Schlage ND80LDEU Rho 643E Rx Electrified Cylindrical Lock

Product Description

The SCHLAGE ND80LDEU RHO 643E RX is a Grade 1 electrified cylindrical lock designed for storeroom function in access-controlled door applications. It operates on 12-24 volts DC and is configured as fail secure, meaning the lock remains locked when power is interrupted. The Rhodes lever handle is included, and the lock ships less cylinder, requiring a separate cylinder to be specified and installed. A 2.75-inch backset accommodates standard commercial door prep. Built to Grade 1 commercial standards, this lock suits high-traffic, security-sensitive openings where remote locking control and request-to-exit signaling are required.

This lock is suited for interior commercial doors requiring electrified access control with storeroom function, where the outside lever is always locked and only released by electrical signal or key. The request-to-exit feature provides a signal output when the inside lever is actuated, supporting integration with access control panels and alarm systems. The Aged Bronze finish coordinates with architectural hardware in commercial office, healthcare, education, and institutional environments. Installation is typically performed by a licensed locksmith or access control integrator working alongside low-voltage wiring contractors.

Key Features

• Grade 1 commercial cylindrical lock construction for high-cycle, high-security applications
• Storeroom function: outside lever locked at all times, released by electrical signal or key
• Fail secure operation: lock remains locked on power loss
• 12-24 volts DC dual-voltage compatibility simplifies integration with existing access control systems
• Request-to-exit output signals access control panel when inside lever is used
• Rhodes lever trim in Aged Bronze (643E) finish
• Ships less cylinder for field specification of preferred core type

Compatibility

Designed as an OEM-style electrified cylindrical lock replacement or new-installation solution for commercial doors prepped to standard cylindrical lock bore specifications with a 2.75-inch backset.

Installation Notes

Installation should be performed by a licensed locksmith or qualified access control integrator in coordination with a low-voltage electrician where required by local code. Disconnect and lock out all power to the access control system and door hardware circuit before beginning wiring work. The less-cylinder configuration requires a compatible cylinder to be sourced, specified, and installed separately before the lock is operational. Consult local building codes and NFPA 80 for requirements on electrified hardware installed on fire-rated door assemblies.