Omron NX-ID - Page 124

4 Installation and Wiring
4 - 48
NX-series Digital I/O Unit User’s Manual (W521)
Use the following information for reference when selecting or connecting input devices.
z DC Input Units
The following types of DC input devices can be connected.
Wiring to the DC Input Units (When I/O Power Is Supplied from an
External Source)
DC Input Unit
Output
7 mA
0 V
+
DC Input Unit
Output
7 mA
0 V
+
Current
regulator
+
IN
COM
DC Input Unit
DC Input Unit
DC Input Unit
Output
7 mA
0 V
+
Two-wire DC output
NPN open-collector output
DC Input Unit
COM
IN
Contact output
NPN current output
PNP current output
Voltage output
• The circuit below should NOT be used for I/O devices having a voltage output.
IN
Output
0 V
+
COM
Output
0 V
+
IN
COM
DC Input Unit
+
ININ
COM
COM
IN
COM
Sensor
Power
Supply
Sensor
Power
Supply
Sensor
Power
Supply
Sensor
Power
Supply
Sensor
Power
Supply
Sensor
Power
Supply