Chapter 2 - Calculating the power supply for components
Module Types of Model Current consumption (mA)
FEnet Module 2MLL-EFMF 650
2MLL-EFMT 420
Snet Module 2MLL-C22A 330
2MLL-C42A 300
2MLL-CH2A 340
Profibus-DP Module 2MLL-PMEA 560
Profibus Remote Interface 2MLL-PSRA 550
Profibus Remote Slave Interface 2MLL-PSEA 550
2.2 Selecting the power supply
The selection of a power module is determined by the current and voltage needed by the system. The
voltage requirement of a system is calculated as the sum of the current consumption by the digital I/O
modules, special modules, CPU module, power module and the communication module (installed on
the same base as the power module.)
The system does not operate normally, if the rated output capacity of the power module exceeds the
predefined limit.
Example of current consumption/power calculations for ML200-IEC
The following table describes which power supply module must be used in coordination with the
corresponding modules for ML200-IEC.
Type Model Quantity Voltage (5V)
CPU module 2MLI-CPUU 1 0.96A
12 Slot basic base 2MLB-M12A - -
Input module 2MLI-D24A 4 0.2A
Output module 2MLQ-RY2A 4 2.0A
FDEnet module 2MLL-EDMF 2 1.3A
Profibus-DP 2MLL-PMEA 2 1.12A
Current consumption Calculation 0.96+0.2+2+1.3+1.12
Result 5.58A
Power consumption Calculation 5.58×5V
Result 27.9W
As the value of 5V current consumption is 5.58A, use 2MLP-ACF2 (5V: 6A) or 2MLP-AC23 (5V: 8.5A).
The system does not operate if 2MLP-ACF1 (5V: 3A) is used.
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