Schlage L283-481 Eu Fail Secure Electric Lock Case Rx Sensor

Product Description

The SCHLAGE L283-481 EU is a fail-secure electrically unlocked lock case designed for use in commercial access control installations. In fail-secure operation, the lock remains locked when power is removed, maintaining door security during an outage. This lock case integrates a request-to-exit (RX) door position sensor, combining latch monitoring and egress signaling into a single mechanical assembly. It is installed by licensed locksmiths, access control technicians, or commercial door hardware specialists as part of a complete electrified mortise lockset system.

This lock case is designed for use with SCHLAGE L9090 and L9092 series mortise locksets in commercial applications. Typical installations include office suites, server rooms, stairwells, and other access-controlled openings where a fail-secure operation mode is required. The field-reversible design allows the case to be configured for both left-hand and right-hand door swings without requiring a separate SKU, simplifying inventory for service contractors and hardware distributors alike.

Key Features

• Fail-secure operation: lock remains locked on power loss, maintaining door security
• Integrated request-to-exit door position sensor for egress monitoring and access control panel signaling
• Field-reversible handing - configurable for left-hand or right-hand doors at time of installation
• Designed for use with SCHLAGE L9090 and L9092 series mortise locksets
• Electrically unlocked design: applying power releases the latch for controlled access

Compatibility

Designed for use with SCHLAGE L9090 and L9092 series mortise locksets in commercial door hardware assemblies.

Installation Notes

Installation should be performed by a licensed locksmith or qualified access control technician familiar with commercial mortise hardware. Disconnect and lock out all power to the access control system before servicing or replacing the lock case. Verify door handing before final assembly, as improper handing will prevent correct latch operation. Local building codes and fire egress requirements should be confirmed prior to specifying fail-secure hardware on any exit or egress path.