Mitsubishi Electric GOT SIMPLE Series User Manual page 293

Grounding status of the control panel where the GOT is installed
■Actual status
A ground cable is led from the control panel where control equipment such as a PLC is installed to the control panel where the
GOT is installed.
Connection
cable
Ground cable led from the
panel having the control
FG
equipment
■Corrective action for when it is true
• Measure 1
Connecting a ground cable to the panel where the GOT in installed as shown in Figure A reduces electric potential difference
between the ground points, which may avoid malfunction of the GOT.
If the wiring shown in Figure A cannot be carried out, perform the wiring as shown in Figure B.
Figure A
Connection
cable
GOT
FG
Ground cable
Use a short and
Ground to
thick wire as
the panel.
possible.
• Measure 2
Attaching a ferrite core to the ground cable connected to the control panel where the GOT is installed, as shown in Figure C,
will help minimize noise interference.
If the wiring shown in Figure C cannot be carried out, perform the wiring as shown in Figure D.
Figure C
Connection
cable
GOT
FG
Ferrite core
Ground cable
Ground to
Use a short and
the panel.
thick wire as
possible.
Check result
□ True
□ False
GOT
Figure B
Ground cable
Figure D
Ground cable
Connection
cable
GOT
FG
Ground to
the panel.
Connection
cable
GOT
FG
Ferrite core
Ground to
the panel.
22.1 GOT Restoration Sheets
Result
□ Effective
□ Ineffective
Result
□ Effective
□ Ineffective
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