Schneider Electric 8839 66UMA4CBNNHNANNNN Motor Controller

Schneider Electric's 8839 66UMA4CBNNHNANNNN is an enclosed Altivar 66 motor drive designed for robust, variable-speed control of three-phase induction motors in industrial settings. Catalog number 8839 identifies an enclosed Altivar 66 Controller packaged with a door-mounted enclosure built for harsh environments and ready for installation in control panels. It is configured for 208/230/460 V three-phase power and supports variable-torque operation with ramped start/stop control, enabling smoother motor acceleration and deceleration. Optional configurations include a By-pass option (B07) that adds three contactors, an overload relay, and a drive-off-bypass selector switch, and the SPL1 option offering a hand-off-auto selector with a manual speed pot that uses a 0–10 VDC input for autospeed references. This combination lets you bypass the drive for direct motor operation when needed while retaining full drive control for speeds, torque, and protection managed by the Altivar 66 family. The unit's compact enclosure and compatibility with Schneider Electric automation ecosystems make it suitable for a range of industrial applications where reliable, adjustable-speed motor control is required.