Nx-Series Power Supply-Related Units - Omron NX Series Hardware User Manual

I/O Power Supply
I/O power is supplied to the I/O circuits of each NX Unit on the CPU Rack of the NX102 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-series
NX102 CPU Unit
NX bus connector
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.
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NX-series Power Supply-related Units

There are three types of NX-series power supply-related Units: Additional NX Unit Power Supply Unit,
Additional I/O Power Supply Unit, and I/O Power Supply Connection Unit. The following table explains
each Unit.
Unit name
Additional NX
Unit Power Sup-
ply Unit
NX-series NX102 CPU Unit Hardware User's Manual (W593)
NX Units (32 max.)
Additional I/O Power Supply Unit
I/O power supply
I/O power supply
terminals
I/O power supply
(24 VDC, etc.)
Supply additional NX Unit power via this Unit if the total power consumption of the internal
circuits of the NX Units on the CPU Rack exceeds the NX Unit power supply capacity of the
CPU Unit.
4 Designing the Power Supply System
End Cover
To external devices
Description
4
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