52
When using the NPN-current-output configuration shown below, the sensor and
Input Unit should receive their power from the same supply.
+
COM
NPN current output
IN DC input
0 V
Output
7 mA
Sensor
Power
Supply
Current
regulator
+
COM
NPN open-collector output
Sensor
Power
Supply
IN DC input
0 V
Output
7 mA
+
COM
PNP current output
Sensor
Power
Supply
IN AC/DC input
0 V
Output
7 mA
0 V
The circuit below should be used for I/O devices having a voltage output.
0 V
Output
+
COM
Voltage output
Sensor
Power
Supply
IN DC input
The circuit below should NOT be used for I/O devices having a voltage output.
0 V
Output
+
COM
Voltage output
IN DC input
Sensor
Power
Supply
Standard I/O Unit Wiring Section 4-7