Mitsubishi Electric MELSEC iQ-F Series User Manual page 59

Current consumption calculation method
The following shows how to calculate current consumption.
The same calculation method applies to the CPU module, the powered input/output module, and the extension power supply
module.
However, the calculation method is different at the following points for the FX5S CPU module and the FX5UJ CPU module.
Module
FX5S CPU module
FX5UJ CPU module
1.
Check the power supply capacity of the CPU module, powered input/output module, or extension power supply module
being used.
Ex.
For the FX5U CPU module
Module
CPU module
Ex.
For the FX5UJ CPU module
Module
CPU module
For the FX5UJ CPU module, calculation of the current consumption of the 5VDC power supply is not required.
*1 Value when 24VDC service power supply is used for input circuits. The power supply capacity differs when external power supply is
used for input circuit.
2.
Check the current consumption of extension devices.
Ex.
For the FX5U CPU module
Module
Expansion board
Expansion adapter
Output module
Input module
Simple motion module
Bus conversion module
Analog input
*1 When using an external power supply for an input circuit, calculate current consumption of the 24VDC power supply as 0mA.
Total current consumption
• 5VDC power supply: 510mA
• 24VDC power supply: 240mA
Difference
Calculation of the current consumption of expansion adapters and expansion boards is not required. When using the
expansion adapters that require an external 24VDC power supply, prepare the external power supply.
Calculation of the current consumption of the 5VDC power supply is not required.
When supplying the power from a 24VCD service power supply to the expansion adapters (FX5-4DA-ADP, FX5-4A-
ADP) that require an external 24V power supply, calculation of the current consumption is required.
For extension modules, calculation of current consumption is not required when the total number of occupied I/O points
is within 32 and the number of extension modules is 2 or less. For extension modules connected after the limits are
exceeded, 200mA produced by the 24VDC power supply is consumed per module.
Model
FX5U-32MT/ES
Model
FX5UJ-40MT/ES
Model
FX5-232-BD
FX5-232ADP
FX5-16EYT/ES
FX5-16EX/ES
FX5-40SSC-S
FX5-CNV-BUS
FX3U-4AD
Power supply capacity
5VDC built-in power supply
900mA
Power supply capacity
5VDC built-in power supply
Calculation not required
Current consumption
5VDC power supply
20mA
30mA
100mA
100mA

150mA
110mA
2 SYSTEM CONFIGURATION
2.3 System Configuration Specifications
24VDC service power supply
*1
400mA
24VDC service power supply
*1
400mA
24VDC power supply

30mA
125mA
*1
85mA



2
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