Delayed Egress Maglock Claims to Save Thousands

By Brian Rhodes, Published on Jan 21, 2014

Deploying delayed egress right is tricky even when codes allow it, and making sure you meet all the rules requires carefully picking product. Areas like California and Chicago have stringent rules when using delayed egress, because if employed improperly deaths or injury can result. A maglock from Securitron claims to solve those code pitfalls at the factory, and do it in a single device for thousands less than most delayed egress solutions. In this note, we examine the iMXDa Maglock, how it aims to meet code, and its cost compared to other solutions. 

Delayed Egress Problem

As noted in our Delay Egress tutorial, this is used to keep people in an area for a short period before allowing passage. In most jurisdictions, this period is not permitted to be longer than 15 seconds. If someone needs to escape an area, they must delay for this period as it counts down. 

This control technique is useful in nursing homes, infant nurseries, or retail, where undelayed egress through emergencies exits can result in loss, theft, or lack of facility control. However, its use is not always permitted due to fears it may trap people inside buildings. This means that use of delayed egress is highly conditional and regulated, with several large jurisdictions permitting it only when certain conditions have been met. In the US, California [link no longer available] and Chicago are large markets with highly restricted use of Delayed Egress.

Securitron iMXDa Overview

Rather than a kit composed of an exit device, countdown timer, alarm siren, or other multiple hardware pieces, the iMXDa is a single conventional sized maglockThe lock itself measures ~12"X3"X2", and is small enough to mount on a single door equipped with a closer without installation interference. The hold force is rated to 1200 pounds, and is dual voltage (12/24VDC).

Other details include:

  • Cost: The unit has a street price of ~$600, moderately higher than a typical maglock, but thousands less than a retrofit exit-device solution.
  • Bond Sensor: The lock includes outputs that verify the magnet is holding the armature locked, not merely the door is shut.
  • Indoor Only: The iMXDa is not weathertight nor is rated for temperatures in outdoor use.
  • Audible Siren: The lock contains an internal piezo style horn to alarm when exit, tamper, or relock periods are in effect.
  • UL Listed: The unit is approved where rated door hardware is specified.

Delayed Egress Operation

The unit is built with a door position sensor and a springloaded armature that detects 'pressure' when the door is pushed while locked. The amount of gap the door can travel before alarming is adjustable, between 1/8" and 1". Unlike standard maglocks that do not allow any movement between the magnet box and armature, the iMXDa features a floating design. The image below shows this detail:

Get Notified of Video Surveillance Breaking News
Get Notified of Video Surveillance Breaking News

In order to release the maglock, the door only needs an open attempt. Depending on configuration, up to 2 seconds might need to expire before the 'delayed countdown begins - this is called the 'nuisance delay' to frustrate tampering or 'pranking' the door. The internal alarm begins to sound, drawing attention to the opening attempt. Once the delay period expires, the magnet automatically releases and allows unrestricted egress.

Code Compliant

The unit is field programmable, using dip switches for a number of variables. However, some of the local codes include 'shall' and 'must' language that requires unit settings be fixed to certain points with no potential for adjustment. For California and Chicago, two variants are available with performance 'factory fixed' according to the matrix below:

The number of other configurable functions means the default unit can be tweaked to customer's liking in the field. For example, if the customer found a two second nuisance period was more suitable for an area securing children, the unit could be switched. Unless the attribute is 'factory fixed', it has the option to be changed subject to local codes or use.

Normal Maglock 

Aside from delayed egress function, the iMXDa can be used as a traditional maglock, connected in standard fashion to electronic access control systems, RTE devices, and fire alarm systems.

Cost Comparison

The maglock is less expensive to purchase and install than a traditional exit device delayed egress solution, like this ~$1300 example from Detex.

However, other 'smart maglock' products, like the SDC 'Exit Check' series are available for ~$600, although their acceptance by some AHJs in strict areas may not be approved because variables like 'Delayed Egress' interval, nuisance delays, and relock time are all subject to improper configuration. 

1 report cite this report:

Delayed Egress Access Control Tutorial on Feb 04, 2020
Delayed Egress marks one of the few times locking people into a building is...
Comments (1) : Members only. Login. or Join.

