Mitsubishi Electric MELSEC iQ-F FX5U User Manual page 59

2.
Check the current consumption of extension devices.
(Page 39 Extension Module)
(Page 42 Extension Module)
Ex.
Type
Expansion board
Expansion adapter
Output module
Input module
Simple motion module
Bus conversion module
Analog input
*1 If using external power supply for input circuit, calculate current consumption of 24 V DC power supply as 0 mA.
3.
Calculate the total current consumption of each power supply.
Ex.
Power supply type
5 V DC power supply
24 V DC power supply
4.
Check if expansion to the CPU module is permitted.
• 5 V DC power supply
Capacity of 5 V DC
power supply
CPU module
-
mA
Ex. 900 mA
• 24 V DC power supply
The value obtained by this calculation (when the value is positive) indicates the remaining capacity of 24 V DC service power
supply, and the capacity can be used for external loads.
Capacity of 24 V DC
power supply
CPU module
-
mA
400 mA
Ex.
If the calculation result is a negative value, the current consumption exceeds the power supply capacity of the CPU module.
Reconfigure the system, adding powered input/output module or extension power supply modules.
Model
FX5-232-BD
FX5-232ADP
FX5-16EYT/ES
FX5-16EX/ES
FX5-40SSC-S
FX5-CNV-BUS
FX3U-4AD
Total current consumption
510 mA
240 mA
Current consumption
Total of current
consumed by extension
module
=
mA
510 mA
Current consumption
Total of current
consumed by extension
module
=
mA
240 mA
Current consumption
5 V DC power supply
20 mA
30 mA
100 mA
100 mA

150 mA
110 mA
Calculation result
mA ≥
390 mA
Calculation result
mA ≥
160 mA
4.4 Limitation on Current Consumption
24 V DC power supply

30 mA
125 mA
*1
85 mA



0 mA
0 mA
4 SYSTEM CONFIGURATION
4
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