Mitsubishi Electric MELIPC MI5000 Series User Manual page 167

Countermeasures for electromotive force
When connecting an inductive load, connect a diode in parallel for this load.
For diodes to connect, use those that meet the following conditions.
• Reverse breakdown voltage is ten times or more than circuit voltage
• Forward current is two times or more than load current
(1)
OUT
COM
(1) Inductive load
Protection of output terminals
If the output terminal is subject to high noise, then output may turn ON because of output terminal protected operation.
Implement the following measures in order that the terminal voltage between output terminals does not exceed the used load
voltage range.
• If using relays or other inductive loads, then a surge protector ill also be required on the load side. Take into account details
of measures to handle counter electromotive force, and implement these measures.
• In order to prevent excess noise enduring, do not bundle drive wiring and I/O wiring.
APPX
165
Appendix 10 Wiring
A