I/O Unit Wiring - Omron CQM1H - 08-2005 Operation Manual

Wiring and Connections
4-7-3

I/O Unit Wiring

Input Devices
Device
Contact output
NPN open collector
NPN current output
circuit
PNP current output
Voltage output
When connecting an external device with a DC output to a DC Input Unit, wire
the device as shown in the following table.
Relay
Sensor
+
Sensor power
supply
Output
0 V
Constant current
+
Output
Sensor power
0 V
supply
+
Sensor power
supply
Output
0 V
Output
0 V
Sensor power
supply
Circuit Diagram
IN
COM(+)
IN
COM(+)
Use the same power supply for
the input and sensor.
IN
+
COM(+)
IN
COM(–)
COM (+)
IN
Section 4-7
121