Omron PROFINET NX-PNC202 User Manual page 94

5 Designing the Power Supply System
• When Total Current Consumption for All Blocks Does Not Exceed the Rated Current
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
Unit power
supply terminals
I_unit1
I_io1
Protective
device
I/O power
supply
Protective
device
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.
5 - 22
Block that is supplied I/O power from the PROFINET
Coupler Unit
Block that is supplied
Block that is supplied Unit
Unit power from the
power from the PROFINET Additional NX Unit
Coupler Unit Power Supply Unit
NX Unit
NX Unit NX Unit
Additional NX Unit Additional NX Unit
power power
Power Supply Unit Power Supply Unit
supply supply
Internal
power
supply
circuit
I/O power supply I/O power supply
Unit power Unit power
terminals terminals supply terminals supply terminals
I_unit2
Block that is supplied I/O
power from the Additional I/O
Power Supply Unit
Additional I/O Additional I/O
Power Supply Unit Power Supply Unit
Internal
power
supply
circuit
I/O power supply terminals I/O power supply terminals
I_io2
NX-series PROFINET Coupler Unit User's Manual (W623)
*1
NX Unit NX Unit
power supply power supply