Omron PROFINET NX-PNC202, User Manual

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5 Designing the Power Supply System
NX-series PROFINET Coupler Unit User’s Manual (W623)
5-2 Designing the NX Unit Power Supply System
5
5-2-2 Calculation Exam
ple for the NX Unit Power Supply

NX Unit Power Supply Capacity and Restrictions
The internal power supply circuits of the PROFINET Coupler Unit or Additional NX Unit Power Sup-
ply Unit supply the NX Unit power to the NX Units.
The NX Unit power supply capacity does not include the NX Unit power consumption of the PROF-
INET Coupler Unit or Additional NX Unit Power Supply Units.
The NX Unit power supply capacity of the PROFINET Coupler Unit is restricted by the following
application conditions.
• Ambient operating temperature
• Installation orientation
Consider these conditions and determine the required NX Unit power supply capacity, and then
design the NX Unit power supply system.
Refer to
3-1-3 PROFINET Coupler Unit Specifications
on page 3-4 for restrictions on the PROFINET
Coupler Unit.
For restrictions on the Additional NX Unit Power Supply Unit, refer to the
NX-series System Units
User’s Manual
(Cat. No. W523).
Precautions for Correct Use
• Do not exceed the NX Unit power supply capacity. If you exceed the NX Unit power supply
capacity, malfunction may occur.
• Use the same Unit power supply to supply the Unit power to the entire IO Device Terminal. If
you supply power from different Unit power supplies, differences in electrical potential may
cause unexpected currents in the NX Unit power supply, which may result in failure or mal-
function.
This section provides a calculation example for the NX Unit power supply.

Unit Configuration Example

Application Conditions
The ambient operating temperature is 55  C and an upright installation orientation is used.

Calculating the Total Power Consumption from the NX Unit Power Supply
Calculate the total power consumption from the NX Unit power supply that is required by the NX
Units that are connected to the PROFINET Coupler Unit. The NX Unit power consumption of the
PROFINET Coupler Unit is not included in this calculation.
Total power consumption from NX Unit power supply [W] = (0.5 W × 5) + (0.8 W × 5) = 6.5 W

Confirming the NX Unit Power Supply Capacity of the PROFINET Coupler Unit
According to the graph in
Installation orientation and restrictions
on page 3-5 in
3-1-3 PROFINET
Coupler Unit Specifications
on page 3-4, the NX Unit power supply capacity is 8.5 W max. There-
fore, in this example, the total power consumption from the NX Unit power supply is 6.5 W, and the
NX Unit power supply capacity is 8.5 W max., so the design conditions are met.
5-2-2 Calculation Example for the NX Unit Power Supply
Name Model Quantity Power consumption/Unit
PROFINET Coupler Unit NX-PNC202 1 1.60 W
Digital Input Unit NX-ID3317 5 0.5 W
Relay Output Unit NX-OC2633 5 0.8 W