Jackshaft operators are designed for use on rolling grilles and shutters as well as rolling doors.  Some operators are also designed for use on industrial sectional doors with high or vertical lift.  The Liftmaster® Medium-Duty Jackshift Operator features a compact design, an adjustable friction clutch, a standard solenoid brake and a high-starting torque motor.

FEATURES
Liftmaster® Medium-Duty Jackshift Operator

Standard Features:

• Our high-torque industrial 1/2 HP 115V single phase motor features instant reverse and automatic reset thermal overload.  The motor can be removed without affecting limit switch settings.
• The heavy-duty solenoid actuated brake is standard.
• A floor level disconnect provides emergency manual operation.
• A 3-button station for OPEN/CLOSE/STOP functions is standard for all operators.  Controls with one, two and three buttons are available.
• An adjustable friction clutch helps protect against damage to the door and operator should the door meet an obstruction.

Operator/Motor Control: Dependable dual relay system (NEMA1 enclosure).

Control Circuit: 24V NEC Class 2.

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.

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.

Control Accessories and Options Sensing Edge: (Recommended) Designed to sense an obstruction and signal door operator to stop or reverse as desired. Either an electric or pneumatic sensing device can be added to bottom edge of door.

Radio Control: Universal transmitters and receivers are available to signal the operator to open and/or close door.

Emergency Egress Device: Attractive faceplate mounts flush on wall and contains handle to disconnect operator from a grille, thereby allowing the grille to be opened manually or by spring tension.

Rolling Door Interlock Switch: Interlock switch disables the operator control circuit when a manual door lock is engaged preventing damage to the door and operator.

CPS® Commercial Protector System: (Recommended) An inexpensive "non-contact" photo safety sensor designed to sense an obstruction and signal the door operator to reverse to open.

 

• Safety of a non-contact infrared reversing sensor
• Fast and easy-to-install
• Patented electrical interface monitors system status at all time
• LED indicators for quick alignment
• One size fits all (for doors up to 30 ft. wide)