Von Duprin 040066 QEL Baseplate CONV - 3FT W/CON, Fits 4 Foot Devices, 33A/35A/98/99 Series Devices, With Connectors

The Von Duprin 040066 is the 4-foot QEL baseplate conversion kit for exit devices in the 33A, 35A, 98, and 99 Series, supplied with wiring connectors. It converts solenoid-driven Electric Latch (EL) exit devices on 48-inch door openings to Quiet Electric Latch operation, eliminating the mechanical clunk of solenoid activation in environments where operational noise is a concern. The 040066 is the direct 4-foot companion to the 040063 3-foot QEL baseplate conversion. It sits under Von Duprin Electric Kits within Von Duprin Panic Devices & Acc. under Panic Exit Devices and Exit Hardware.

What is the difference between the Von Duprin 040063 and the 040066?

The only functional difference is door width. The 040063 is sized for 3-foot (36-inch) exit devices. The 040066 is sized for 4-foot (48-inch) exit devices. Both kits serve the same 33A/35A/98/99 Series devices, both include connectors, and both perform the same EL-to-QEL baseplate conversion. Ordering the wrong size results in a baseplate that does not span the device housing correctly. Confirm the physical door width of the opening before specifying either part number. A 3-foot door takes the 040063; a 4-foot door takes the 040066.

What does the QEL baseplate conversion do on 4-foot Von Duprin exit devices?

QEL (Quiet Electric Latch) replaces the solenoid-driven latch retraction mechanism with a motor-driven system that retracts the latchbolt silently on an access-control signal. The outside credential (card reader, keypad, or REX sensor) signals the QEL motor to retract the bolt; the inside push bar always remains free for egress per life-safety code. On 4-foot devices, the 040066 baseplate spans the full 48-inch housing, replacing the existing solenoid EL baseplate as a complete assembly. Healthcare corridors, library entrances, courtrooms, and conference room vestibules on wider 4-foot door openings are the primary applications.

When does a 4-foot device need the baseplate conversion rather than the modular QEL kit?

Von Duprin's modular QEL kit handles the majority of conversion scenarios at lower cost. The 040066 baseplate kit is required specifically when the installed exit device is already a solenoid-driven EL unit. Upgrading an EL device to QEL requires replacing the entire baseplate assembly because the solenoid occupies the baseplate housing and cannot coexist with the QEL motor mechanism. If the installed device is mechanical (no electric latch at all), specify the modular QEL kit first. If it is already an EL solenoid device, the 040066 baseplate is the correct upgrade path. Confirm existing device type before ordering either kit.

Which 4-foot Von Duprin exit devices does the 040066 fit?

Compatible series: 33A, 35A, 98, and 99. The 33A and 35A are Von Duprin's aluminum-stile rim exit device families; the 98 and 99 Series are heavy-duty exit devices installed on high-traffic commercial and institutional openings. All four series share the same base plate footprint at the 4-foot size, which is why one part number covers all four. If the installed device is a 3-foot model, use the 040063 instead.

Specifications

SKU: 040066. Type: QEL Baseplate Conversion Kit. Door width: 4-foot (48-inch). Connectors: Included (W/CON). Compatible series: Von Duprin 33A, 35A, 98, 99. Application: Field upgrade from solenoid EL to Quiet Electric Latch on 4-foot exit devices. Manufacturer: Von Duprin (Allegion). Companion SKU: 040063