(55) WS220-20 is a high-performance and cost-effective three-phase BLDC motor controller. Voltage range is 50VDC to <>VDC (<>) The controller can drive the DLDC motor with HALL or without HALL (<>) The driver is based on advanced technology and provided with high speed, high torque, low noise, low vibration, overcurrent protection, overload protection, less phase line. Protection, D-Line Short Circuit Protection (4) This controller can be used in small equipment, power tools, exhaust fan, jade grinding machine, vibrating motor, etc. (5) External Potentiometer Control/External Voltage Control. With Surge Protection, Overcurrent Protection, Blocked Rotor Protection. Features: Rated Voltage: 20 to 50 VDC Rated Current: 12A Current Limiting: 15A Maximum Speed: 20000 RPM (the specific speed depends on the motor itself and the load) Storage temperature: -20°C~+65°C Usage environment: avoid direct contact with dust, fumes and corrosive gases Temperature: 0-45°C Humidity: <80%, no frost, no frost Shock: 5.9m/S2 max Storage Humidity: 0~95%RH Size: Approx. 9.5 x 6 x 3.5cm / 3.74 x 2.36 x 1.38in Weight: 258g via this speed control potentiometer; External Voltage: 10VDC External Voltage Speed Regulation; Note: Two-speed regulation cannot be used simultaneously 2. PG Speed Output Signal: There is a pulse output of 5 V-revolution between the port and the ground. The output frequency is set to P(Hz), the logarithm of the motor class is N and the speed is F(RPM), then the output speed frequency is P=F*N/60. 3. Alarm Output ALM Signal: There is a 5V alarm pulse output between the port and the ground. 4. Positive reversing function: F/R: Fiddle toggle switch on the corresponding side, the direction direction of the motor can be changed. For the switch toggle, the white part is up and down, then rotate it up and down. For the toggle switch, the white part is horizontal, and the twang horizontally. 5. Start-stop (two control modes): 1. External FR switch: transfer via switch. 2. Side toggle switch EN: for the toggle switch, the white part is up and down, then down for the beginning; for the toggle switch, the white part is horizontal, then dial to start Note: You can only turn one control at a time, one of the switches is closed and the other is valid. 6. Blocked rotor protection: If the motor stops working, turn it back on to start. 7. Power LED: Green LED: turn on and off 8. Status light: Red light: Two flashes in standby, after starting, turn off. 9. Insulation resistance: > 100M at room temperature and air pressure