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When a 24 VDC fail safe lock is being used to secure a door, how...

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When a 24 VDC fail safe lock is being used to secure a door, how should power be supplied to the lock from the control source?

A.

connected +24 VDC directly to the lock

B.

connected +24 VDC through common and normally close

C.

connected +24 VDC through common and normally open

D.

connected +5 VDC binary control signaling

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A deployment uses the same template for 100 doors.
Refer to the exhibit.
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