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4 Installation and Wiring
NX-series Digital I/O Unit User’s Manual (W521)
4-4 Wiring Examples
4
4-4-1 Wiring the Input Units
4-4 Wiring Examples
This section gives some wiring examples for the Digital I/O Units and precautions for wiring.
NPN Type Input Units
This is the wiring for contact output type external devices.
This is the wiring for two-wire sensors.
4-4-1 Wiring the Input Units
Wiring to the DC Input Units (When I/O Power Is Supplied from the
NX Bus)
IN
IOG
IOV
IOG
IOV
DC Input Unit
Communications Coupler Unit or
Additional I/O Power Supply Unit
Contact output
IN
IOG
IOV
IOG
IOV
Two-wire sensor
DC Input Unit
Communications Coupler Unit or
Additional I/O Power Supply Unit