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5 Designing the Power Supply System
NX-series EtherCAT Coupler Unit User’s Manual (W519)
5-4
Selectin
g Ext
ernal Power Sup
p
lies
and
P
ro
tect
ive Devic
es
5
5-
4-1 Selecting t
he Unit Power Sup
ply
5-4
Selecting External Power Supplies
and Protective Devices
This section describes how to select the external power supplies and protective devices for the EtherCAT
Slave Terminal, i.e., the Unit power supply and the I/O power supplies.
This section describes how to select the Unit power supply for the EtherCAT Slave Terminal.
Use an SELV power supply that meets the following conditions for the Unit power supply.
• Has overcurrent protection.
• Has double or reinforced insulation between the input and output.
• Has an output voltage of 24 VDC (20.4 to 28.8 VDC).
Recommended Power Supplies: S8JX Series (manufactured by OMRON)
Formula
This section describes how to calculate the required capacity of the Unit power supply for the Ether-
CAT Slave Terminal.
Use the following formula to calculate the required Unit power supply capacity for each block in the
EtherCAT Slave Terminal.
Required Unit power supply capacity of each block = (A + B)/C
A: NX Unit power consumption of the Unit that supplies the NX Unit power
B: Total NX Unit power consumption of the NX Units that are connected to the Unit that supplies the NX Unit power
C: NX Unit power supply efficiency of the Unit that supplies the NX Unit power
Blocks
A block consists of the Unit that supplies the NX Unit power and the range of Units to which that Unit
supplies the NX Unit power. For example, in the configuration in the following figure there are two
blocks in the EtherCAT Slave Terminal: the block with the EtherCAT Coupler Unit and the block with
the Additional NX Unit Power Supply Unit.
5-4-1
Selecting the Unit Power Supply
Recommended Power Supplies
Calculating the Required Power Supply Capacity of the Unit Power
Supply
Required capacity of the Unit power supply
for the EtherCAT Slave Terminal
=
Total of required Unit power supply capacity
for each block
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: ......