Omron NX Series - Page 130

External devices
End
Cover
Internal circuits
NX Unit power supply
Unit power supply terminals
Internal
power
supply
circuit
NX-series
NX502 CPU Unit
I_unit1 I_unit2
I_io1 I_io2
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
terminals
I/O power
supply
terminals
Protective
device
I/O power supply
(24 VDC, etc.)
Power
supply
Protective
device
Unit power supply
(24 VDC)
Internal
circuits
NX Unit power supply
I/O power supplyI/O power supply
I/O power supplyI/O power supply
*1. The minimum value is selected among the rated currents of the multiple I/O power supply units connected to
the protective device. If, for example, two rated currents of 10 A and 4 A are used, 4 A will be selected.
4 Designing the Power Supply System
4-28
NX-series NX502 CPU Unit Hardware User's Manual (W629)