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4 SYSTEM CONFIGURATION
4.4 Limitation on Current Consumption
When connecting an input module after (on the right side of) the extension power supply module
When using service power supply of the CPU module or powered input/output module for input circuit of an
input module, include the input module in the 24 V DC current consumption calculation.
5 V DC power supply of the input module is supplied from the extension power supply module.
3. Calculate the total current consumption of each power supply.
4. Check if expansion to the extension power supply module is permitted.
• 5 V DC power supply
• 24 V DC power supply
If the calculation result is a negative value, the current consumption exceeds the power supply capacity of the extension
power supply module.
Reconfigure the system, adding powered input/output module or extension power supply modules.
Power supply type Total current consumption
5 V DC power supply 460 mA
24 V DC power supply 125 mA
Power supply from CPU module or
powered input/output module
CPU module,
Powered
input/output
module
Input
module
Input
module
FX5
Intelligent
module
FX5
Intelligent
module
Extension
power
supply
module
When the CPU module or powered input/output module
supplies the 24 V DC power supply for the input circuit, current
consumption of 24 V DC should be included in the supply
range from the CPU module or powered input/output module.
Ex.
mA
-
mA
Current consumption
mA
≥
0 mA
=
Calculation result
Ex.
460 mA1200 mA 740 mA
Capacity of 5 V DC
power supply
Extension power
supply module
Total of current
consumed by extension
module
mA
-
mA
Current consumption
mA
≥
0 mA=
Calculation result
Ex.
125 mA300 mA 175 mA
Capacity of 24 V DC
power supply
Extension power
supply module
Total of current
consumed by extension
module