Related Reports

Delayed Egress Access Control Tutorial on Feb 04, 2020
Delayed Egress marks one of the few times locking people into a building is...
Breaking Into A Facility Using Canned Air Tested on Jan 28, 2020
Access control is supposed to make doors more secure, but a $5 can of...
Exit Devices For Access Control Tutorial on Aug 25, 2020
Exit Devices, also called 'Panic Bars' or 'Crash Bars' are required by safety...
Vehicle Gate Access Control Guide on Mar 19, 2020
Vehicle gate access control demands integrating various systems to keep...
Drain Wire For Access Control Reader Tutorial on Sep 23, 2020
An easy-to-miss cabling specification plays a key role in access control, yet...
Multipoint Door Lock Tutorial on Jan 23, 2020
Despite widespread use, locked doors are notoriously weak at stopping entry,...
Door Fundamentals For Access Control Guide on Aug 24, 2020
Doors vary greatly in how difficult and costly it is to add electronic access...
AHJ / Authority Having Jurisdiction Tutorial on Aug 06, 2020
One of the most powerful yet often underappreciated characters in all...
"Severely Impacted" Mercury Security 2020 Leap Year Firmware Issue on Jan 17, 2020
One of the largest access controller manufacturers has a big problem:...
Access Control ADA and Disability Laws Tutorial on Feb 17, 2020
Safe access control is paramount, especially for those with...
Free Online NFPA, IBC, and ADA Codes and Standards 2020 on Sep 03, 2020
Finding applicable codes for security work can be a costly task, with printed...
Access Control Levels and Schedules Tutorial on Sep 29, 2020
Configuring access levels and setting up schedules is central to maintaining...
Help Security End Users Facing Coronavirus Improve Remote Access on Mar 24, 2020
Many end-users and integrators are struggling with the impact of coronavirus...
Glass Doors and Access Control Tutorial on Nov 21, 2019
One of the biggest access challenges are locking and securing glass...
Access Credential Form Factor Tutorial on Feb 10, 2020
Deciding which access control credential to use and distribute, including...

Recent Reports

ISC Brasil Digital Experience 2020 Report on Oct 23, 2020
ISC Brasil 2020 rebranded itself to ISC Digital Experience and, like its...
Top Video Surveillance Service Call Problems 2020 on Oct 23, 2020
3 primary and 4 secondary issues stood out as causing the most problems when...
GDPR Impact On Temperature / Fever Screening Explained on Oct 22, 2020
What impact does GDPR have on temperature screening? Do you risk a GDPR fine...
Security And Safety Things (S&ST) Tested on Oct 22, 2020
S&ST, a Bosch spinout, is spending tens of millions of dollars aiming to...
Nokia Fever Screening Claims To "Advance Fight Against COVID-19" on Oct 22, 2020
First IBM, then briefly Clorox, and now Nokia becomes the latest Fortune 500...
Deceptive Meridian Temperature Tablets Endanger Public Safety on Oct 21, 2020
IPVM's testing of and investigation into Meridian Kiosk's temperature...
Honeywell 30 Series and Vivotek NVRs Tested on Oct 21, 2020
The NDAA ban has driven many users to look for low-cost NVRs not made by...
Ubiquiti Access Control Tested on Oct 21, 2020
Ubiquiti has become one of the most widely used wireless and switch providers...
Avigilon Aggressive Trade-In Program Takes Aim At Competitors on Oct 20, 2020
Avigilon has launched one of the most aggressive trade-in programs the video...
Mexico Video Surveillance Market Overview 2020 on Oct 20, 2020
Despite being neighbors, there are key differences between the U.S. and...
Dahua Revenue Grows But Profits Down, Cause Unclear on Oct 20, 2020
While Dahua's overall revenue was up more than 12% in Q3 2020, a significant...
Illegal Hikvision Fever Screening Touted In Australia, Government Investigating, Temperature References Deleted on Oct 20, 2020
The Australian government told IPVM that they are investigating a Hikvision...
Panasonic Presents i-PRO Cameras and Video Analytics on Oct 19, 2020
Panasonic i-PRO presented its X-Series cameras and AI video analytics at the...
Augmented Reality (AR) Cameras From Hikvision and Dahua Examined on Oct 19, 2020
Hikvision, Dahua, and other China companies are marketing augmented reality...
18 TB Video Surveillance Drives (WD and Seagate) on Oct 19, 2020
Both Seagate and Western Digital recently announced 18TB hard drives...