Omron NX1P2 series

4 Designing the Power Supply System
4 - 14
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
(a) Unit Specifications
(b) Calculations
The current consumption from the I/O power supply for each Unit is calculated as follows.
The required power supply capacity for the I/O power supply is calculated as follows.
Model Current consumption from I/O power supply Input current
NX-PF0730 10 mA ---
NX-ID3317 0 mA 6 mA/point
NX-OD3121 10 mA ---
NX-PF0730 Current Consumption = Current consumption from I/O power supply
= 10 mA
NX-ID3317 Current Consumption = Current consumption from I/O power supply + (Input current ×
Number of inputs used) + Total current consumption of con-
nected input devices
= 0 mA + (6 mA × 4 points) + (50 mA × 4 points)
= 224 mA
NX-OD3121 Current Consumption = Current consumption from I/O power supply + Total load cur-
rent of connected loads + Total current consumption of con-
nected output devices
= 10 mA + (125 mA × 4 points) + (50 mA × 4 points)
= 710 mA
Power supply capacity of I/O power supply = (Current consumed by NX-PF0730) + (Current consumed by
NX-ID3317) + (Current consumed by NX-OD3121)
= 10 mA + 224 mA +710 mA
= 944 mA