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 RMX® Medium Duty Commercial Operator 


commercial operator 

The UL 325 2010 certified RMX® medium-duty commercial operator is designed for quicker installation and hassle-free operation. The RMX® offers convenient features and technical innovations found nowhere else in a medium-duty operator.


A wide variety of mounting options are available to fit any application including:

Sectional doors: Trolley for use on standard doors up to 14' high and 620 lbs.
Jackshaft models available with and without hoist for doors up to 16' high and 620 lbs.

Rolling steel doors: Jackshaft models available with and without hoist for use with rolling steel doors or grilles up to 16' high and 580 lbs.


Single-phase voltages of 115V AC and 230V AC in ½ horsepower

External radio hookups

External terminals are provided to allow an optional 3-wire radio system to be connected

Drive reduction

Primary reduction is SuperBelt®, an auto tension poly-V flex belt that does not require adjustment. Secondary reduction is by chain and sprocket

Direct coupling

Provides fast, easy installation with fewer parts and better structural support. Prevents chain slacking. Available on sectional side and center mount jackshaft and hoist units

Mechanical brake system

Solenoid actuated band brake


16-character LCD (Liquid Crystal Display) provides easy-to-read set-up and diagnostics with backlight for low-light conditions

Cycle counter

Displays the total cycles logged over the operator’s lifetime, to support warranty and service functions

Adjustable shaft

Output shaft can be moved from one side to the other, providing flexible installation options

Control system

On-board open/close/stop buttons make testing simple

Independent timers

Automatic maximum run timer stops the door moving in either the open or close direction if preset run time is exceeded, allowing for inspection


2-year or 20,000 cycle limited warranty

RMX® trolley

For use on standard lift doors up to 14' high and 620 lbs.

RMX® Jackshaft with and without hoist – sectional door

For use on vertical lift, lift clearance sectional door up to 16' high and 620 lbs.

RMX® jackshaft with and without hoist – rolling service doors and grilles

For use with rolling steel doors or grilles up to 16' high and 580 lbs. in weight

Accessories for RMX®


interface modules

Auxiliary Output Module - this plug-in module will provide several auxiliary sets of dry contacts that are microprocessor controlled. Outputs can be configured using the on-board keypad.

To maintain compliance when using a sensing edge as a primary safety device with our X-Series commercial operators labeled UL 325 2010, you must use one of the following modules:

timer to close module

Timer to Close Module - provides auxiliary control inputs, auxiliary safety inputs, auxiliary timer hold input, and an automatic door closing feature with a user-selectable time-delay. Safety inputs can be enabled or disabled using the on-board keypad. A sensing device must be used with this module.

monitored edge interface module

Monitored Edge Interface Module – provides an interface between two-wire monitored sensing edges and our X-Series operators. This module allows for the connection of a two-wire monitored sensing edge to be connected to the ODC STB terminals. Compatible for use on Miller Edge electronic two-wire monitored edge models ME, MT and MU.


transmitter for electrical operator

The RMX® operator features an external 3-wire radio hookup for fast and simple RF connectivity. Radio transmitters may be single-button, two-button, three-button, four-button, or Open/Close/Stop.


small motor for operator RHX

The following motors are available when specified:
Totally Enclosed Non Ventilated (TENV)
Totally Enclosed Fan Cooled (TEFC)

Sensing Devices

safety stripe

Bottom Sensing Edge - stop and reverses the door upon contact with an obstruction.

safety beam

Safe-T-Beam® - senses an obstruction and signals the operator to stop or reverse the door. Commercial Photo Eye Kit® - metal enclosure further protects Safe-T-Beam® photo eyes from damage.

NEMA 4/4X photo eyes

VITECTOR® NEMA 4/4X OPTOEYE is a set of infrared transmitter and receiver safety sensors constructed of durable materials to withstand the toughest environments including commercial and industrial applications.

monitored retro-reflective photo-eye

Monitored Retro-reflective Photo-eye - This photo-eye utilizes interference reduction technology, that enables further reduction of interference from reflective surfaces.