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6.4.3 Grounding
Observe the following:
• Provide independent grounding when possible. Ground the FG and LG terminals to the protective ground
conductor. (Grounding resistance: 100 or less)
• If independent grounding is not possible, employ shared grounding, making all of the ground wires to the
same length.
• Use the thickest possible ground wires (up to 2mm
2
). Also, bring the grounding point close to the Ethernet
adapter module as much as possible so that the ground wire can be shortened.
(3) Common grounding Not allowed
Grounding
Ethernet
adapter module
Ethernet
adapter module
Ethernet
adapter module
Another
device
Another
device
Another
device
Grounding
(1) Independent grounding Best (2) Shared grounding Good