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Overhead-door-rhx-motor, mounting a wide variety of mounting options are available to fit any application including: sectional doors: standard trolley, side mount trolley, and dual trolley applications. side mount and center mount chain couple or direct couple to the door shaft with hoist. hoist models are left or right-hand adjustable in the field.. Overhead door is a trademark and rhx, code dodger and the red ribbon logo are registered trademarks of overhead door corporation. all other trademarks are property of their rightful owners. consistent with our policy of continuing product improvement, we reserve the right to change product specifications without notice or obligation., available for rhx®, rsx®, rmx®, rdx®, and cdx™ operators. the ul 325 2010 compliant monitored edge interface module allows the operator to monitor the sensing edge; providing advanced safety and security to the door system.