high quality best price SSD 590 Continental DC speed controller 590P Series Features: 1, volume ... EI-BISYNC, LINK, etc. 3, high-resolution analog input and output points, 12bit + 4, simple control panel, providing the machine ... external-signal model; the native mode of operation convenient for initial use and debugging 5,590 P selection and ... five kinds of frame / size: SSD 590 DC motor speed regulator