LCN 6400 COMPACT series low-energy automatic operator has the ability to convert existing LCN 4040XP mechanical door closers to touchless solutions, for automated opening and closing when combined with an actuator. The motor gearbox assembly connects to a standard 4040XP with a mounting plate and four screws. The electrified module drives open the mechanical closer. The product is useful for interior doors in multiple institutional and commercial facilities.