5 Designing the Power Supply System
5 - 16
NX-series EtherCAT Coupler Unit User’s Manual (W519)
The total of the required Unit power supply capacity for these two blocks is the required power sup-
ply capacity of the Unit power supply for the EtherCAT Slave Terminal.
Precautions for Correct Use
Use the same Unit power supply to supply the Unit power to the entire Slave 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 malfunction.
Calculation Example
This section provides a calculation example for the configuration example that is given in
culation Example for the NX Unit Power Supply
• The NX Unit power supply efficiency of the EtherCAT Coupler Unit is 70%.
In this configuration example, there is only one block, the EtherCAT Coupler Unit block.
Required power supply capacity of Unit power supply to EtherCAT Slave Terminal
= Required Unit power supply capacity of EtherCAT Coupler Unit block
= (Power consumption from NX Unit power supply of EtherCAT Coupler Unit + Total power con-
sumption from NX Unit power supply of NX Units connected to EtherCAT Coupler Unit)/NX
Unit power supply efficiency of EtherCAT Coupler Unit
= (1.45 W + (0.5 W × 5) + (0.8 W × 5))/0.7
= Approx. 11.4 W
Precautions for Correct Use
Consider the inrush current when the power supply is turned ON and select a Unit power sup-
ply with sufficient extra capacity. The inrush current when power is turned ON may prevent the
Unit power supply from operating correctly.
Name
Model
Quantity
Power consumption/Unit
EtherCAT Coupler Unit
NX-ECC201
1
1.45 W
Digital Input Unit
NX-ID3317
5
0.5 W
Relay Output Unit
NX-OC2633
5
0.8 W
∙ ∙ ∙
Unit power
supply
Unit power
supply terminals
Additional NX Unit Power Supply Unit
Internal power supply circuits
Unit power
supply terminals
EtherCAT Coupler Unit block
Additional NX Unit Power Supply Unit block
NX Units connected to the
EtherCAT Coupler Unit
NX Units connected to the Additional
NX Unit Power Supply Unit
NX Unit power supply
EtherCAT
Coupler Unit
NX Unit power supply
End Cover
Summary of Contents for NX-ECC201
Page 38: ...Sections in this Manual 36 NX series EtherCAT Coupler Unit User s Manual W519...
Page 46: ...1 EtherCAT Networks 1 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 56: ...2 Features and System Configuration 2 10 NX series EtherCAT Coupler Unit User s Manual W519...
Page 82: ...4 Part Names and Functions 4 14 NX series EtherCAT Coupler Unit User s Manual W519...
Page 100: ...5 Designing the Power Supply System 5 18 NX series EtherCAT Coupler Unit User s Manual W519...
Page 214: ...9 Setting Up Slave Terminals 9 44 NX series EtherCAT Coupler Unit User s Manual W519...
Page 254: ...11 EtherCAT Coupler Unit Functions 11 30 NX series EtherCAT Coupler Unit User s Manual W519...
Page 278: ...12 Communications Performance 12 24 NX series EtherCAT Coupler Unit User s Manual W519...
Page 340: ...14 Maintenance and Inspection 14 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 400: ...Appendices A 60 NX series EtherCAT Coupler Unit User s Manual W519...
Page 401: ...Index 1 NX series EtherCAT Coupler Unit User s Manual W519 I Index...
Page 405: ......