A Complete, Integrated ELR Ecosystem

For more than a decade, Security Door Controls (SDC) has quietly but consistently led the evolution of electric latch retraction technology. Since introducing QuietDuo™ in 2012—the industry’s first motorized ELR kits for converting mechanical exit devices—SDC has earned the position of true category leader. Today, SDC delivers the industry’s most complete lineup of motorized ELR solutions, engineered for new construction, modernization, and retrofit applications alike.

Motorized ELR: Quiet, Efficient & Built to Last

All SDC ELR solutions—whether retrofit kits, exit devices, mortise locksets, or factory-installed ELR—share the same core advantage:

Motorized technology, not solenoids.

This means:

• Lower current draw, enabling direct power from SDC AUTO Series operators

• Exceptionally quiet operation

• Greater durability and reduced heat generation

• Reliable latch retraction and dogging

Because motorized ELR requires a fraction of the power of solenoid systems, SDC engineered the AUTO Series Low Energy Operators with a built-in 1 Amp+ power supply—more than enough to power SDC ELR products without additional hardware costs.

Retrofit ELR That Installs Fast — Without Replacing Exit Devices

SDC’s LR100 Series Retrofit Kits continue to set the standard for cost-effective modernization. These kits allow integrators to electrify most major exit device brands while avoiding the purchase of new panic hardware. Installers benefit from reduced labor time, and building owners save significantly—especially on large multi-door projects.

For select exit devices, installation can even be performed without removing the device from the door, further reducing time on site.

Future-Ready ELR for Every Door

Beyond retrofit kits, SDC’s factory-installed ELR options on SDC exit devices and mortise locksets make SDC the only manufacturer to deliver a complete, motorized, integrated ELR ecosystem - especially when powered by SDC's AUTO Series Low Energy Operators with built-in1Amp+ power supply.

In a market where reliability, simplicity, and code-compliance are mission critical, SDC’s ELR platform ensures long-term performance across high-traffic, access-controlled openings.

The Lock Behind the System™

For access control professionals, SDC remains the trusted partner powering safer, more accessible environments. As the leaders in latch retraction, SDC continues to enhance the way doors operate—quietly, efficiently, and with uncompromising reliability.