FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
116
6 Examination of System Configuration
6.7 Expansion of Extension Power Supply Unit (FX3U-1PSU-5V)
6.7 Expansion of Extension Power Supply Unit (FX3U-1PSU-5V)
If the selected devices in section 6.5 are not connectable due to the built-in 5V DC power shortage, add an
extension power supply unit.
1 Enter the current supply specification of the extension power supply unit.
The output current of the extension power supply unit is proportional to the ambient temperature as
shown by the derating curve below. Enter the output current value, based on this derating curve.
Also
verify that the number of occupied input/output points from input/output extension block(s)
connected to the extension power supply unit is less than 32.
Power
supply
classification
Classification
Number of
connected
units
Type
Capacity of built-in power
supply
Connectable
I/O occupied
points
[points]
5V DC power
supply [mA]
Power supply
for internal
24V DC [mA]
With built-in
power supply
Extension
power supply
unit
− FX
3U-1PSU-5V 32
0.8
1.0
Ambient temperature [°C]
5540
0.3
0.2
5V DC
Output current [A]
24V DC
0
Derating curve
5
5-
1
5-
2
5-
3
H1
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