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4 SYSTEM CONFIGURATION
4.4 Limitation on Current Consumption
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
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.
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.
Power supply type
Total current consumption
5 V DC power supply
400 mA
24 V DC power supply
210 mA
Ex.
-
≥
0 mA
=
Ex.
Total of current consumed
by extension module
Current consumption
mA
400 mA
Powered input/output
module
Capacity of 5 V DC
power supply
mA
965 mA
Calculation result
mA
565 mA
mA
-
mA
Powered input/output
module
Current consumption
mA
≥
0 mA
=
Calculation result
Ex.
210 mA
250 mA
40 mA
Capacity of 24 V DC
service power supply
Total of current
consumed by extension
module
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