Omron NXR Series User Manual page 56

4 Designing the Power Supply System
Conditions for Digital I/O Variable Hub
I/O connectors Pin name
Port 1 to port 5
Port 6 to port 8
 Calculating Current Consumption
The items to calculate for the total current consumptions from Unit/input power supply and output
power supply are as follows.
Power supply
type
Unit/input power
supply
Output power
supply
The results above give the total current consumption from Unit/input power supply and the total
current consumption from output power supply below:
a. Total current consumption from Unit/input power supply
= (Current consumption from Unit/input power supply) + (Current consumed between the Digital
I/O Variable Hub and input devices)
= 0.04 A + 0.34 A
= 0.38 A
This example is acceptable because the calculation result is below 0.84 A, the maximum cur-
rent of Unit/input power supply.
b. Total current consumption from output power supply
= (Current consumption from output power supply) + (Current consumed between the Digital
I/O Variable Hub and output devices)
= 0.04 A + 1.8 A
= 1.84 A
This example is acceptable because the calculation result is below 2.0 A, the maximum current
of output power supply.
4-6
I/O function settings
Pin 4 Input (input current 4.0
mA)
Pin 2 Input (input current 4.0
mA)
Pin 4 Output
Pin 2 Output
Item to calculate for current con-
sumption
Current consumption from Unit/
input power supply
Current consumed between the
Digital I/O Variable Hub and input
devices
Current consumption from output
power supply
Current consumed between the
Digital I/O Variable Hub and output
devices
Conditions for connected external device
Product name
Three-wire sensor Current consumption: 30 mA
Three-wire sensor Current consumption: 30 mA
Solenoid valve Load current: 0.3 A
Solenoid valve Load current: 0.3 A
Calculation result
40 mA according to the specifications of the Digital
I/O Variable Hub.
(Sum of the currents consumed by the input devi-
ces) + (Input current to the Digital I/O Variable Hub
× Number of inputs used)
= (30 mA × 10 points) + (4 mA × 10 points)
= 0.34 A
40 mA according to the specifications of the Digital
I/O Variable Hub.
(Load current × Number of outputs used)
= 0.3 A × 6 points
= 1.8 A
NXR-series IO-Link I/O Hub User's Manual (W620)
Specification