USAutomatic 500021 RANGER Control Board (RED) | USAutomatic RANGER Control Board is the redesigned, enhanced mother-board for the (510006) arm used on Ranger HD SINGLE USAutomatic Ranger HD Swing Gate Operator SINGLE and US Automatic Ranger HD Swing Gate Operator DUAL. Board controls actuator arm/s and manages functions of safety items and other auxiliaries. Used for install, calibration and maintenance of RANGER HD model Swing Gate Operators.