Omron C200HX-CPU E Series Installation Manual page 90

Wiring
Inductive Load Surge Suppressor
When an inductive load is connected to an I/O Unit, it is necessary to connect a
surge suppressor or diode in parallel with the load as shown below. This is so
that the back EMF generated by the load will be absorbed.
Contact Output Unit
Triac Output Unit
Contact Output Unit
Transistor Output Unit
Note Use surge suppressors and diodes with the following specifications.
Surge Suppressor
Resistance:
Capacitor:
Voltage:
Diode
Leading-edge peak inverse voltage:
Average rectified current:
Diode
L
COM
OUT
Surge suppressor
COM
OUT
COM
50 Ω
0.47 µF
200 V
Section 3-2
IN
DC input
L
L
+
Diode
At least 3 times load voltage
1 A
75