The 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
- 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 B2 or C2 wiring options
- Integrated Timer-to-Close (TTC) allows programming from 5 to 60 seconds (CPS®-L or CPS®-LN4 photo-eyes required)
- Integrated 90-second maximum run timer
- Monitored entrapment capability
- Enhanced 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: Dependable dual relay system (NEMA1 enclosure).
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.. 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 3buttons 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.
External Radio Control Terminal: External terminals provide quick, convenient connections for radio controls.
Friction Clutch: Adjustable friction clutch helps protect against major damage to door and operator should the door meet an obstruction.
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