Schlage L283-347-EU Electrically Unlocked (Fail Secure) Lock Case, For Use With L9090/92/94 Series Mortise Lock, Field Reversible

The Schlage L283-347-EU is an electrically unlocked (fail secure) lock case built to upgrade or replace the mechanism inside L9090, L9092, and L9094 Series mortise locks. In a fail secure configuration, the lock stays secured when power is lost, making it a dependable choice for openings where security must be maintained during an outage. The case is field reversible, so installers can adapt it to either door handing on site without ordering a separate part. Manufactured by Schlage to commercial-grade standards, this component delivers reliable electrified access control for institutional, commercial, and high-traffic applications where durability and consistent performance matter.

Features

• Electrically unlocked fail secure operation keeps the opening locked when power is interrupted.
• Designed as a direct lock case for L9090, L9092, and L9094 Series mortise locks.
• Field reversible design allows handing changes during installation.
• Commercial-grade construction suited for high-use environments.
• Integrates with existing Schlage L-Series mortise hardware for streamlined electrification.

Functional Details

As a fail secure (electrically unlocked) device, the lock case remains locked in the absence of power and unlocks only when voltage is applied, allowing controlled access while preserving security during power failures.