Schlage ND80PDEU Rho 643E Rx Electrified Cylindrical Lock

Product Description

The SCHLAGE ND80PDEU RHO 643E RX is a Grade 1 electrified cylindrical lock configured for storeroom function, designed for commercial access control applications. It operates on 12/24 VDC and is wired fail secure, meaning the latch remains locked when power is interrupted. The unit features a 2.75 inch backset and includes Request to Exit (REX) functionality, which signals the access control system when the lever is depressed from the egress side. Installation is typically handled by licensed locksmiths, access control technicians, or commercial door hardware specialists integrating the lock into a broader security system.

This electrified cylindrical lock is suited for interior commercial doors where controlled entry with free egress is required - storerooms, server rooms, restricted corridors, and similar access-controlled openings. The Rhodes lever trim provides the hardware interface on both sides of the door. The 643E aged bronze finish coordinates with standard commercial architectural hardware. The built-in REX output simplifies integration with access control panels that require door-position or egress monitoring without a separate sensor.

Key Features

• Grade 1 heavy-duty cylindrical lock construction rated for high-cycle commercial use
• Storeroom function: outside lever always locked, inside lever always free for egress
• Fail secure operation - lock remains latched on power loss, preserving secured access
• Dual voltage 12/24 VDC input accommodates most commercial access control power supplies
• Integrated Request to Exit (REX) signal output for access control panel integration
• Rhodes lever trim in 643E aged bronze finish for consistent architectural appearance
• 2.75 inch backset fits standard commercial door prep

Compatibility

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

Installation Notes

Installation should be performed by a licensed locksmith or qualified access control technician familiar with commercial door hardware and low-voltage wiring practices. Disconnect and lock out all access control power before wiring or servicing the electrified components. Verify door prep dimensions, handing, and frame strike alignment before final installation. Local building and fire codes, including applicable IBC egress requirements, should be confirmed prior to deploying fail secure hardware on any door in an egress path.