The L510 AC Micro Variable Frequency Drive is a cost effective drive solution with a wide range of programming and capabilities.  It offers V/F mode or sensor-less vector operation and comes in 115V, 230V, or 460V.  Some features for the L510 series include PID process control loop, sleep mode, 0-10 VDC or 4-20mA feedback, and loss of feedback tracking detection.  The L510 has a built-in Modbus as well as digital an analog inputs.