3-Wire Transmitter Connection to PLC
🎥 By watching this video, you’ll get the answer to these questions:
How does a 3-wire current loop work?
How to connect a 3-wire transmitter to a PLC?
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💬 Video Summary:
In a 3-wire current loop, we have a power supply, a 4-20mA level transmitter, and a receiving device such as a PLC analog input module.
From the positive side of the power supply, we bring 24 volts to power up the transmitter.
Then the transmitter generates its desired signal current, which is the 4-20 milliamp signal going to the analog input of the PLC.
And as the common side of the transmitter and the common side of the PLC analog input are the same connection, the return path of the 4-20 milliamp signal is as shown in the video.
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