Mitsubishi Electric MELSEC iQ-F Series User Manual page 62

When connecting an input module after (on the right side of) the extension power supply module
When using 24 V DC 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.
CPU module,
Powered
input/output
Power supply from CPU module or
powered input/output module
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 extension power supply module is permitted.
• 5 V DC power supply
Capacity of 5 V DC
power supply
Extension power
supply module
mA
Ex. 1200 mA
• 24 V DC power supply
Capacity of 24 V DC
power supply
Extension power
supply module
mA
300 mA
Ex.
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.
4 SYSTEM CONFIGURATION
60
4.4 Limitation on Current Consumption
Input Intelligent
module module
module
Current consumption
Total of current consumed
by extension module
-
mA
400 mA
Current consumption
Total of current
consumed by extension
module
-
mA
125 mA
Extension
Input Intelligent
power
module module
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.
Total current consumption
400 mA
125 mA
Calculation result
=
mA
800 mA
Calculation result
=
mA ≥
175 mA
0 mA
≥
0 mA