RCI DE8310CV Provides Retrofit Delayed Egress Solution

Delayed egress lock mechanisms provide a time delay before an outswinging door can be opened for egress. This gives employees, medical personnel, etc., precious seconds to stop an unauthorized person from leaving the unit or building. Delayed egress locks are installed into Alzheimer and psychiatric wards to protect the patients or for loss prevention where someone with something in their possession that they do not own is trying to leave.

NFPA 101 2009 Version Section 7.2.1.6 Special Locking Arrangements.  Section 7.2.1.6.1 Delayed-Egress Locking Systems:

7.2.1.6.1.1 Approved, listed, delayed-egress locking systems shall be permitted to be installed on door assemblies serving low and ordinary hazard contents in buildings protected throughout by an approved, supervised automatic fire detection system.

In simplified language, the building owner or agent will be able to determine if the building meets the code requirements.

An irreversible process shall release the lock in the direction of egress within 15 seconds, or 30 seconds where approved by the authority having jurisdiction, upon application of a force to the release device required in 7.2.1.5.10 under all of the following conditions:

(a) The force shall not be required to exceed 15lbf (67N).

(b) The force shall not be required to be continuously applied for more than 3 seconds. Varies by local and AHJ.

(c) The initiation of the release process shall activate an audible signal in the vicinity of the door opening.

(d) Once the lock has been released by the application of force to the releasing device, relocking shall be by manual means only.

Simplified, delayed egress locks have these features built in to meet the code requirements.

Delayed egress locks are available as electromagnetic locks and as exit devices. A delayed egress electromagnetic lock is a surface-mounted lock with no moving parts and delayed egress components. A delayed egress electromagnetic lock does not require replacing existing door hardware in order to have this additional level of security.

Electromagnetic locks require power to maintain the locked condition (Fail Safe), as there are no mechanisms that interlock between the door and jamb. When power is removed, the electromagnetic lock can no longer keep the door locked.

The components of a delayed egress electromagnetic lock create the delay between a person's attempt to exit and their ability to exit once the door has been released. In this type of electromagnetic lock, a switch triggers a time delay during the course of an exit attempt. A delayed egress electromagnetic lock’s initiation is door movement.

When 15 pounds or less pressure has been exerted against the door, a temporary warning (or voice message) sounds. After continuous pressure being exerted against the door for up to three seconds, a switch starts an irrevocable timing sequence. The remote alarm (or voice messages) activates for usually 12 seconds (or 27 seconds where 30 seconds is approved by the Authority Having Jurisdiction). The time delay is the three-second nuisance delay plus the time delay. Once the time delay has elapsed, power is automatically removed from the electromagnetic lock in order to unlock the door, permitting egress. The alarm (or voice message) continues and the door remains unlocked until it is manually reset.

In order to release the door when locked without activating the delay and alarm, an electromagnetic lock requires additional device(s) to remove power. These can include key switch, timer, motion detector and alarm panel contact. Specific devices are determined by code, local supplements and the AHJ.

To identify a door equipped with a delayed egress lock, a readily visible, durable sign in letters not less than one inch high and not less than 1/8 inch in stroke width on a contrasting background that reads as follows shall be located on the door leaf adjacent to the release device:

PUSH UNTIL ALARM SOUNDS. DOOR CAN BE OPENED IN 15 (30) SECONDS.

NOTE: All delayed egress lock installations must be approved by the local Authority Having Jurisdiction (AHJ) prior to installation.

RCI DE8310 Series

Rutherford Controls International, a DORMA Group Company, offers the RCI DE8310 Series of Delayed Egress Electromagnetic Lock. This patent pending UL Listed electromagnetic lock can be installed on a door making use of the existing door hardware. There is no need to replace existing door hardware, providing an easy and affordable delayed egress solution. These delayed egress electromagnetic locks are activated by exerting pressure of 15 pounds of less on the door.

