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COMMERCIAL
PRODUCTS -
LIFTMASTER COMMERCIAL OPERATORS |
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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.
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Safety of a non-contact infrared
reversing sensor
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Fast and easy-to-install
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Patented electrical interface
monitors system status at all
time
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LED indicators for quick
alignment
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One size fits all (for doors up
to 30 ft. wide)
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Return
to Shoals Overhead Doors' LiftMaster Commercial
Operators --->
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