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6 Examination of System Configuration
6.7 Expansion of Extension Power Supply Unit (FX3U-1PSU-5V)
86
FX3G Series Programmable Controllers
User's Manual - Hardware Edition
6.7 Expansion of Extension Power Supply Unit (FX3U-1PSU-5V)
Select the extension power supply unit for adding special function blocks when extension is prohibited in the
AC power supply type main unit due to restrictions in connection described in Section 6.5.
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.
2 Enter the specifications for the products to be added.
Enter the data on the input/output extension blocks and special function units/blocks to be con-
nected to the input/output powered extension unit, and calculate the current.
→ For the data on the number of input/output occupied points and current consumption of each type,
refer to Section 6.8.
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
-FX3U-1PSU-5V 32
Power supply
classification
Classification
Number of
connected
units
Type
Capacity of built-in power supply
Number of
I/O occupied
points
*1
{points]
5V DC power
supply [mA]
Power supply for
internal 24V DC
[mA]
Enter the
products
connected to
the extension
power supply
unit
Input/output
extension
block
*2
-
FX2N- -
FX2N- -
FX2N- -
FX2N- -
Special
function
unit/block
8
*3
FX2N/FX3U- -
FX2N/FX3U- -
FX2N/FX3U- -
FX
2N/FX3U- -
FX
2N/FX3U- -
FX
2N/FX3U- -
FX
2N/FX3U- -
FX2N/FX3U- -
Calculate the totals
0.8
1.0
Ambient temperature [°C]
5540
0.3
0.2
5V DC
Output current [A]
24V DC
0
Derating curve
3
3 -1
3 -2
3 -3
D1
4
B2
C
4 -1 4 -2 4 -3