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4 Installation and Wiring
NX-series Digital I/O Unit User’s Manual (W521)
4-2 Wiring the Power Supply to the Slave Terminal
4
4-2-2 Supplying Each Power Supply and Wiring
The supply method for each power supply to the NX Units is as follows.
4-2-2 Supplying Each Power Supply and Wiring
Power supply name Description
NX Unit power sup-
ply
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 Additional NX Unit Power Supply Units.
I/O power supply This power is supplied by one of the following two methods.
Refer to A-1 Data Sheet on page A-2 for the supply method of each NX Unit.
• 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 Addi-
tional 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 termi-
nals on the Units.
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