ACSI 1550K-MDH Electric Motor ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$770.00
$455.99
ACSI ACSI 1550K-MDH Electric Motor Latch Retraction Modification/Kit for Design Hardware 1000 1550K-MDH

ACSI 1550K-MDH Electric Motor Latch Retraction Modification/Kit for Design Hardware 1000

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Model: 1550K-MDH
From the 1500 Series Collection

In Stock (leaves warehouse same day if ordered before 3pm ET)

$770.00
$455.99
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ACSI 1550K-MDH ELECTRIC MOTOR LATCH RETRACTION MODIFICATION/KIT FOR DESIGN HARDWARE 1000 OVERVIEW

  • 1550K-MDH Electric Motor Latch Retraction Modification/Kit for Design Hardware 1000. Motorized Latch Retraction/Dogging Kits for Design Hardware 1000 Series Exit Devices.
  • You supply the exit device and ACSI supplies high quality UL Listed modifications to a wide range of manufacturers’ exit devices. ACSI engineers and technicians are available to provide system design, wiring diagrams, and a variety of technical services.
  • Buy the ACSI 1550K-MDH Electric Motor Latch Retraction Modification/Kit for Design Hardware 1000 for easy installation and dependable door hardware solution.

ACSI 1550K-MDH ELECTRIC MOTOR LATCH RETRACTION MODIFICATION/KIT FOR DESIGN HARDWARE 1000 PRODUCT FEATURES

  • Simultaneous electric latch retraction and dogging (push bar depressed)
  • UL Listed for both panic and fire exit hardware
  • Available for mortise, rim, concealed and surface vertical rod exit devices
  • Field or factory installed
  • Quiet operation
  • Continuous duty rated
  • Low power consumption
  • 24VDC operation
    -ACSI Series 1400 power supplies recommended
  • Interface with life-safety systems
  • Non-polarized leads
  • On-board diagnostic LEDs
  • Automatic retry

ACSI ELECTRIC MOTOR LATCH RETRACTION MODIFICATION/KIT COLLECTION

  • ACSI 1550K-MDV Electric Motor Latch Retraction Modification/Kit for Von Duprin 33A/35A, 98/99
    ACSI 1550K-MDV22 Electric Motor Latch Retraction Modification/Kit for Von Duprin 22
    ACSI 1550K-MDC Electric Motor Latch Retraction Modification/Kit for Corbin Russwin ED4000, ED5000; Yale 7000
    ACSI 1550K-MDD Electric Motor Latch Retraction Modification/Kit for Dorma 9000
    ACSI 1550K-MDT Electric Motor Latch Retraction Modification/Kit for Hager 4500, 4600; PDQ 6200; Stanley Commercial Hardware QED100, QED200, QED300
    ACSI 1550K-MDS Electric Motor Latch Retraction Modification/Kit for Sargent 80; Arrow 1000, 3000, 4000
    ACSI 1550K-MDP Electric Motor Latch Retraction Modification/Kit for Precision 2000, 5000
    ACSI 1550K-MDF Electric Motor Latch Retraction Modification/Kit for Falcon 24, 25
    ACSI 1550K-MDH Electric Motor Latch Retraction Modification/Kit for Design Hardware 1000
    ACSI 1550K-MDX Electric Motor Latch Retraction Modification/Kit for Dorex 9500
    ACSI 1550K-MDO Electric Motor Latch Retraction Modification/Kit for Falcon 1690, 1790
    ACSI 1550K-VD Electric Solenoid Latch Retraction Kit for Von Duprin 33/35 and 98/99 Series Exit Devices

Product Specs

Subcategory:
Electric Motor Latch Retraction
Series:
1500 Series
Collection:
1500 Series
Product Type:
Electric Motor Latch Retraction Kits
Compatibility:
Design Hardware 1000
Warranty:
1 Year
Product Group:
Electronic Access Controls
Product Subgroup:
Parts and Accessories
Commercial/Residential:
Commercial
Electronic:
Yes
Lock Function:
Part/Component
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Function:
Part/Component
Electrical Configuration:
Motorized Latch Retraction
Product Category:
Electronic Access Controls
Department:
Door Hardware

