H-15
3 Wiring
3.3 Power Supply Line
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX
3U
-3A-ADP (2-channel Analog Input, 1-channel Analog Output)
A
Common Items
B
FX
3U
-4AD
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3G
-2AD-BD
E
FX
3U
-4DA
F
FX
3U
-4DA-ADP
G
FX
3G
-1DA-BD
H
FX
3U
-3A-ADP
I
FX
3U
-4AD-PT
-ADP
J
FX
3U
-4AD-PTW
-ADP
3.3 Power Supply Line
Connect the 24 V DC power supply line of the 3A-ADP to the 24+ and 24- terminals of the terminal block.
3.3.1 To connect to the FX3S/FX3G/FX3U Series PLC
Caution regarding connection of the power supply line:
• Ground the " " terminal to a class-D grounded power supply line (100 Ω or less) together with the
grounding terminal of the PLC main unit.
• When using an external power supply, turn it ON at the same time with the main unit or earlier than the
main unit. When turning OFF the power, confirm the safety of the system, and then turn OFF the power of
the PLC (including special adapter) at the same time.
3.3.2 To connect to the FX3GC/FX3UC Series PLC
Example of wiring of FX3UC Series PLC
For example of wiring of FX
3GC Series PLC, refer to the following manual.
→ Refer to the FX
3GC Series User’s Manual - Hardware Edition
"Section 4.2 Example External Wiring".
Cautions regarding connection of the power supply line:
• For the 24 V DC power supply line, be sure to use the same power as the FX
3GC/FX3UC Series PLC.
• Ground the " " terminal to a class-D grounded power supply line (100 Ω or less) together with the
grounding terminal of the PLC main unit.
24V DC
Class-D
grounding
Terminal
block
3A-ADP
+15V
24-24+
1. To use an External power supply
FX
3S
/FX
3G
/FX
3U
Series PLC
(Main unit)
Fuse
Class-D
grounding
Terminal
block
3A-ADP
+15V
24-24+
0V24V
2. To use the 24 V DC power of the PLC
FX
3S
/FX
3G
/FX
3U
Series PLC
(Main unit)
24V DC
Class-D
grounding
Terminal
block
3A-ADP
GreenRed
Black
FX
3UC
Series PLC
(Main unit)
Power
connector
24-24+
+15V
24-
24+
Fuse
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