Using high-performance ARM processor as the core, the adoption AC220V / 50 hz power supply (+ / - 10%), using six digital tube speed display, has 400 lines, 1024 lines and 2048 line standard encoder input interface, integrated analog output function, range - 10 v ~ 10 v, voltage range can be adjusted according to the input speed, has the very good dynamic response, and the controller constitute a closed loop control, with the RS - 485 communication interface support standard Modbus RTU communication protocol. The installation mode is industrial grade cabinet.