Model MH is a
medium-duty hoist operator. It features an adjustable friction clutch,
a standard solenoid brake, a high-starting torque motor, a compact design
and an emergency chain hoist with an electric interlock.
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
(NEMA 1 enclosure)
Control
Circuit: 24V NEC Class 2.
Emergency
Manual Operation: Model MH provides
easy emergency manual operation using a floor level disconnect and an
electrically interlocked chain hoist mechanism.
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 and third stages #48 chain.
Bearings:
Heavy-duty oil-filled bearings.
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.
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.
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.
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.
Weathertight
Control Devices: A variety of weathertight
control devices are available including 3-button control stations, key
control stations and digital keypads.
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 times
- LED indicators for quick
alignment
- One size fits all (for doors
up to 30 feet wide)