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Consider:
Grounding schemes are selected according to overall instrument design requirements, not particularly LAN interface circuit. Non-isolated interfaces (e.g. USB) and power supply are more critical in this regard.

Yes. A parallel resistor (Megohm range) is typically required to prevent charging up to high DC voltage by electrostatics.

Many effects, depending on instrument function.

[QUOTE="FvM, post: 1790402, member: 152255"] Consider: Grounding schemes are selected according to overall instrument design requirements, not particularly LAN interface circuit. Non-isolated interfaces (e.g. USB) and power supply are more critical in this regard. Yes. A parallel resistor (Megohm range) is typically required to prevent charging up to high DC voltage by electrostatics. Many effects, depending on instrument function. [/QUOTE]

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