ACSI 1550K-MDV Electric Motor Latch Retraction Kit for Von Duprin 33A, 35A, 98,99

**ACSI 1550K-MDV ELECTRIC MOTOR LATCH RETRACTION MODIFICATION / KIT

for Von Duprin 33A/35A, 98/99 – OVERVIEW**

The ACSI 1550K-MDV is a high-performance electric motor latch retraction kit designed for Von Duprin 33A/35A and 98/99 Series exit devices. Part of the renowned ACSI 1550K series, this motorized solution enables simultaneous latch retraction and dogging, delivering smooth, quiet, and low-power operation for commercial and institutional doors.

Whether you’re specifying a 1550K MDV modification for new construction or retrofitting existing hardware, this kit provides UL-certified reliability with easy integration into modern access control systems. ACSI provides all modifications UL Listed, along with wiring diagrams and technical support.

Buy the ACSI 1550K-MDV Electric Motor Latch Retraction Kit for seamless compatibility with Von Duprin 33/35 and 98/99 exit devices—backed by dependable field or factory installation options.

Key Product Features:

• Simultaneous electric latch retraction and dogging (push bar depressed)

• UL Listed for both panic and fire-rated exit devices

• Compatible with mortise, rim, concealed, and surface vertical rod exit hardware

• Field or factory installed

• Quiet motor operation

• Continuous duty rated

• Low power consumption (24VDC)

• Non-polarized leads, on-board diagnostic LEDs, and automatic retry

• Interfaces with life-safety and alarm systems

• Recommended with ACSI Series 1400 power supplies

Part of the ACSI 1550K Modification Kit Collection:

• 1550K-MDV – Von Duprin 33A/35A, 98/99

• 1550K-MDV22 – Von Duprin 22

• 1550K-MDC – Corbin Russwin ED4000/5000, Yale 7000

• 1550K-MDD – Dorma 9000

• 1550K-MDT / MDS / MDP / MDF / MDO / MDH / MDX – For Hager, Sargent, Precision, Falcon, Design Hardware, Dorex

• 1550K-VD – Solenoid Latch Kit for Von Duprin 33/35, 98/99

The 1550K MDV is the go-to solution when reliable, electrified performance is needed for Von Duprin exit devices—delivering enhanced security, access control, and code compliance.

ACSI 1550K-MDV Electric Motor Latch Retraction Modification/Kit for Von Duprin 33A/35A, 98/99 Catalog