5 INSTALLATION AND WIRING
5.7 Wiring
131
5
Grounding
Observe the following:
• Provide independent grounding when possible. Ground the FG and LG terminals to the protective ground conductor
dedicated to the programmable controller (ground resistance: 100 ohms or less).
• If independent grounding cannot be provided, employ (2) Shared grounding shown below.
• Use the thickest cable (maximum of 2). Bring the grounding point close to the programmable controller as much as
possible so that the ground cable can be shortened.
(1) Independent grounding: Recommended
(2) Shared grounding: Allowed
(3) Common grounding: Not allowed
(1) (2) (3)
Programmable
controller
Equipment
Programmable
controller
Equipment
Programmable
controller
Equipment
Ground
resistance of
100Ω or less
Ground
resistance of
100Ω or less
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