LiftMaster K75-50893 Safety Interlink Kit

Motor Disable Interlock for LiftMaster Gate Manual Override The LiftMaster K75-50893, marketed as a Safety Interlink Kit, is a motor interlock assembly designed to disable the gate operator when a manual crank is inserted. Installed directly behind the crank input shaft, this assembly uses built-in limit switches to cut power to the drive motor, preventing accidental motor engagement while a user is manually operating the gate. This is a critical UL325-compliant safety device included in LiftMaster's legacy SL3000 series systems. Key Features Disables motor while crank is engaged Integrated limit switches automatically cut drive power Protects users during emergency or maintenance cranking Installed behind the crank input; triggered by crank tool insertion Labeled by LiftMaster as “Safety Interlink Kit” but functions as a motor interlock Technical Specifications Part Number: K75-50893 Function: Manual override interlock (motor shutoff via limit switches) Compatibility: LiftMaster