分开布线。实际连线时，注意主、控电缆分开布线，且相隔的距离。以保证主电路侧的干扰及噪音影响不到控制电路。
ACS880-304-0650A-3+A018+C188 1
TWDAMI8HT 1
C98043-A7002-L4-12 1个
6AG1322-1BH01-2AA0 5
BU220-4C FUJI 2个
TI0000A00V 2
RESM20USA100 2
A-5616-0352 2
A-5000-7547 10
A-5000-3709 10
A-5000-7755 5
A-2063-8020 2
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134-4MB02-0AB0 4
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PERCEPTRON 9110014 9110014
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MEASUREX 51402797-100 51402797100
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