Sargent 8272 LNL US26D Electric Mortise Lockset - Fail Safe, Locks Both Levers

The Sargent 8272 LNL is an industrial-grade Grade 1 Heavy-Duty Electrified Mortise Lockset designed for high-security areas that require comprehensive access control on both sides of the opening. Built on the legendary Sargent 8200 Series chassis, this electrified solution provides the ultimate combination of physical strength and electronic versatility. The 8272 Fail Safe Function is specifically engineered for life-safety applications in sensitive zones, ensuring that both the interior and exterior levers unlock automatically during a power failure or fire alarm activation to allow unhindered movement for emergency responders and staff.

Comprehensive Electrified Control (72 Function - Fail Safe)

The 8272 function operates on a "Power-to-Lock" logic for both sides of the door. This is a specialized configuration often required in high-security healthcare, research, or institutional environments where bidirectional traffic control is necessary.

• Fail Safe Logic (Power ON, Locks Both Levers): When power is applied, both the exterior and interior levers are locked. When power is removed (manually, via a fire alarm, or during a power outage), both levers are instantly unlocked.
• Mechanical Key Override: Regardless of power status, a physical key in the Sargent LA Keyway always retracts the latchbolt from the exterior, providing a reliable mechanical backup for authorized personnel.
• Universal Voltage: The high-efficiency solenoid is designed to operate on either 12VDC or 24VDC, offering maximum flexibility for diverse security power supplies.
  
• Auxiliary Deadlatch: Features a stainless steel deadlatch that prevents "shimming" or unauthorized manipulation of the latchbolt when the door is closed.
  

Architectural LNL Trim & US26D Finish

The LNL trim configuration combines the high-strength LN Escutcheon with the ergonomic L Lever, finished in a professional US26D Satin Chrome.

• LN Escutcheon Plate: A heavy-duty wrought metal escutcheon that reinforces the door and protects the internal electrified components.
• L Lever Design: A sleek, modern profile that is fully ADA compliant, ensuring easy operation for staff and authorized users.
• Extreme Durability: Independently verified to withstand over 14 million cycles—14 times the requirement for Grade 1 certification—ensuring the lowest total cost of ownership in high-traffic commercial environments.
  

Critical Installation Component: The QC8 Hinge

To ensure the long-term reliability and performance of your electrified opening, it is recommended to use a QC8 Hinge with the Sargent 8272 LNL lockset.

• QC8 ElectroLynx® Integration: The McKinney QC8 Hinge features an 8-pin connector that provides a seamless, concealed power transfer from the door frame to the lockset.
  
• Plug-and-Play Reliability: Utilizing the QC8 hinge eliminates the need for field-soldering, significantly reducing installation time and the potential for wiring failures.
• Wire Protection: Unlike surface-mounted door cords, the QC8 hinge protects the 8-wire harness within the hinge itself, preventing wire fatigue and pinching during high-frequency door cycles.

Key Product Features

• ANSI/BHMA Grade 1 Certified: The highest mechanical rating for commercial hardware durability and security.
• Electrified Fail Safe (F72): Remotely controlled bidirectional access that defaults to "unlocked" during power loss.
  
• Low Power Consumption: Optimized solenoid design draws minimal current, allowing for more locks per power supply.
  
• UL/cUL Listed: Rated for use on 3-hour fire-rated doors, maintaining strict fire barrier integrity.
• Vandal-Resistant Chassis: Constructed with a 12-gauge heavy-duty wrought steel lock case that is zinc dichromate plated.

Technical Specifications

Ordering & Installation Information

The Sargent 8272 LNL is designed for precision integration into electronic access control systems. For new construction or retrofits, ensure the door is pre-drilled for ElectroLynx® wiring to take advantage of the QC8 8-pin system. This hardware is fully compatible with Sargent High-Security Key Systems, including Degree® and Signature.

Ideal Applications

• Secure Healthcare Wards: Controlling bidirectional movement of staff and patients.
• Research Laboratories: Maintaining strict entry and exit protocols with electronic scheduling.
• Stairwell Doors: Meeting fire codes that require doors to unlock upon fire alarm activation for re-entry.
• High-Security Government Suites: Integrating with dual card readers for bidirectional access control.