ADM21 Automatic Door Operator

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Automatic Door Motorized Operator
Mounts to the top of our ADA gates for motorized operating control.


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The Automatic Door Operator for single doors is a heavy-duty Motorized Opener and Closer for high use, low energy applications. Add this to your standard door or gate for motorized operation. Available in single, pair (twin) for independent, simultaneous, and dual egress openings. This unit meets requirements for ANSI/BHMA A156.19 (American National Standard for Power Assist and Low Energy Power Operated Doors) and provides standard features that meet the requirements of the American Disabilities Act.

Data Sheet

Production Sheet

Installation Manual – Automatic Door Operator

Installation Manual – UDC1000 Controller for Automatic Swing Door Control



  • This economical operator provides safe and easy access in medium to high-traffic and security areas
  • Provides ADA-compliant access to handicap applications
  • Hanger plate allows quick installation
  • Adjustable delayed activation for sequenced vestibule doors
  • Reverse on obstruction stalls a door during the closing cycle and re-activates to open if an obstruction is sensed anytime before the latch position
  • Power close applies a reverse power to aid in the latch check position
  • Quiet operation
  • 115VAC power plug-in mounted in the header
  • Adjustable closing speed
  • Available in single, pair (twin) for independent, simultaneous, and dual egress openings
  • Anodized Finish in Silver Steel or Dark Bronze

Mechanical Options

  • LH Push – Left Hand Push
  • RH Push – Right Hand Push
  • LH Pull – Left Hand Pull
  • RH Pull – Right Hand Pull



  • Power Requirements: 115VAC 60 HZ 3 amps
  • Motor: 115VDC rectified, 1/8 hp, 60:1 gearbox
  • For use on doors 300 lbs or less
  • Module:
    Activation input terminals
    Form C-lock switch terminals
    Safety lock-out built-in
    17 additional features standard onboard
  • Dimensions:
    • 7” high x 4 1/2” deep x chosen length
    • 39.5” – Fits above most 36” doors (standard)
    • 45.5” – Fits above most 42” doors
    • 52” – Fits above most 48” doors
  • Approximately 50 lbs
  • Aluminum extrusion



Additional information

Weight 50 lbs
Dimensions 9 × 9 × 54 in

Left Hand Push, Right Hand Push, Left Hand Pull, Right Hand Pull

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