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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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Cisco 648-247 Summary

  • Vendor: Cisco
  • Product: 648-247
  • Update on: Aug 7, 2025
  • Questions: 52
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TESTED 18 Aug 2025