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In addition to the role of limiting voltage and current, the isolated safety gate also has the function of current isolation.
The isolation gate is usually composed of circuit limiting unit, current isolating unit and signal processing unit. The circuit limiting unit is the core part of the safety gate.
In addition, there are auxiliary loop supply circuits for driving field instruments and detection circuits for instrument signal acquisition. The signal processing unit performs signal processing according to the functional requirements of the safety gate.
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