Commercial Openers

Model DHJ by LiftMaster

DHJ_CW_detail
Model DHJ is an industrial-duty hoist/jackshaft operator designed by LiftMaster, with an internal door lock sensor. Its features include:

A removable hinged electrical box cover
A continuous-duty high-starting torque motor
A universal-mount frame design
An industrial ball bearings on the output shaft
An emergency chain hoist with electric interlock
Adjustable door lock sensor
Easy emergency manual operation
Logic 4.0 (L4) technology
Built-in 3-channel, 315MHz radio receiver
Maintenance Alert SystemTM
Timer-to-Close technology
PosiLock® Mechanical Brake System
2-year warranty
Primary Monitored Entrapment Protection
Ancillary Entrapment Protection
2-Position Keylock

Specification

Continuous-duty high-starting torque motor with instant reverse and overload protection.
First-stage heavy-duty 5L V-belt; second and third stages #48 chain; #50 drive chain.
All operators are factory preset to C2 wiring providing momentary contact to open and stop, with constant contact to close; D1 and E2 wiring are also available.
Momentary contact to close (B2 wiring), T, TS, and FSTS wiring can be activated with the use of CPS-RPEN4, CPS-U, CPS-UN4, or CPS-EI safety edge interface.
Industrial ball bearings on a 1″ output shaft; heavy-duty oil-filled iron bearings on reduction shafts.
NEMA 1 type electrical box, heavy-duty 11-gauge steel frame with durable powdercoat finish, all reduction sprockets drilled and pinned to shafts.
2-button station for OPEN/CLOSE functions is standard with D or D1 wiring. 3-button station is standard with B2 or C2 wiring.

Additional Attributes

Switchless motor eliminates stuck start switch and motor malfunctions on single-phase operators
All high-voltage connections have been removed from the board for safety and ease of service
Diagnostic LEDs speed installation and troubleshooting
Motor direction jumper lets you change motor direction by simply moving a jumper
The operator is pre-wired to accept a sensing device, photoelectric sensors, radio controls and most types of access control equipment.
Quick, convenient connections for retrofitting or adding radio controls on logic or mechanical operators.
Adjustable friction clutch, helps protect against major damage to door and operator should the door meet an obstruction.
Available Plug-in Options for Logic 4.0 (L4) include Auxiliary
Contact, TLS1Card, CPS3 or CPS3-N4, and Mechanical Reversing
Contactor Circuit

All of these feature at a price you can afford – that’s the Protech Garage Doors and Gates experience!

Model MH by LiftMaster

MH_L4_CW_detail
A hoist operator powered by a medium-duty Logic technology perfect for your home or shop. Model MH is a Medium-Duty Logic hoist operator designed by LiftMaster. Its features include:

An adjustable friction clutch
Standard solenoid brake
High-starting torque motor
Compact design
Emergency chain hoist with an electric interlock
Integrated Timer-to-Close (TTC)
Easy emergency manual operation
Heavy-duty oil-filled bearings
2-year product warranty
Ancillary Entrapment Protection
Primary Monitored Entrapment Protection
Radio Control
Weathertight Control Devices
Rolling Door Interlock Switch

Specifications

UL325-2010 compliant Medium-Duty Logic programmable integrated circuit board
Built-in 3-channel, 315MHz radio receiver accepts up to 20 Chamberlain®
Security+® or unlimited DIP switch remotes
Programmable C2 or B2 wiring options
Powerful 1/2 HP, 115V single phase motor with instant reverse and internal automatic reset thermal overload
24V NEC Class 2 Control Circuit
First stage heavy-duty 4L V-belt; second and third stages #48 chain for drive reduction
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

Additional Attributes

3-button remotes can be programmed for OPEN/CLOSE/STOP operation
Integrated 90-second maximum run timer
UL325-2010 Monitored Entrapment Capability
Monitored protection against transient overvoltage conditions
Solid-state Medium-Duty circuit board
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, but requires the presence of either CPS-RPEN4, CPS-U, CPS-UN4, or CPS-EI safety devices

At Protech Garage Doors and Gates, we give you the best products and customer experience for your money’s worth.