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3 Configuration Units
NJ-series CPU Unit Hardware User’s Manual (W500)
3-3 Power Supply Units
3
3-3-3 Selecting a Power Supply Unit
These examples show how to calculate the power consumption (W) for the following system.
* The maximum load current of an Output Unit is the limit for the entire Unit.
Total Power Consumption of the Controller (W_Gross)
W_Gross = (1.9 + 0.09 2 + 0.17 2 + 0.58 2) A 5 V 0.7= 25.6 W
Basic I/O Unit Power Consumption (W_IO_ONOFF)
W_IO_ONOFF = 24 V 0.0041 A 64 points 2 Units + 0.1 V 6.4 A 2 Units = 13.9 W
Average Power Consumption (W)
W = W_Gross + W_IO_ONOFF = 39.5 W
Calculation Examples
Units Model Quantity 5 VDC Other
CPU Unit NJ501-1500 1 Unit 1.90 A ---
Input Units CJ1W-ID261 2 Units 0.09 A Rated input voltage: 24 V
Input current: 4.1 mA
Number of input points: 64
Output Unit CJ1W-OD261 2 Units 0.17 A Residual voltage: 0.1 V
Maximum load current: 6.4 A/Unit
Special I/O
Units
CJ1W-MAD42 2 Units 0.58 A ---
CPU Rack
Power Supply
Unit
NJ501-1500
CPU Unit
CJ1W-MAD42 × 2
Special I/O Units
CJ1W-ID261 × 2
CJ1W-OD261 × 2
Basic I/O Units
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