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E-11
3 Wiring
3.3 Wiring to Power Supply Terminals
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
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4DA (4-channel Analog Output)
3.3 Wiring to Power Supply Terminals
3.3.1 Examples of Power Supply Circuit
Below are examples of circuits for using the 24V DC service power supply of the FX3G/FX3U Series PLC.
1) Sink input [- common] wiring
2) Source input [+ common] wiring
3.3.2 Cautions regarding wiring to the power supply terminals
• Ground the " " terminal and " " terminal to the Class - D grounding line (100 Ω or less) together
with the ground terminal of the main unit.
• For the timing of power-on/off when using an external power supply, see the following manual of the
connected PLC.
→ Refer to the FX
3G Series User's Manual - Hardware Edition.
→ Refer to the FX3U Series User's Manual - Hardware Edition.
Class-D
grounding
L N
FX
3G/FX3U Series PLC
(main unit)
24+ 24-S/S 0V 24V
+15V
-15V
FX
3U-4DA
AC power
100 to 240 V
Connect the "S/S" terminal of the main unit to the "24V" terminal.
Class-D
grounding
L N
(main unit)
24+ 24-S/S 0V 24V
+15V
-15V
FX
3U-4DA
AC power
100 to 240 V
Connect the "S/S" terminal of the main unit to the "0V" terminal.
FX3G/FX3U Series PLC