Mitsubishi Electric GOT2000 Series Hardware User Manual page 325

Grounding examples
■Independent grounding (Best)
For grounding for control system, ground the system at one end.
Especially for the control devices communicating each other, ground the system at one end.
Power equipment
(such as servo)
FG
CN1A CN 1B
LG
CN2 CN3
FG
Ground
Panel terminal
grounding
block
Grounding for
power system
■Shared grounding (Good)
Ground the system at one end.
To prevent noise from entering the GOT, use a short and thick wire for grounding between the ground and the control panel to
lower ground resistance.
Power equipment
(such as servo)
FG
CN1A CN 1B
LG
CN2 CN3
FG
Panel grounding
Use as short and thick a wire as possible.
■Common grounding (Not allowed)
Do not connect the ground cables of the power equipment and control equipment with a wire.
When the cables are connected, noise from the power equipment may affect the control equipment, causing a malfunction.
Power equipment
(such as servo)
CN1A CN1B
FG
LG
CN2 CN3
FG
The power equipment
and the control
equipment are
connected with a wire.
Panel grounding
Connection cable
GOT
FG
LG
Ground terminal block
Grounding for
control system
Connection cable
GOT
FG
LG
Panel grounding
Connection cable
FG
LG
Panel grounding
GOT
8 WIRING OF POWER SUPPLY SECTION
8
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8.3 Grounding