Omron PROFINET NX-PNC202 User Manual page 93

• 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 IO power supply: I_io1 + I_io2  Lowest rated current
PROFINET
Coupler Unit
I_unit1
Unit power
supply terminals
I_unit1 + I_unit2
Unwired
terminals
Protective
device
I_io1
I/O power
Unit power
supply
*1. This is the lowest rated current of all of the Units that supply IO power and are connected to protective
devices. For example, if terminals with both a 10-A and 4-A capacities are connected, the value is 4 A.
NX-series PROFINET Coupler Unit User's Manual (W623)
Block that is supplied I/O power from the PROFINET
Coupler Unit
Block that is supplied Unit
power from the PROFINET
Coupler Unit
NX Unit
NX Unit NX Unit
power power
supply supply
Internal
power
supply
circuit
I/O power I/O power
supply supply
terminals terminals
Protective
device
supply
I_unit2
5 Designing the Power Supply System
Block that is supplied I/O
power from the Additional
I/O Power Supply Unit
Block that is supplied
Unit power from the
Additional NX Unit
Power Supply Unit
Additional I/O Additional I/O
Power Supply Unit Power Supply Unit
Additional NX Unit Additional NX Unit
Power Supply Unit Power Supply Unit
Internal
power
supply
circuit
Unit power
I/O power supply terminals I/O power supply terminals
I_io2
supply terminals
Protective
device
*1
NX Unit NX Unit
power supply power supply
5
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