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4.8.4 Grounding
For grounding, perform the following:
• Use a dedicated grounding wire as far as possible. (Grounding resistance of 100 or less.)
• When a dedicated grounding cannot be provided, use (2) Shared grounding shown below.
• Use thick cables up to 2mm
2
. Bring the grounding point close to the programmable controller as much as
possible so that the ground cable can be shortened.
(3) Common grounding Not allowed
Programmable
controller
Programmable
controller
Programmable
controller
Equipment Equipment
Equipment
(1) Independent grounding Recommended (2) Shared grounding Allowed
Ground
resistance of
100 or less
Ground
resistance of
100 or less
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