Model MJ is a medium-duty jackshaft operator. It features a compact design, an adjustable friction clutch, a standard solenoid brake
and a high-starting torque motor.
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.
Pushbutton Station: 3-button station for OPEN/CLOSE/STOP functions
is standard for all operators. Controls with one, two and three 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.
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.
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.
