SDC 1511S

Delayed Egress Lock


Add sound to your delayed egress doors to further deter unauthorized exits! With unique voice message and digital display features, the SDC 1511S with integrated exit check announces the door’s irreversible alarm to users when egress is initiated and provides numerous field-selectable options including delayed egress timer, automatic or manual re-locking, voice message or alarm tone, door prop alarm, and more. Choose from female or more aggressive male voice for warning notifications. Single door applications only.

In stock

Your Current Selections:
  • Field-selectable voice message and alarm tone, or alarm tone only, 75 db at 3 ft
  • The visual display provides a digital countdown, indicates lock release and verifies if the door was opened for egress
  • Choice of fixed 15 second exit and 1 second nuisance delay or field-selectable 15 or 30 second exit delay and 1 or 2 second nuisance delay
  • Field-selectable security or safety message
  • Field-selectable activation:
    • Door movement (use with existing panic bar, no need for electrified panic)
    • Exit device with switch kit
    • Exit sense bar for non-latching doors
  • Field-selectable automatic or manual relock upon power up after emergency release or power loss
  • Integrated 3 position key switch provides:
    • Lock and alarm reset
    • Manual power-up
    • Sustained bypass
    • Timed bypass, adjustable. for 1, 15, 20 or 30 seconds
  • Field-selectable door prop alarm: Alarm sounds when door is left open after selected bypass time has elapsed
  • Anti-tailgate feature
  • Single or multi-door zone control and reset capability
  • A signal from the fire/life safety system will release the lock immediately for uninhibited egress in an emergency.

Control Inputs

  • Remote access control and REX input, field adjustable for 1, 15, 20 or 30 seconds
  • Remote reset input
  • Manual power-up input
  • Emergency release input
  • Anti-tailgate input

Monitoring Outputs

  • Door secure and unlocked output
  • Delayed egress activation alarm output

Patient and Infant Tracking System

The SDC Exit Check® is compatible with patient tracking systems, like those used for protection against infant abduction from hospital nurseries, and for the protection of patients in long term care facilities who may be endangered if they leave their care facility without supervision

1511S Model

For single doors equipped with:

  • Mortise or rim mount exit devices
  • Surface or concealed vertical rod exit devices with surface or concealed strikes and triggers
  • Mortise or cylindrical locksets

The 1511S is a single door application delayed egress lock. Useful for airports, public facilities, hospitals, rehab centers, and more. It’s function is to restrict or delay unauthorized egress. When an unauthorized egress is detected, egress will be delayed by a field selectable duration. This allows time for facility personnel or security to arrive. The voice alert can be set to either to a safety message suitable for medical or rehab facilities or a security message which is more aggressive. Tone alerts can replace the voice messages. There is a 1 to 2 to second nuisance timer to prevent accidentally starting the egress timer, and the lock will automatically unlock upon a fire signal or power failure.

ANSI Rating

Grade 1 (Best)


11 (L) x 2-3/4 (H) x 2-5/8 (D) in.


IBC 1008.1.8.6, IFC 1008.1.8.6, NFPA 101 Life Safety

Holding Force

1650 lbs

Input Voltage

12/24 VDC


500mA at 24VDC, 820mA at 12VDC


5 Year Manufacturer


Security Door Controls (SDC)



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