Omron NX1P2 series

4 Designing the Power Supply System
4 - 24
NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
• 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 I/O power supply for NX Units: I_io1+I_io2  4 A (rated current for I/O
power supply)
External devices
End
Cover
Built-in I/O
Internal
circuits
NX Unit power supply
Unit power supply
terminals
Internal
power
supply
circuit
NX-series
NX1P2 CPU
Unit
I_unit1
I_ioB
I_unit2
I_io1 I_io2
I/O power
supply
I/O power
supply
Block that the CPU Unit supplies Unit power supply.
Block that an Additional I/O
Power Supply Unit 1 supplies
I/O power supply.
Block that an Additional I/O
Power Supply Unit 2 supplies
I/O power supply.
Block that an Additional NX Unit Power Supply
Unit supplies Unit power supply.
External devices
Additional
I/O Power
Supply
Unit 1
Additional
I/O Power
Supply
Unit 2
Additional
NX Unit
Power
Supply Unit
NX Unit power supply
Unit power
supply terminals
I/O power
supply
terminal
I/O power
supply
terminal
Cn(+V)/0Vn
terminal
PNP (sourcing)
type only
Protective
device
Unit power
supply
(24 VDC)
I/O power supply
(24 VDC, etc.)
Power
supply
○
○ ○ ○ ○ ○ ○ ○ ○ ○
Protective
device