LiftMaster MJ Door Operator
LiftMaster MJ Door Operator is designed for industrial sectional doors with high or vertical lift, as well as small rolling doors and grilles. It supports a maximum duty cycle of 12 cycles per hour, making it ideal for light-to-medium commercial use. Available through authorized LiftMaster dealers and professionally installed for safe, reliable operation.
BY:
Performance
- Operates on 115V single-phase power
- Standard three-button control station for Open, Close, and Stop functions
- One-, two-, and three-button control options available
- Maintenance alerts notify when routine service is required
- Durable NEMA Type 1 electrical box with powder-coated finish
- Mounts on the left or right side of the door
- Wall-mounted design connects to the door shaft using chain and sprocket
- Model 3900 can mount directly to the door shaft
- Easy-to-set limits ensure accurate operation, even after a power failure
- Automatic Timer-To-Close feature with programmable
Safety & Security
- Fully compliant with all UL 325 safety requirements
- Security+® radio technology supports up to 20 remote controls
- Allows unlimited DIP switch remote controls
- Adjustable Friction Clutch helps protect the door and operator if an obstacle is encountered
- Signals the door to stop or reverse if closing time exceeds maximum travel limits
- Helps prevent damage to both the door and the operator
- Easily accessible disconnect allows quick emergency manual operation
- CPS-U Monitored Commercial Protector System for enhanced safety
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What doors is the LiftMaster MJ designed for?
The LiftMaster MJ Door Operator is designed for industrial sectional doors with high or vertical lift, as well as small rolling doors and grilles. It is ideal for light-to-medium commercial environments that require dependable performance.
What is the duty cycle of the MJ operator?
The MJ operator supports up to 12 cycles per hour, making it well-suited for facilities with moderate daily door usage such as warehouses, service areas, and light industrial buildings.
What power supply does the MJ operator require?
It operates on 115V single-phase power, which is commonly available in most commercial buildings and allows for straightforward installation.
How is the door controlled?
The operator includes a standard three-button control station for Open, Close, and Stop functions, with additional one-, two-, and three-button control options available to meet different access needs.
What safety features are included?
The LiftMaster MJ is fully compliant with UL 325 safety standards and includes an adjustable friction clutch, monitored CPS-U safety sensors, and maximum run-time protection to help prevent damage or accidents.
Does the MJ support remote controls and automation?
Yes. It features Security+® radio technology that supports up to 20 remote controls, unlimited DIP switch remotes, and includes a programmable Timer-To-Close feature for added security.
Is manual operation possible during emergencies?
Yes. An easily accessible disconnect allows the operator to be quickly disengaged for manual door operation during power outages or emergency situations.