Profile: Electrodyn Systems Ltd. provides retrofit solutions. Our Model CR Call Registration Signal Unit provides illumination to existing car and hall buttons in elevator control logic systems. Our Model NUD door detector override with nudging control reduces door closing torque and provides an adjustable time cutout function for all existing electric eye and door detector systems. Our ElectroLock™ is an elevator door restrictor that offers flawless operation under any conditions. Our emergency power lowering system is a revolutionary power system to govern and control systematic return of elevator cars in emergency power situations.