EM-285 DC-Motor Speed Regulator. EM-285 is a PWM-based DC-motor driver. The materials and features meet the industrial standards. Motor voltage is regulated against supply voltage changes, and there is also a load compensation adjustment (RxI), which enables steady speed during motor loading. Speed continuous to 1-direction Motor size 30-200W Good speed regulation Load compensation adjustable RxI Adjustable current limit Overheating protection Panel mountable Small size EMC tested