Calculation Examples; Average Power Consumption (W) - Omron CJ2 CPU UNIT User Manual

2 Basic System Configuration and Devices

Calculation Examples

These examples show how to calculate the power consumption (W) for the following system.
CPU Rack
Power Supply
Unit
CJ2H-CPU68-EIP
CPU Unit
Units
CPU Unit CJ2H-CPU68-EIP
Input Units CJ1W-ID261
Output Unit CJ1W-OD261
Special I/O CJ1W-MAD42
Units
Basic PLC Power Consumption (W_PLC)
W_PLC = (0.82 + 0.09 × 2 + 0.17 × 2 + 0.58 × 2) A × 5 V ÷ 0.7= 17.86 W
Basic I/O Unit Power Consumption (W_IO_ONOFF)
W_IO_ONOFF = 24 V × 0.0041 A x 128 points + 0.1 × 0.3 A × 128 points = 16.43 W

Average Power Consumption (W)

W = W_PLC + W_IO_ONOFF = 34.29 W
2-26
CJ1W-MAD42 × 2
Special I/O Units
CJ1W-ID261 × 2
CJ1W-OD261 × 2
Basic I/O Units
Model Quantity
1 Unit
2 Units
2 Units
2 Units
5 VDC
0.82 A ---
0.09 A Rated input voltage: 24 V
Input current: 4.1 mA
Number of input points: 64
0.17 A Residual voltage: 0.1 V
Maximum load current: 0.3 A
Number of output points: 64
0.58 A ---
CJ2 CPU Unit Hardware User's Manual
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