Why 4-20ma signal required twisted pair cable?

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1051301

2026-08-06 06:55

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The 4-20 mA signal is commonly used in industrial applications for transmitting analog signals over long distances. Twisted pair cables are preferred because they reduce electromagnetic interference (EMI) and crosstalk from external sources, ensuring signal integrity. The twisted configuration helps maintain a consistent impedance and minimizes noise, which is crucial for accurate readings in sensitive measurement and control systems. Additionally, the low current signal allows for effective transmission over longer distances without significant voltage drop.

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