Yaskawa MP2000 Series I/O Module User Manual - Manual (Page 78)

3.2 Specifications of LIO-04/LIO-05 Module Connections
3.2.5 LIO-04 Module Connections
78
ΠIf you connect an inductive load, connect a diode parallel to the load to
absorb counter electromotive force.
ΠBackward voltage: 10 times the load voltage or greater
ΠForward current: Load current or greater
OUT
diode
Source circuit
–
+
COM
Inductive
load