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5 Wiring
5.2 Power Supply Wiring
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FX3U-CF-ADP User's Manual
5.2 Power Supply Wiring
5.2.1 Power supply wiring
*1. The expansion board is required when connecting with the FX3UC-32MT-LT PLC.
Power-on/off timing
The CF-ADP power supply should be turned ON simultaneously with or before the power supply of the PLC
main unit. Before turning the power OFF, ensure the safety of the system and then simultaneously turn the
main unit, CF-ADP, and other extension equipment (the special extension equipment is included) OFF.
For details, refer to the respective PLC manual.
→ Refer to the FX
3U Hardware Edition
→ Refer to the FX
3UC Hardware Edition
5.3 Grounding
Ground the cables as follows
• The grounding resistance should be 100 or less.
• Independent grounding should be established whenever possible.
Independent grounding should be performed for best results.
When independent grounding is not configured, perform "shared grounding" as shown in the following
figure.
For details, refer to the respective PLC manual.
→ Refer to the FX
3U Hardware Edition
→ Refer to the FX
3UC Hardware Edition
• The grounding point should be close to the CF-ADP, and all grounding wires should be as short as
possible.
Grounding
FX
3U
PLC
[Main unit]
CF-ADP
24+24-
Grounding
Stabilized
power supply
24V DC
Power connector
GreenRedBlack
Expansion
board
FX
3UC PLC
[Main unit]
Grounding
CF-ADP
24+24-
Grounding
Stabilized
power supply
24V DC
Power connector
GreenRedBlack
Expansion
board
*1
CF-ADP
Other
equipment
Shared grounding
Good condition
Common grounding
Not allowed
Independent grounding
Best condition
CF-ADP
Other
equipment
CF-ADP
Other
equipment