The Model KBMD-240D, also called Multi-Drive™, is a packaged SCR drive in a NEMA-1 enclosure. It utilizes the KBMM™ speed control for its electronics. The Multi-Drive™ is rugged and compact in size. It handles both 115 and 208/230 Volts AC line inputs by setting the built-in Dual Voltage Switch. In addition, the single model can be used on a wide range of motor horsepower by inserting the appropriate Plug-In Horsepower Resistor®. The Auxiliary Heat sink (optional) increases the rating of the basic unit to 1 HP at 90 VDC and 2 HP at 180 VDC. An optional Forward-Brake-Reverse Switch Kit is also available. Dimensions (L x W x H approx.): 5.1" x 5.4" x 7.1".