4 Installation and Wiring
4 - 42
NX-series Digital I/O Unit User’s Manual (W521)
This is the wiring for two-wire sensors.
This is the wiring for three-wire sensors.
IOG
IOV
IOG
IOV
IN
Two-wire sensor
DC Input Unit
Communications Coupler Unit or
Additional I/O Power Supply Unit
IOG
IOV
IOG
IOV
IN
Three-wire sensor
0V
+
Output
DC Input Unit
Communications Coupler Unit or
Additional I/O Power Supply Unit
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