6 Installation
6 - 28
NX-series EtherNet/IP Coupler Unit User’s Manual (W536)
• Keep the wiring between the transformer and the EtherNet/IP Slave Terminal as short as possible,
twist the wires well, and keep the wiring separate from high-voltage and power lines.
Supplying I/O Power from the NX Bus
Supplying I/O Power from External Sources
Observe the following points when wiring external I/O signal lines.
• To absorb reverse electromotive force when an inductive load is connected to an output signal, con-
nect a surge suppressor near the inductive load in an AC circuit, or connect a diode near the induc-
tive load in a DC circuit.
Wiring External I/O Signal Lines
Unit power supply for EtherNet/IP Slave Terminal
I/O power supply for EtherNet/IP Slave Terminal
Power Supply System Diagram
Power circuits
Noise
filter
Power supply for general operations circuits
Outlet (for peripheral devices)
Unit power supply for EtherNet/IP Slave Terminal
Power supply for output circuits of EtherNet/IP Slave Terminal
Power supply for input circuits of EtherNet/IP Slave Terminal
Power Supply System Diagram
Power circuits
Noise
filter
Power supply for general operations circuits
Outlet (for peripheral devices)
Input Signal Noise Countermeasures
DC
Input
Unit
Inductive
load
Diode
Connect a diode in a DC circuit.
Output Signal Noise Countermeasures
Output
Unit
Output
Unit
Connect a diode
in a DC circuit.
Connect a surge
suppressor in an AC circuit.
Inductive
load
Diode
Inductive
load
Surge
suppressor