Omron NX Series User Manual page 85

However, fewer protective devices may be required when the current consumption of each block
does not exceed the rated current value. An example of this is shown below.
Using unwired Unit power supply terminals
In this example, the current consumption from each power supply is as follows.
Current consumption from Unit power supply: I_unit1+ I_unit2 ≤ Lowest rated current
Current consumption from I/O power supply: I_io1+ I_io2 ≥ Lowest rated current
EtherCAT
Coupler Unit
Unit power
supply
terminals
I_unit1 + I_unit2
Protective
device
I_io1
Unit power
supply
NX-series System Unit User's Manual (W523)
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Block that is supplied I/O power from
the EtherCAT Coupler Unit
Block that is supplied
Unit power from the
EtherCAT Coupler
Unit
NX Unit
NX Unit power
supply
Internal
power
supply
circuit
I/O power
supply
Protective
terminals
device
I/O power
supply
I_unit2
Block that is supplied
I/O power from an
Additional I/O Power
Supply Unit
Block that is supplied
Unit power from an
Additional NX Unit
Power Supply Unit
NX Unit power supply
Additional NX Unit Additional I/O Power
Power Supply Unit Supply Unit
Internal
power
supply
circuit
Unit power supply
I_io2
terminals
Protective
device
4 Installation and Wiring
I/O power supply
terminals
4
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