LIFTMASTER - MJ
MJ
Medium-Duty Jackshaft Operator
- For use on standard-lift sectional overhead doors with mid-range duty-cycle requirements.
- Rated duty cycle: Maximum 12 cycles per hour; Less than 50 cycles per day.
- Suspends from ceiling directly attaches and controls a sectional door.
- Trolley with disconnect disengages operator for manual lifting in an emergency.
Features
Business Safety and Security
Security+®
Built-in 3-Channel Security+ Receiver allows you to learn/program up to 20 LiftMaster 315 MHz remote controls.
Safety Standards
Meets UL 325 Safety Standards.
Commercial Safety Sensors
Protect people and vehicles with safety sensors and accessories that stop the door from closing on obstructions.
Timer to Close
Integrated timer-to-close programmable from 5 to 60 seconds in 5-second increments. Allows for timed automatic door closure after the door reaches the full open position.
Commercial Power
115 Volts
1/2 HP, 115V single-phase motor
NEC Class
24V NEC Class 2 control circuit
Business Connectivity
Single Button Control
Single button control provides an additional input for single-button control fuctionality. Required for installation of any external radio receiver.
Auxilliary Limit Switches
Auxiliary limit switches provide additional limit switches with dry form C contacts at the open and closed door positions to control lights, heaters and dock levelers.
Interlock Switch
Interlock switch disables the operator control circuit when door is locked, preventing damage to the door and operator.
Installation & Support
Architect Documents
General Documents
- 2023 LiftMaster Commercial Door Operator Comparison Chart - French
- 2023 LiftMaster Commercial Door Operator Comparison Chart - Spanish
- 2025 LiftMaster Commercial Door Operator Comparison Chart - English
- LiftMaster Model MJ Product Guide - English
- LiftMaster Model MJ Product Guide - French
- LiftMaster Model MJ Product Guide - Spanish
Manual
- Electrical Box Assembly Replacement Kit for Model MH, MJ operators - English
- Frame Assembly Replacement Kit for Model “MH” & “MJ” Operators - English
- HMJ Owner
- LiftMaster Commercial Door Operators Service Guide - English
- LiftMaster K72-33889 Clutch Shaft Replacement Kit MJ
- LiftMaster Medium Duty Logic MT, BMT, MJ, MH, MHS, MGJ5011E User's Guide - French
- LiftMaster Medium Duty Logic MT, BMT, MJ, MH, MHS, MGJ5011E User's Guide - Spanish
- LiftMaster Medium Duty Logic MT/BMT/MJ/MH/MHS/MGJ5011E User's Guide
- LiftMaster MJ, MH, MHS, MGJ User's Guide
- LiftMaster MJ5011E Installation Manual - French
- LiftMaster MJ5011E Installation Manual - Spanish
- LiftMaster MJ5011U, MH5011U, MHS5011U, MGJ5011U Installation Manual - English
- LiftMster K72-33872-1 Installation Instructions
- MHS5011E QuickStart-2008
- MJ5011E Installation-2008
ⓘ California Residents: Proposition 65 WARNING
