Ask a few conceptual questions about grounding
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What is working ground, what is signal circuit ground, and what is shielding ground? What’s the difference?
1. Working grounding is a type of grounding designed to ensure the reliable operation of the system and the instruments connected to it, as well as to maintain accuracy in measurements and control. It is divided into machine logic grounding, signal circuit grounding, and shielding grounding; in petrochemical and other explosion-proof systems, there is also intrinsically safe grounding. 2. Grounding of the signal circuits, such as grounding the negative terminals of various transmitters, and grounding the negative terminals of digital signals. Shield grounding (the grounding of the shield layer of the signal).