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Medium Duty Jackshaft Operator

PowerMaster Model MJ operators are designed for use on standard lift sectional doors, rolling service doors and grilles. Limit 10 cycles per hour.

  • PSC motor with full overload protection 
  • Solid state circuitry with power and program feedback LEDs 
  • Onboard open/close/stop buttons for service and adjustments 
  • Auto-detect monitored photo beam 
  • Floor level disconnect for manual operation
Cycles Per Hour10
Power Options115V, 1PH
Battery BackupNO
Travel Speed##
Shipping Weight (approx.)78lbs
MJ Line Drawing


Medium Duty Jackshaft Operator

Specifications & Features

  • Available Horse Power: 1/2 HP
  • Power requirements: 115V 1 ph
  • PSC Motor with Full Overload Protection
  • Solid State Circuitry with Power and Program Feedback LEDs
  • Onboard 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.
  • Heavy Duty V-Belt and Chain Reduction, Mechanically Self Locking
  • #41 Roller Chain and drive sprocket Included
  • Adjustable Torque Limiting Clutch
  • Baked on, Black Powder Coat Finish
  • Shipping Weight: approx. 78 lbs
  • Shipping Dimensions: 27″ x 16″ x 18″

Manual / Cut Sheet

Wiring Diagrams

Model Options