Grounding - Mitsubishi Electric Q26UD(E)HCPU User Manual

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.
Programmable
controller
resistance of
100
(1) Independent grounding
• Use thick cables up to 2mm
possible so that the ground cable can be shortened.
116
Programmable
Equipment
controller
Ground
or less
Recommended (2) Shared grounding
2
. Bring the grounding point close to the programmable controller as much as
Programmable
Equipment
Ground
resistance of
100 or less
Allowed (3) Common grounding
Equipment
controller
Not allowed