Security Door Controls Blog

Electric Latch Retraction (ELR)

Since 2012, when SDC launched QuietDuo™ – the first Motorized ELR Kits to convert mechanical exit devices – we’ve been “quietly” leading in electric latch retraction (ELR) upgrades for access control. This includes retrofit solutions for most brands of exit devices, as well as innovative SDC exit devices & mortise lock-sets with factory-installed ELR and automatic door operators with a built-in 1 Amp+ power supply to power them.

With advancements in electric motor technology, the use of a motor for electric latch retraction provides lower current draw, quieter operation, and greater durability over time vs. solenoids. 

See these selected 3rd quarter highlights from our robust toolbox of over 35,000 access + egress control components...

... all designed, engineered and built in America while most of our larger competitors manufacture overseas.

This post is the third in a series to address concerns expressed on our social media platforms regarding Delayed Egress Systems that indicated misconceptions about their proper application in Security, and Fire and Life Safety applications. Here’s some information and examples of common applications of Delayed Egress Systems.

Mini Integrated Delayed Egress Locks

SDC’s 1581S series mini delayed egress locks are designed to meet the needs of long term care and commercial facilities that require a smaller, less obtrusive, and less expensive delayed egress lock that is better suited for minimum security needs.

The 1581S series delays egress through perimeter exit doors for 15 or 30 seconds, alerts security and personnel to unauthorized egress, and is compatible with access controls and patient wandering and infant tracking systems.

This post is the second in a series to address concerns expressed on our social media platforms regarding Delayed Egress Systems that indicated misconceptions about their proper application in Security, and Fire and Life Safety applications.

Recently, some readers weighed in with comments on our social media platforms regarding Delayed Egress Systems that indicated misconceptions about their proper application in Security, and Fire and Life Safety applications. This post is the first in a series to address concerns expressed and to provide clarity and resources regarding Delayed Egress systems.

Put Your Profits In The Black

See these selected 2nd quarter highlights from our robust toolbox of over 35,000 access + egress control components...

... all designed, engineered and built in America while most of our larger competitors manufacture overseas.

Designed, Engineered and Built in America - Booth #21109

ISC West attendees visited us to see why our proven Delayed Egress solutions have led the industry since 1995 with the most choices and customization available. Also, they learned why SDC has been the premier manufacturer of popular electrified access control hardware like bolt locks, strikes, EMLocks® and egress devices - all Designed, Engineered and Built in America since 1972, while most of our larger competitors manufacture overseas. Come and see for yourself before the show ends!

Proven Delayed Egress Innovation...

See why our proven Delayed Egress solutions have led the industry since 1995 with the most choices and customization available. Also, learn why SDC has been the premier manufacturer of popular electrified access control hardware like bolt locks, strikes, EMLocks® and egress devices - all Designed, Engineered and Built in America since 1972, while most of our larger competitors manufacture overseas.