Omron NX Series Hardware User Manual

Internal
circuits
End
Cover
NX Unit power supply
Unit power supply
terminals
NX Units (63 max.)X Bus Units (4 max.)
Internal
power
supply
circuit
NX-series
NX502
CPU Unit
Unit power supply
(24 VDC)
Internal
circuits
Internal
circuits
Internal
circuits
Internal
circuits
Internal
circuits
Internal
circuits
Internal
circuits
NX bus connector
X Bus connector
I/O Power Supply
I/O power is supplied to the I/O circuits of each NX Unit on the CPU Rack of the NX502 CPU Unit, as
well as to external devices connected to the NX Units.
Some NX Units receive I/O power through the NX bus, and others receive from external devices. If
any NX Unit on the CPU Rack receives I/O power through the NX bus, you need to prepare an exter-
nal I/O power supply device. For details on how to supply I/O power to NX Units, refer to the datasheet
included in the user’
s manuals for the NX Units.
To connect an external I/O power supply, you need an Additional I/O Power Supply Unit. Connect its
power supply terminals to the I/O power supply.
The I/O power supply can provide up to 10 A for NX Units via the NX bus connectors.
NX Units (63 max.)
To external devices
End Cover
I/O power supply
terminals
NX bus connector
NX-series NX502
CPU Unit
Additional I/O
Power Supply Unit
I/O power supply
(24 VDC, etc.)
I/O power supplyI/O power supply
Precautions for Correct Use
Make sure to prepare separate power supply devices for NX Unit power and I/O power. Using
the same power supply for them may generate noise and result in malfunction.
4 Designing the Power Supply System
4-3
NX-series NX502 CPU Unit Hardware User's Manual (W629)
4-1 Power Supply System
4
4-1-1 Unit Power Supply and I/O Power Supply

Omron NX Series Specifications

General

Brand	Omron
Model	NX Series
Category	Controller
Language	English