Sentry E. Labs Fail-Secure Electric Drop Bolt Lock (EB-260)

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The fail-secure lock stand alone lock system because it has a built in lock release delay (typically locks need their release time to be controlled by the activating device or a relay). Acts as a dead bolt on side of door or top and bottom latch on double doors.

Lock can be powered by 12VDC - 28VDC

Lock releases by a normally open dry contact. This could be any:

  • Keypad
  • Proximity card reader
  • Push button
  • Hand sensor
  • GSM intercom
  • GSM receiver
  • Micro-Switch Panic Exit Bar
  • Switched handle
  • Fire release
  • Automatic Door Opener
  • As many of these drop bolt lock devices can be used as desired to complete the system and no additional control units are needed in-between these activation devices and the lock. Multiple numbers of these locks can be activated simultaneously by the above controls.

    Fail-Secure design. It is power to unlock. This means in absence of power the bolt will be locked. A key release can be added, utilizes EURO CYLINDER for key release. The lock unlocks when power is applied

    The functionality of this electric drop bolt lock is as follows: The power supply is on standby for the lock. When a device uses a dry contact Normally Open relay (device like keypad or button) to connect the two trigger wires of the lock the power supply is allowed to complete the circuit to the lock for the amount of time set on the lock (1.5, 3, 6, or 9 seconds). This is the amount of time the person has to pull the door open before the bolt automatically locks again. Once the door is pulled away from the frame a sensor inside the lock is no longer being triggered by the magnet built into the door jamb strike plate. This will then override the lock’s preset unlock time and keep the lock connected to the power supply, indefinitely releasing the lock, until the door is closed the magnet in the door frame is realigned with the lock sensor. The lock bolt will then be released and lock the door again.


  • Lock height: 10 1/4 inches
  • Lock width: 1 1/8 inches
  • Lock depth inside door: 1 7/8 inches
  • Door jamb strike plate height: 3 15/16 inches
  • Door jamb strike plate width: 1 inch
  • Door jamb strike plate depth inside door: 3/4 inch

  • Manual: sentry e labs EB 260
    QB ID: EB-260

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