The KB Electronics KBMM-225 from HMA Flow & Industrial is an adjustable-speed DC drive. It controls motors between 1/50-1.5 HP (3.0 HP w/aux. heat sink) by inserting the proper plug-in horsepower resistor. The KBMM-225 motor speed control is designed for 180 VDC PM and shunt motors. The speed range is 50:1, with a load regulation of 1%. Features include an AC line fuse and armature fuse holder, auto-inhibit, voltage following, MOV transient protection, 5K speed pot and trimpot adjustments for Min, Max, Accel, Decel, IR and CL. Options include an auxiliary heat sink, barrier terminal board, RFI/EMI filters and signal isolation (Model SI-6).