ACSI 1550K-MDH – Frequently Asked Questions

1) Will the ACSI 1550K-MDH work on my Von Duprin 99 exit device?
No. The 1550K-MDH is built specifically for Design Hardware 1000 Series exit devices, and the motor kits are matched to the device family they mount in. For Von Duprin 33A/35A and 98/99 devices the correct kit is the ACSI 1550K-MDV, and for Von Duprin 22 it is the 1550K-MDV22.
2) Do I get the exit device with the ACSI 1550K-MDH latch retraction kit, or do I supply my own?
You supply the exit device. ACSI performs the electric latch retraction modification on a Design Hardware 1000 Series device you provide, so budget the device separately. The work can be done in the field or at the factory.
3) What power supply and voltage does the ACSI 1550K-MDH motorized latch retraction kit need?
24VDC, and ACSI Series 1400 power supplies are the recommended source. The leads are non-polarized, so you are not chasing polarity at the door, and the motor draws low current on a continuous duty rating, which matters when several openings run off one supply.
4) Can I use motorized latch retraction on a fire rated opening?
Yes, the ACSI 1550K-MDH modification is UL Listed for both panic and fire exit hardware. It also interfaces with life-safety systems, so it can be tied into the fire alarm to drop the retraction on alarm, which is what a fire rated opening requires.
5) Does the ACSI 1550K-MDH replace mechanical dogging on the push bar?
It does both jobs. The kit gives simultaneous electric latch retraction and dogging, holding the push bar depressed so the latch stays retracted for scheduled unlocked hours. Drop the signal and the device relatches, which is why this is the method used on fire rated devices that cannot be mechanically dogged.
6) How do I troubleshoot an ACSI motor latch retraction kit that is not pulling the latch?
Start at the on-board diagnostic LEDs on the 1550K-MDH module, which report the state of the circuit at the device. The kit also has automatic retry, so a latch that binds once will be re-driven rather than left sitting. Confirm 24VDC is present at the leads; polarity is not a factor because the leads are non-polarized.
7) Is there a quieter option than a solenoid latch retraction kit for a lobby door?
The motorized kits are the quieter route. The 1550K-MDH uses a motor rather than a solenoid and is specified for quiet operation and low power consumption, which is what you want on an occupied lobby or a leasing office. ACSI's solenoid version, the 1550K-VD, exists only for Von Duprin 33/35 and 98/99 devices, so on a Design Hardware 1000 the motor kit is the path.
8) I have mixed exit device brands across my buildings. Can I standardize on ACSI motorized latch retraction?
Yes, that is what the 1500 Series line is for. ACSI builds the same motorized latch retraction modification for a wide range of device makers: Design Hardware 1000 (1550K-MDH), Sargent 80 and Arrow 1000/3000/4000 (1550K-MDS), Corbin Russwin ED4000/ED5000 and Yale 7000 (1550K-MDC), Precision 2000/5000 (1550K-MDP), Falcon 24/25 (1550K-MDF), Falcon 1690/1790 (1550K-MDO), Hager 4500/4600, PDQ 6200 and Stanley QED100/QED200/QED300 (1550K-MDT), Dorma 9000 (1550K-MDD), and Dorex 9500 (1550K-MDX). One 24VDC power scheme and one behavior across a mixed fleet.
9) Is the ACSI 1550K-MDH suitable for a residential door?
No. It is commercial grade access control hardware, a modification made to a Design Hardware 1000 Series panic device. Exit devices with electric latch retraction belong on commercial egress openings, not on a house or an apartment entry door.
10) Can I get wiring diagrams for an ACSI 1550K latch retraction install?
Yes. ACSI engineers and technicians provide system design, wiring diagrams, and other technical services for these latch retraction modifications, which is worth using when the device is tying into an access control head end or a fire alarm relay.
How fast can I get the ACSI 1550K-MDH delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the ACSI 1550K-MDH come with a warranty?
Absolutely. The ACSI 1550K-MDH is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the ACSI 1550K-MDH?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the ACSI 1550K-MDH from ZenSupply?
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