Mitsubishi FX3U SERIES User Manual page 107

FX Series Programmable Controllers
3U
User's Manual - Hardwaer Edition
3
Determine whether the devices can be added to the extension power supply
unit.
Calculate the current to confirm whether the selected extension devices can be connected.
1. Calculate the current consumption of the built-in 5V DC power supply.
Capacity of 5V DC
power supply
Extension power
supply unit
5-
1
2. Calculate the available current supply from the internal 24V DC power supply.
Power supply
capacity for
internal 24V DC
Extension power
supply unit
5-
2
3. Calculate the available input/output occupied points (excluding the occupied input/output
by special function units/blocks).
Connectable I/O
occupied points
Extension power
supply unit
5-
3
If the calculation result for the 5V DC power supply is a negative value, the current consumption exceeds the
power supply capacity.
Reconfigure the system with an extension power supply unit.
If the calculation results for the internal 24V DC power supply and input/output occupied points are negative
values, the actual input/output occupied points exceed the connectable input/output occupied points.
Reconfigure the system with an input/output powered extension unit.
Current consumption
Total of current consumed
by extension devices
6-
1
-
mA mA
Current consumption
Total of current consumed
by extension devices
-
6-
2
mA mA
Number of I/O
occupied points
Total of I/O occupied points
by extension devices
6-
3
-
points points
6 Examination of System Configuration
6.7 Expansion of Extension Power Supply Unit (FX3U-1PSU-5V)
Calculation result
≥
=
mA
Calculation result
≥
=
mA
Calculation result
≥
=
points
0mA
0mA
0points
101
1
2
3
4
5
6
7
8
9
10