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7.3 Grouding
7.3.1 Grounding the GOT
7.3 Grouding
7.3.1 Grounding the GOT
1 About grounding
Perform the following three items for grounding.
• Independent grounding should be performed as possible for the GOT.
Perform grounding works. (grounding resistance 100 or less)
• When independent grounding cannot be performed for the GOT, perform "(2) Shared grounding"
shown below.
• Use a cable of 2mm
2
or more for grounding when performing (1) or (2) above.
Ground the cable at a point as close to the GOT as possible to make the ground cable short.
2 Grounding examples
(1) Independent grounding (Best)
* For the control equipment, ground the system at one end.
Especially for the control equipments communicating each other, ground the system at one end.
GOT
Other
device
Grounding
(1) Independent ground
...... Best condition
GOT
Other
device
Grounding
(2) Shared grounding
...... Good condition
GOT
Other
device
(3) Common grounding
...... Not allowed
GOT
CN1A CN1B
CN2 CN3
FG
LG
Grounding for
control system
Ground
terminal
block
Connection cable
PLC
Panel
grounding
Grounding for
power system
FG
FG
LG
Power equipment
(servo, etc.)
Ground terminal block
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