Mitsubishi GOT MELSEC A985GOT-TBA-EU User Manual page 35

(2) Grounding
For grounding, perform the following:
Use a dedicated grounding wire as far as possible. (Grounding
resistance of 100
When a dedicated grounding cannot be performed, use (2) Common
Grounding shown below.
Also, be sure to take noise countermeasures other than grounding.
Power
GOT
equipment
Grounding
(Class 3 grounding)
(1) Independent grounding
For grounding a cable, use the cable of 2 mm
Position the ground-contact point as closely to the sequencer as
possible, and reduce the length of the grounding cable as much as
possible.
(a) An example of independent grounding
Power equipment
(Servo, etc.)
CN1A CN1B
CN2 CN3
FG
Panel
grounding
Grounding for
power system
* For control system grounding, apply single-point grounding for one
system.
Especially for the devices communicating each other, be sure to
earth the grounding wire at one point.
or less.)
GOT
Grounding
(Class 3 grounding)
Best (2) Common grounding
FG
LG
Grounding
terminal
block
Power
equipment
Good
2
or more.
Connection cable
Grounding terminal block
Grounding for
control system
24
Power
GOT
equipment
(3) Joint grounding Not allowed
GOT
FG
LG