... quality best price SSD 590 Continental DC speed controller 590P Series Features: 1, volume small, ... small 40% 2, a variety of communication modules to choose from, such as PROFIBUS, MODBUS, DEVICENET, ... ,590 P selection and 590C with the same speed feedback, tachometer generator board / optical code plate ... 650/690P Series Inverter 8, all using software to define the form of the armature / field voltage ...