4-3-2
Supplying Each Power Supply and Wiring
The supply method for each power supply to the NX Units is as follows.
Power supply
name
NX Unit power
supply
I/O power sup-
ply
NX-series System Units User's Manual (W523)
This power is supplied to the NX Units through the NX bus connectors by connecting a Unit
power supply to the Unit power supply terminals on the Communications Coupler Unit or Addi-
tional NX Unit Power Supply Units.
This power is supplied by one of the following two methods.
• 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 Units.
• Supply from external source
This power is supplied to the Units from an external source.
I/O power is supplied by connecting an I/O power supply to the I/O power supply terminals
on the Units.
Refer to data sheet of the user's manual for the supply methods that you will use for each NX
Unit models.
Refer to A-1 Data Sheet on page A-2 for the supply method for each System Unit model.
4 Installation and Wiring
Description
4
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