Gear Reduced Operators : D-MG Operator

Gear Reduced Operators

Model D-MG Operator

PowerMaster model D-MG Industrial Duty Hoist type operator with DC motor is designed for use on Sectional Doors with High Lift or Vertical Lift and Rolling Service Doors and Grilles.

Specifications & Features:

  • Available Horsepower: 588 watts (1/2HP equivalent)
  • Power Requirements: 115VAC
  • Battery Back-up
  • High Starting Torque Motor with Full Overload Protection
  • Solid State Circuitry with Power and Program Feedback LEDs
  • On Board Open/Close/Stop buttons for service and adjustments
  • Terminals labeled and grouped by function
  • Auto-Detect monitored photo beam for simplified installation
  • Selectable Operating modes B2, C2, D1, E2, T, TS
  • Field adjustable built in functions including: timer to close, mid-stop, delay on reverse, lock bar sensing, maximum run time, etc.
  • Mechanically Self Locking Gear Reducer (Oil Bath Type)
  • Heavy Duty #50 Roller Chain and drive sprocket Included
  • Floor Level Disconnect w/Chain Hoist Assembly & Electrical Interlock (For Manual Operation)
  • Adjustable Torque Limiting Clutch Optional
  • Baked on, Black Powder Coat Finish
  • Shipping Weight: Approximately 132 lbs
  • Shipping Dimensions: 33" x 17" x 20"

Primary speed reduction is by an industrial gear box with bronze worm gear in an oil bath. Motor is DC, continuous duty industrial protected from overload by a current sensing or thermal type overload device. Motor controller is heavy duty, full voltage, across the line, magnetic reversing contactor, that is mechanically and electrically interlocked. Electrical components in a NEMA 1 enclosure integral to the operator. A transformer is provided to reduce control voltage to 24 VAC. Separate terminal strips are provided for connection of power supply line and all control devices. Operator wired for an Open/Close/Stop control station.

Positive chain driven, rotary type limit switches are provided to limit full open and close travel of door. Limit switch adjustment is not affected by removal of motor or by manual operation of door. A floor level manual hoist chain is provided for emergency operation of door. An electrical interlock switch is provided to disable control circuit while manual hoist chain is engaged. Final drive chain is a #50 roller chain. Operator is capable of right or left hand mounting in either a vertical or horizontal position.


© 2018 V.E. Power Door Co., Inc.