The ECS-20-S-1X is a single-input 3-phase motor speed controller device made by ECS Inc. It is designed to regulate the speed of a motor, while allowing the motor to be started, stopped, or otherwise operated remotely. It is equipped with a range of features, including phase-to-phase primary circuit protection, fast-load ramping, programmable soft-start, adjustable reference, and overload protection. It is designed for use with 208-240 or 380-480V AC, 50 or 60Hz, and is available in both 120V AC and 24V DC models.