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DO terminal (fault output dry contact): The relay can be set to output fault alarms, and
user can configure it to be a normally open contact (COM＆NO) or a normally closed contact
(COM＆NC).
The relay is initially at the NC contact, and it will trip to another contact when a fault occurs.
When alarm occurs, signal status change will not be triggered.
Use LED indicators or other equipment to indicate whether the inverter is in the faulty state.
The following Figures show the typical applications of normal open contact and normaliy
closed contact:
5 Electrical Connection User Manual
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