Details : Fully solid-state design. Linear variation of speed. Suitable for 1/4 HP to 5 HP / single phase (4-wire or PMDC motors). Adjustable maximum and minimum Speed. Built in Current Limit / over Load Trip and Field Failure Protection. Control signal is optically isolated in modular design. Accepts speed control signal of (0-5) VDC, (0-10) VDC or (4-20) mA, hence suitable for machine automation. 1/4 DIN Size (TDM-10). Operates on 230VAC.