
Jackshaft
Model MJ
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.