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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
This is the wiring for three-wire sensors.
z PNP Type Input Units
This is the wiring for contact output type external devices.
IN
IOG
IOV
IOG
IOV
0V
Output
+
Three-wire sensor
DC Input Unit
Communications Coupler Unit or
Additional I/O Power Supply Unit
IOG
IOV
IOG
IOV
IN
Contact output
DC Input Unit
Communications Coupler Unit or
Additional I/O Power Supply Unit
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