Omron NX-EC0222 User Manual

4 Installation and Wiring
4 - 8
NX-series Position Interface Units User’s Manual (W524)
4-2 Connecting the Power Supply and
Ground Wires
This section provides information on wiring the power supplies for Position Interface Units.
There are the following two types of power supplies that supply power to the Position Interface Units.
Precautions for Correct Use
Always use separate power supplies for the Unit power supply and the I/O power supply. If you
supply power from the same power supply, noise may cause malfunctions.
The following table describes how each power supply provides power to the Position Interface Units.
4-2-1 Power Supply Types
Power supply
name
Description
Unit power sup-
ply
This power supply is required to generate the NX Unit power supply, which is necessary for the
Slave Terminal to operate.
This power supply is connected to the Unit power supply terminals on the Communications
Coupler Unit or Additional NX Unit Power Supply Unit.
The internal circuits of the Communications Coupler Unit and Position Interface Units operate
on the power from the NX Unit power supply.
The NX Unit power is supplied to the Position Interface Units in the Slave Terminal through the
NX bus connectors.
I/O power sup-
ply
This power supply provides power to drive the I/O circuits of the Position Interface Units and it
provides power to external devices.
This power supply is connected to the I/O power supply terminals on the Communications Cou-
pler Unit or Additional I/O Power Supply Unit.
The I/O power supply provides power for connected external devices, such as external encod-
ers or external sensors.
The I/O power is supplied to the NX Units from the I/O power supply terminals and through the
NX bus connectors.
4-2-2 Power Supply Methods and Wiring
Power supply
name
Description
NX Unit power
supply
Power is supplied to the Position Interface Unit through the NX bus connectors by connecting
a Unit power supply to the Unit power supply terminals on the Communications Coupler Unit
or Additional NX Unit Power Supply Unit.
I/O power supply Power is supplied to the Position Interface Unit 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 an Additional I/O Power Supply Unit.

Omron NX-EC0222 Specifications

General

Brand	Omron
Model	NX-EC0222
Category	Controller
Language	English