The DE8310 Series Delayed Egress Electromagnetic Locks holding force is up to 1200 pounds. Auto sensing voltage requirements range from 12 to 24 VDC. A built-in Security Condition Sensor (SCS) indicates when the door is closed and magnet is bonded to the armature. A “Red/Green” light panel in the rear of the device indicates the status of door.

DE8310 Series locks have field selectable 15 or 30 seconds total time release delay with a nuisance delay of 0 to 3 seconds (IBC has a one second delay). One Single Pole Double Throw (SPDT) and one Double Pole Double Throw (DPDT) outputs are provided for local and remote alarms. These two dry contact relays are rated at 1.0A @ 120VAC/2A @ 30VDC.

The DE8310 Series includes the following five models.

• DE8310 Delayed Egress with external sounder
• DE8310S Delayed egress with built-in sounder
• DE8310V Delayed egress with built-in voice
• DE8310CS Delayed egress with built-in camera and built-in sounder
• DE8310CV Delayed egress with built-in camera and built-in voice.

For this article, we decided to discuss the DE8310CV model with voice module and CCTV monitoring functionality. The power draw of the DE8310CV is 0.79Amps @ 12VDC and 0.39Amps @ 24VDC. RCI recommends using a power supply that provides filtered and regulated 12 or 24 VDC. The DE8310CV includes an RCI 960 keyswitch for reset and override.

Important: Locating the keyswitch between the main wire harness (HD3) and the override wire harness (HD4) on the DE8310CV main circuit board allows a seven second authorized override and the code required manual means reset.

The DE8310CV lock is equipped with voice response in place of an alarm, which accommodates NFPA 101. The 2012 edition discussing Delayed Egress requires an audible signal in vicinity of the door opening for a delayed egress lock. Available languages include English, French and Spanish. The testing laboratories preauthorized the language for the four pre-recorded messages that indicate the exit status of the door.

The messages are:

When pressure is first exerted on the door, the message is “Unauthorized personnel prohibited.”

When the countdown begins, the message is “The emergency system has been activated. The door will unlock in a moment.” This message repeats for the 12 seconds (minus the 3 second nuisance delay).

“The door is now unlocked, please exit.” This message repeats until the lock is reset.

The following message sounds if door is physically forced open before the release delay has lapsed is “Unauthorized access. Security personnel have been alerted and will arrive momentarily.”

The camera module provides a continuous analog video signal to a video recorder or compatible video monitoring surveillance software. The DE8310CV camera module output is NTSC (National Television System Committee), which is the United States analog standard. The video signal is continuous output once the unit has been powered. The camera module has BNC and RCA video outputs. The video recorder or the software controls when to record.

Installation

Installing the DE8310 Delayed Egress Electromagnetic Lock follows the same procedures as installing an electromagnetic lock. The lock is installed onto the doorjamb. Depending upon the configuration, additional brackets, filler bars or spacers may be required to insure the delayed egress lock is solidly mounted. The armature is installed onto the interior side face of the door.

Note: It is recommended that thread locking adhesive be applied to the mounting screws.

The DE8310CV uses a special mounting bracket to simplify installation. The mounting bracket is removed from the lock and installed onto the underside of the header or bracket. After the wiring has been run through the lock's wiring access compartment, the lock is positioned onto the mounting bracket and the four Allen Head Screws within the body of the lock are threaded into place. RCI provides leads for making the wiring connections.

The final steps are to set the DIP Switches for the delays. Switches two and three are for the nuisance delay. Switch one if the release delay, and switch four is for the BOCA relock switch.

The use of a delayed egress lock has specific applications for loss prevention and life protection. The ability to install this type of lock mechanism provides our customers with products that have a higher level of security.

The Rutherford Controls DE8310CV comes with a five-year warranty on the electromagnetic lock. There is a one year warranty on the camera and built-in voice components.

For more information, contact your local locksmith distributor or Rutherford Controls Int'l ., Telephone:  800-265-6630. Web Site: www.rutherfordcontrols.com.