Delayed Egress Applications For Hospitals

Delayed egress locking mechanisms can provide an additional level of safety for newborn and infants in the nursery and for and patients in psychiatric wards or Alzheimer’s units.


The 1511S built-in door monitor sensor has self-adjusting ability to help prevent false triggering.

The 1511S Exit Check is designed to delay egress through exit doors for 15 or 30 seconds. Methods to monitor the door include the 1511S Exit Check’s built-in door movement sensor, a request-to-exit (REX switch) mechanism connected to an exit device and a latch monitoring strike.

For the door movement sensor and the latch monitoring mechanism, a nuisance delay sounds for a programmed one or two seconds if the force upon the door is not sufficient to activate the system. Once the 1511S Exit Check is irreversibly activated, voice and alarm tone or alarm tone only notifies of the attempted unauthorized egress. The voice provides warning or a safety message, countdown and time of door release. The annunciation continues after the countdown. The Exit Check display indicates if the door was opened after the delay time has elapsed.

This SDC delayed egress electromagnetic lock’s 1650-pound holding force requires 830mA @ 12VDC or 450mA @ 24VDC at + 10 percent. As an option, SDC offers a Energy Saver, 1200-pound holding force delayed egress electromagnetic lock requiring 400mA @ 12VDC or 275mA @ 24VDC. The alarm output is a Single Pole Double Throw (SPDT) dry relay, 1 Amp @30VDC.

The 1511S electromagnetic locks have a built in prop alarm that sounds if the door remains open after the selected bypass time has elapsed. Options include magnetic bond sensor output, door status sensor output and anti-tamper sensor output.

The appropriate signage in both English and Braille was installed onto the egress side of the door.

 

Installation

For this portion of the article, I was invited to the installation of a delayed egress exit device, an electric strike, a key switch and an electrified hinge for a stairwell opening. During the expansion of the newborn/infant section of a healthcare facility, this upper floor stairwell door was converted to a SARGENT 57-80 Series delayed action exit device to limit any unauthorized departures using the access stairway.

The 57-80 is based on the SARGENT 8800 Series rim exit device designed for doors from 32” up to 48” wide. These single point rim latching devices are ANSI A156.3 Grade 1 UL Fire and Panic Listed. The device is equipped with a ¾” stainless steel throw latch.

To power the delayed action function of the 57-80, .25 Amps @ 24VDC of filtered and regulated power is required. A mortise lock cylinder controls the electronics within rail assembly with green and red LEDs indicating status. An 80dB horn provides the alarm when the delay is activated. Installing the delayed egress mechanism requires up to eight wires.

The HES 9500 Series Genesis™ is a three hour fire rated electric strike that accommodates up to a 3/4” throw Pullman latch rim exit device. The non-handed surface-mount exit device has a 3/4” thick stainless steel housing requiring no cutting of the frame. The Genesis power draw for a 12VDC continuous duty application is .45 Amps @ 12VDC or .25 Amps @ 24VDC. The HES 9500 Series electric strike complies with NFPA 80-07 guidelines for retrofit into fire-rated frames.

The SARGENT 57-80 installs into the same mounting holes as the exit device and can be used with the same exterior trim. Wire runs were provided to the key switch and wire transfer butt hinge by the facility electricians. Make sure there is sufficient wire to not only make connections, but to install the “Insert Mechanism” onto the rail.

There are three electrical connectors for the SARGENT Delayed Egress Exit Device. The smaller block connector provides power to the device. Connect the other two connectors first, then the power connector. When initially powered, the alarm sounds for about one second, which feels a lot longer knowing personnel, patients and relations will hear the alarm sound. The green LED illuminates, indicating the system is operational. The system was tested using the locksmith’s badge and the card reader on both the egress and access side of the opening.

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