The SP500 AC Drive line manufactured by Reliance Electric and owned by Rockwell offers a low cost alternative along with advanced technology and high performance. The durability, water resistant enclosure, and dust tight casing of SP500 drives makes them a clear choice for harsh environments. They were discontinued by Rockwell Automation in 2009. Our SP500 Inventory of New and Reconditioned Drives is among the most comprehensive in the world. The SP500 offers advanced technology to provide high performance and flexibility at an affordable price.