Omron NX Series Hardware User Manual

• Use an isolating transformer to significantly reduce noise between the Controller and the ground. In-
stall the isolating transformer between the Controller power supply and the noise filter, and do not
ground the secondary coil of the transformer
.
• Keep the wiring between the transformer and the Controller as short as possible, twist the wires
well, and keep the wiring separate from high-voltage and power lines.
Unit power supply for Controller
I/O power supply for Controller
Power Supply Sy
stem Diagram
Power circuits
Power supply for general operations circuits
Outlet (for peripheral devices)
I/O power supply for Controller
Noise
filter
Wiring External I/O Signal Lines
Observe the following points when wiring external I/O signal lines.
• T
o 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.
Inductive
load
Diode
DC
Input
Unit
Output
Unit
Inductive
load
Surge
suppressor
Output
Unit
Diode
Input Signal Noise Countermeasures Output Signal Noise Countermeasures
Connect a diode in a DC circuit. Connect a surge suppressor
in an AC circuit.
Connect a diode in a DC circuit.
Inductive
load
• Never bundle output signal lines with high-voltage or power lines, and do not route them in close
proximity or parallel to such lines.
If output signal lines must be routed in close proximity to such lines, place them in separate ducts or
conduits. Be sure to ground the ducts or conduits.
I/O Cable Arrangement
Floor ducts ConduitsSuspended ducts
I/O cables
I/O cables
Power lines
Power
lines
I/O cables
Power lines
5 Installation and Wiring
5-61
NX-series NX502 CPU Unit Hardware User's Manual (W629)
5-5 Control Panel Installation
5
5-5-5 Electrical Environment

Omron NX Series Specifications

General

Brand	Omron
Model	NX Series
Category	Controller
Language	English