Liftmaster MJ 1/2 HP Side Mount Medium Duty Industrial Commercial Garage Door Opener

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List Price: $499.99
Our Price: $449.99
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Availability:: Usually Ships in 24 Hours
Product Code: MJ 50 11

Description

Compatibility

Includes

The Model MJ door operator is designed for use on industrial sectional doors with high or vertical lift and small rolling doors and grilles. Maximum recommended duty cycle: 12 cycles per hour.

Technical

Model MJ is a Medium Duty Logic jackshaft operator. It features a compact design, an adjustable friction clutch, a standard solenoid brake and a high-starting torque motor.
MEDIUM-DUTY LOGIC TECHNOLOGY
Added Value
UL325-2010 compliant Medium-Duty Logic programmable integrated circuit board
Built-in 3-channel, 315MHz radio receiver accepts up to 20 Chamberlain® Security+® or unlimited DIP switch remotes. 3-button remotes can be programmed for OPEN/CLOSE/STOP operation
Programmable C2 or B2 wiring options (B2 requires CPS-U, CPS-UN4, or CPS-EI)
Integrated timer-to-close (TTC) allows programming from 5 to 60 seconds in 5-second increments. Allows for timed automatic door closure after the door reaches the full open position (Requires monitored safety devices, with CPS-U, CPS-UN4, or CPS-EI)
Integrated 90-second maximum run timer
UL325-2010 Monitored Entrapment capability
Monitored protection against transient overvoltage conditions
3-button control station included
STANDARD FEATURES
Motor: Powerful 1/2 HP, 115V single phase motor with instant reverse and internal automatic reset thermal overload. Removable without affecting limit switch settings.
Operator/Motor Control: Solid-state Medium-Duty circuit board.
Control Circuit: 24V NEC Class 2.
Floor Level Disconnect: Floor level disconnect provides emergency manual operation.
Brake: Heavy-duty solenoid actuated brake standard.
Wiring Type: All operators are factory preset to C2 wiring providing momentary contact to open and stop with constant contact to close. Momentary contact to close (B2 wiring) can be easily set, but requires the presence of either CPS-U, CPS-UN4, or CPS-EI safety devices. The operator is pre-wired to accept a sensing device, photoelectric control, radio controls and most types of access control equipment.
Drive Reduction: First stage heavy-duty 4L V-belt; second stage and third stages #48 chain.
Push Button Station: 3-button station for OPEN/CLOSE/STOP functions is standard for all operators. Controls with 1, 2 and 3 buttons are available.
Construction: NEMA 1 Type electrical box, heavy-duty 11-gauge steel frame with durable baked-on powder coat finish, all reduction sprockets drilled and pinned to shafts.
Friction Clutch: Adjustable friction clutch helps protect against major damage to door and operator should the door meet an obstruction.
Radio Receiver: 315MHz radio receiver is integral to the Medium-Duty logic board. Accepts up to 20 Security+® remote controls and unlimited DIP switch remote controls.
Warranty: 2-year warranty.

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