Electric Latch Retraction (ELR) Exit Device Application

ELR Exit Device & Automatic Door Operator Configurations

Combine high-security egress with seamless automation using our Electric Latch Retraction (ELR) Exit Device Applications. This configuration is the professional choice for fire-rated doors and high-traffic corridors where durability and quiet operation are paramount. By integrating motorized or solenoid-driven latch retraction with our door operators, we provide a code-compliant solution that protects your hardware investment and ensures reliable ADA accessibility.

System Operation: 

The ELR system relies on a precise timing sequence, managed either by the operator's control board or an external power supply controller.

• • • • • • Doors with electric latch retraction exit devices are normally in a closed and latched position. 
          • Manually Depressing interior or exterior pushbutton or depressing touch pad exit will activate the exit devices, retracting the latchbolt. 
          • Operators will remain inactive for a predetermined period of time.
          • Upon expiration of the time delay, the door operator will activate. 
          • The latchbolt of the exit device will return to its normally thrown position.

System Summary

• Request for Entry/Exit: A signal is initiated via an actuator (motion sensor, push plate, or access control reader).
• Latch Retraction (Step 1): The system first sends power to the ELR exit device. The latch is pulled back into the housing (and the push bar is often retracted), clearing the strike plate.
• Operator Activation (Step 2): After a brief, adjustable delay (typically 300–500ms) to ensure the latch is fully clear, the door operator begins its opening cycle.
• Hold Open (Dwell): The door remains open for the set dwell time. Throughout this cycle, the ELR hardware remains energized to keep the latch retracted.
• Closing Cycle: Once the timer expires, the operator closes the door. As the door nears the fully closed position, power is removed from the exit device, allowing the latch to project and securely lock into the strike.
• Emergency Egress: Because this is an exit device, mechanical egress is always available. Pressing the push bar manually will retract the latch and allow the door to open, regardless of power status.