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LiftMaster K1D8389-1CC Replacement Control Board DC K1D8389-1CCMC is the DC UL325 Main Control Replacement Board. For use with various LiftMaster DC Pad Mount Residential Commercial Swing and Slide Gate Operators; manufactured after 2016. This board is backwards compatible for older second generation units but will require UL325 Monitored Entrapment Protection System and Monitored Photoelectric Sensors or Edge Sensors on the OPEN entrapment zone that are now MANDATORY. Failure to add the OPEN Monitored Entrapment Zone Protection will cause the unit to not function properly. DC Logic control board for pad-mounted liftmaster operator The new model number for this item is K1D8389-1CCMC This board replaces model K1D9039-1CC Post 2016 with mandatory photocells. Must have a “U” by the model number CSW24U CSL24U RSL12U RSW12U