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Emergency Secure Lockdown (ESL)

The ESL allows local lockdown where access control is present on large auditorium-style rooms.


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The Von Duprin Emergency Secure Lockdown (ESL) option is ideal for high-occupancy spaces, such as auditorium-style classrooms with access control. These large spaces often don’t have a way to locally lockdown the room without tapping into the building’s access control system. ESL allows occupants to quickly secure the opening in the case of an emergency.

In the event lockdown is necessary, students or teachers can turn the thumb turn (or cylinder key) of the ESL option installed in the exit device. This action interrupts power to the QEL motor, electronically undogging, or extending the latchbolt, to secure pull side of the door; it is also equipped with functionality to alert the physical access control system. The visual indication assures the occupant the exit device has been put into secure lockdown mode. Free egress out of the room is maintained from the exit side of the door, while access into the room can only be performed with a key.

The ESL can be configured in a Von Duprin 33A/35A or 98/99 Series exit device with QEL option; or it can be ordered as a modular kit to retrofit existing QEL devices. 


  Electronic Access Control

  • Modular conversion kits allow quick and easy upgrade of existing devices
  • Lockdown solution that meets fire and life safety codes for free egress
  • Visual indicator on mechanism case cover includes a white, non-descript (blank) window for everyday use and red “LOCKDOWN,’ when activated
  • Lockdown action interrupts power and extends latchbolt to secure pull side of door as well as sends signal to access control system
  • When emergency lockdown is activated card access system no longer operates QEL
  • Physical access is obtained by key override from pull side in lockdown mode
  • Allows for scheduled electronic dog/undog or credential access during normal day-today use
  • Works with any physical access control provider, no additional integration required
  • Cylinder is required, but must be ordered separately.
  • Von Duprin devices with the ESL options maintain ANSI BHMA A156.3 Grade 1, UL305, and UL10C certifications.
  • The ESL is UL and cUL listed for use on panic exit hardware and fire exit hardware.
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Options & Accessories

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Did You Know?

Von Duprin has hundreds of possible configurations for any type of opening, giving you flexible and modular options.

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