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4 SYSTEM CONFIGURATION
4.4 Limitation on Current Consumption
4.4 Limitation on Current Consumption
Power required for expansion adapters, expansion boards, and extension modules is supplied from the CPU module or
extension power supply module. The number of extension devices that can be connected must be determined from the
capacity of the power supply.
Power supply check from the CPU module (current consumption
calculation)
Check if power can be supplied to extension devices with the power supply capacity of the CPU module.
Calculate following the procedure below.
1. Check the power supply capacity of the CPU module used. (Page 32 CPU Module)
*1 Value when 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.
(Page 33 I/O Module), (Page 34 Intelligent Function Module)
*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.
Type Model Power supply capacity
5 V DC power supply 24 V DC service power supply
CPU module FX5U-32MT/ES 900 mA 400 mA
*1
Type Model Current consumption
5 V DC power supply 24 V DC power supply
Expansion board FX5-232-BD 20 mA
Expansion adapter FX5-232ADP 30 mA 30 mA
Output module FX5-16EYT/ES 100 mA 125 mA
Input module FX5-16EX/ES 100 mA 85 mA
*1
Simple motion module FX5-40SSC-S
Bus conversion module FX5-CNV-BUS 150 mA
Analog input FX3U-4AD 110 mA
Power supply type Total current consumption
5 V DC power supply 510 mA
24 V DC power supply 240 mA
Power supply from CPU module
CPU module
Expansion
adapters
Expansion
board
Output
module
Input
module
FX5
Intelligent
module
FX3
Intelligent
module
Bus
conversion
module
Ex.
Ex.
Ex.
Ex.