Model MT is a medium-duty trolley operator for
standard lift sectional doors. It features a
high-starting torque motor, a compact design,
quicket-gliding rail spacers and a quick-mount
swivel header bracket.
Standard Features:
Motor:
Powerful 1/2 HP, single phase
motor with instant reverse and internal
automatic reset thermal overload. Removable
without affecting limit switch settings.
Auxiliary Reversal System:
Designed to protect the door
and door operator from damage; if a closing door
strikes an obstruction, the Auxiliary Reversal
System will detect the slip of the clutch and
reverse the door to the full open position. This
system is not a substitute for a safety sensing
device such as a photo cell or reversing edge.
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.
Rail
Assembly: High
strength dual L-rail track with exclusive nylon
quiet gliding chain guides on rail spacers for
quiet, smooth operation. Includes quick-mount
header bracket which provides fast, swing-up
installation.
Operator/Motor Control:
Dependable dual relay system (NEMA
1 enclosure).
Control
Circuit: 24V
NEC Class 2.
Drive
Reduction:
First stage heavy-duty 4L V-belt; second and
third stages #48 chain; output on trolley #48
chain.
Emergency Disconnect:
Spring-loaded disconnect for
emergency manual operation.
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 baked-on powder coat finish,
all reduction sprockets drilled and pinned to
shafts.
Bearings:
Heavy-duty, oil filled bearings.
External
Radio Control Terminal:
External terminals provide
quick, convenient connections for universal
radio controls.
Friction
Clutch:
Adjustable friction clutch helps protect against
damage to the door and operator should the door
meet an obstruction. Works in conjunction with
the Auxiliary Reversal System.
Control
Accessories and Options:
Solenoid
Brake:
Solenoid actuated brake prevents coasting. Order
operator BMT. Standard on 3/4 HP and higher.
Auto-Reconnect Trolley Assembly:
Spring-loaded trolley features
nylon inserts for quiet operation and
auto-reconnect feature eliminating the need to
manually reattach the door arm to the trolley
after emergency disconnect.
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.
Key
Switch:
Designed to restrict operation of door to
authorized personnel only. Various types
available.
Interlock Switch:
Prevents accidental operation
of the door by interrupting the control circuit.
Commercial Protector SystemTM (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 times
-
LED indicators for quick alignment
-
One size fits all (for doors up to 30 feet
wide)
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