SDC Exit Check Helps Business Fight Crime

by Tim O'Leary
Created:

Security Door Controls, Model #1511S Exit Check Delayed Egress Emlock combines features of several different models and adds code compliance at a new lower price point.


In a not so unusual move, the client contacted our locksmithing business after becoming a victim. They were not sure if it was a robbery or a larceny, but they were very sure they were out $10,000. The door was unlocked to the premises, and the money was apparently taken after business hours...


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By applying a closed dry contact to the bypass terminals of the 1511S, the 1511S is unlocked and it ignores all door movement. By opening the circuit to the bypass terminals, the 1511S locks. We wired the 1511S to an external trigger, which was a SDC switchbar mounted on the door. When someone presses the bar, the 1511S sounds a warning. If the pressure on the bar exceeds the nuisance time delay, the 1511S goes into the delayed egress unlock cycle. This includes a digital readout that descends from 15 down to 0, a verbal message and alternating beeping alarm sound. Contacts are provided on the 1511S for remote alarm annunciation. At the end of the cycle, the door unlocks. The audible alarm continues to sound. The door remains unlocked until it is reset with the supplied key and key switch. If someone pulls on the door from the outside while the system is locked, the 1511S ignores it, since it is looking for a trigger from the bar only. If a valid credential is presented to either the entry or egress reader, the 1511S unlocks for the programmed time. If the door is propped open, the alarm sounds and will continue to sound until the system is reset by key.

OPERATION

When unauthorized egress is initiated, the Exit Check delays egress through the door for 15 or 30 seconds. Meanwhile, the person exiting must wait while personnel or security respond. An integral digital countdown display and voice commands inform the person intending to exit of the seconds remaining to unlock. The door unlocks after 15 or 30 seconds have elapsed, permitting egress. A signal from the fire/life safety system will release the lock for uninhibited egress in an emergency.

Exit Check applications include:

Restricting the egress of patients for their own safety.

Restricting the egress of commercial center patrons for security application needs.

1511S Operational Description (NFPA-101)

The 1511S operation complies with the following building and fire codes: NFPA 101; NFPA 1-UFC; UBC; IBC; IFC; SBC; California Building Code. Listings: UL Listed: Special Locking Arrangements and Auxiliary Locks; California State Fire Marshal (CSFM) Listed.

The door is normally closed and secured and/or latched. The Model 1511 S Exit Check secures the door in the locked condition, and the display shows the preset delay time.

Activation of the 1511 S Exit Check is made by releasing the door latch and applying up to 15 lbs. of pressure to the door or by pressing the PSB560 Sure Exit request-to-exit bar, giving a pre-activation warning tone. A one- or two-second nuisance delay will prevent false activation of the alarm. When the nuisance delay time has been exceeded, the Exit Check begins the irreversible door release cycle. At this time, the display continues to count down, the verbal warning continues and an alarm output is provided to alert personnel of an unauthorized exit.

The integral digital countdown display and voice commands inform the person intending to exit of the seconds remaining to unlock. The Exit Check will release the door after the 15- or 30-second delay cycle has expired, allowing free egress. A steady warning tone with the voice command "Exit Now" will sound until the Exit Check is reset by authorized personnel.

1511S Operational Description (BOCA/Chicago)

The 1511 S operation complies with BOCA National Building Code and the Chicago Building Code: UL Listed, Special Locking Arrangements and Auxiliary Locks. The releasing operation of the 1511 S is the same as described above, with the exception that the door relocks automatically 30 seconds after closure (reset switch not required). Each time the door is open before 30 seconds has elapsed, the relock timer resets and relocks the door in 30 seconds.

INSTALLER SELECTABLE PARAMETERS

RELEASE TIME: Release time is selectable to 15 or 30 seconds. The Nuisance Delay time period is included in the door release cycle and it will not increase or decrease the "total time to unlock" once the ExitCheck is activated.

NUISANCE DELAY: The Nuisance delay time feature, intended to avoid accidental triggering, is selectable for one or two seconds. Releasing the door latch and pushing on the door will activate the internal trigger sensor.

Activating the trigger beyond the nuisance delay time will start the irreversible Exit Delay cycle time. The Nuisance Delay time period is included in the lock release cycle and it will not increase or decrease the "total time to unlock" once the ExitCheck is activated. Releasing the door before the end of the Nuisance Delay time will turn off the warning alarm and reset the ExitCheck to secure mode.

REQUEST-TO-EXIT PERIOD: The REX time is selectable to 1, 15, 20, or 30 seconds. REX time is the period of time the lock will remain "bypassed" after a remote normally open contact switch is momentarily activated. When activated with an access control system, the REX time cycle begins immediately after the access control open time expires. The ExitCheck will automatically relock if the door is opened and then closed during the REX time cycle. The REX input may also be used to reset the lock after the Exit Delay Cycle has expired.

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