a. Unit Specifications
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 ---
b. Calculations
The current consumption from the I/O power supply for each Unit is calculated as follows.
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 con-
sumption of connected 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
current of connected loads + Total current consumption
of connected output devices
=
10 mA + (125 mA × 4 points) + (50 mA × 4 points)
= 710 mA
The required power supply capacity for the I/O power supply is calculated as follows.
Power supply capacity of I/O power sup-
ply
= (Current consumed by NX-PF0730) + (Current con-
sumed by NX-ID3317) + (Current consumed by NX-
OD3121)
= 10 mA + 224 mA +710 mA
= 944 mA
4 Designing the Power Supply System
4-17
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
4-3 Designing the I/O Power Supply System
4
4-3-2 Designing the I/O Power Supply from the NX Bus
To Next Page
Loading...
Need help?
General
