Frequency converter-DCS
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The original inverter controlled the output signal 1-10V, the DCS required 5V, 4-20ma, and a 2 ohm resistor in series. Sometimes it was often burned. Experts, can you use other methods to solve the problem?
What system do you use? The input signal should be selected in the DCS configuration. This was how we used to do it. Some inverters are 4-20mA and some are 0-10V. Just select the input signal range directly in the configuration! Or you can add a signal isolator, the input type can be selected: DC current: 0～10mA, 4～20mA, 0～20mA DC voltage: 0～5V, 1～5V, 0～10V This post was last edited by zlky2005 on 2007-12-11 17:45 ]
From the same point of view, general systems can be selected, such as: 4 to 20mA or 1-5V, if not, just add an isolator, it should solve the problem.
You can use the transmitter to convert the voltage signal of the frequency converter into a 4-20MA current signal, which is more convenient. :)
Is the resistor you put in series too small? The 2 ohm resistor should be wrong. If you put a 2 ohm resistor in series, the output should not be able to get 5V voltage.
In order to facilitate the unified signal input of the DCS system, the inverter control output signal 0-10V can also be converted into a 4~20mA signal through the signal conversion (isolation) module.
The original poster is a fiery person, so I wrote 2K euros as 2 euros. Please forgive me!
6. What the poster said is very correct. Please give me some advice. Thank you! ........
If it is 2kΩ, it is correct. You can consider changing the power of the resistor to a larger one.
It is best to use a signal transmitter with an input of 1-10v and an output of 4-20ma to ensure the accuracy of the measurement.
Just replace it with a power converter. There are various specifications available.
This method of series resistors is not feasible! The output signal type of the frequency converter can be selected through configuration, and the same is true for DCS. As long as the two are set to the same, it is enough. Usually 4-20mA has various advantages! If you cannot configure the selection, you can only use a signal converter!