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Serrure électrique à verrouillage 12V à faille sécurisée NC cathode pour contrôle d'accès porte en bois et métal
41,98€ 43,80€

Q: What does "Fail Safe NC" mean? I understand that NC means "normally closed" but I thought failsafe for these locks means that they are open without current. So are they open or closed when there is no power?

demandé par VolkerP sur 2018-01-01 13:33:46

JoeC it is normally closed which means it is always getting power to stay locked when the power goes out it becomes n/o which is an open circuit and it is unlocked

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