Power Supply Types And Wiring; Applications Of I/O Power Supply And Supply Methods - Omron NX-AD series User Manual

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Power Supply Types and Wiring

There are the following two types of power supplies that supply power to the NX Units.
Power supply
name
NX Unit power
supply
I/O power supply
The method for supplying power to the NX Units and the wiring method depend on the specifications for
the CPU Unit to which NX Units are connected or the specifications for the Slave Terminal. Refer to
Designing the Power Supply System or Wiring, which are described both in the hardware user's manual
for the CPU Unit to which NX Units are connected and user's manual for the Communications Coupler
Unit, for details on the method for supplying power to the NX Units and the wiring method.
The subsequent sections describe the applications of I/O power supply for the Analog Input Units and
Analog Output Units and supply methods, and how to calculate the total current consumption from the
I/O power supply.
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Applications of I/O Power Supply and Supply Methods

The applications of I/O power supply and supply methods for the Analog Input Units and Analog Output
Units are given as follows:
Applications of I/O Power Supply
The I/O power supply is used for the following applications.
• Driving the I/O circuits of the Analog Input Units and Analog Output Units
• Power supply for the connected external devices
I/O Power Supply Method
This power is supplied by one of the following two methods. Refer to A-1 Data Sheet on page A-2 for
the supply methods for the individual Analog Input Units and Analog Output Units.
Supply from the NX Bus
This power is supplied through the NX bus connectors by connecting an I/O power supply to the I/O
power supply terminals on the Communications Coupler Unit or Additional I/O Power Supply Unit.
For the Units to which I/O power supply is provided by a CPU Rack, refer to Designing the Power
Supply System or Wiring in the hardware user's manual for the CPU Unit to which NX Units are con-
nected.
For the Units to which I/O power supply is provided by a Slave Terminal, refer to Designing the
Power Supply System or Wiring in the user's manual for the Communications Coupler Unit to be
connected.
NX-series Analog I/O Units User's Manual for Analog Input Units and Analog Output Units (W522)
This power supply is used for operating the NX Units.
This power supply is used for driving the I/O circuits of the NX Units and for the connected
external devices.
4 Installation and Wiring
Description
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