Check the listing for details. PWM 9-60V 12A 500W DC Motor Speed Governor Controller Switch BMG Digital Display. Condition: New. Listed at 5.99 USD. PWM 9-60V 12A 500W DC Motor Speed Governor Controller Switch BMG Digital DisplayProduct Image: Product Description: 9-60V PWM DC Motor Speed Governor Controller Switch BMG Digital Display 12A 500W Production Description Question：Why does the motor governor need to set the frequency?The frequency of the motor governor is too low, the power supply ripple is large, the vibration of the motor is large, the frequency is too high, the switching loss is large, and the electromagnetic noise is relatively obvious. If the frequency selection is not suitable, the effective power output of the motor will be greatly reduced. The default frequency of this product is 20KHz, which can meet the requirements of most motors.Why does the motor governor use a digital encoder knob instead of a normal potentiometer? Description:1. Equipped with start-stop button, and can be external switch control, to meet various customer control requirements(note: the external switch should use the self-reset button or key, press to open and then press to close;It can't realize the function of opening output when it is closed all the time, and closing output when it is not closed.) 2. Motor soft start function. When starting the motor, the current increases slowly and there is no shock current, which can effectively protect the motor and prolong its service life 3. Duty cycle, duty cycle upper and lower limits and working frequency can be set to facilitate customers to operate and use their motors according to their working characteristics. 4. Digital encoder knob adjusts motor speed, which is more accurate and consistent than ordinary potentiometer. 5. With standard 5135 instrument shell, convenient for customer installation. Features:Working voltage: DC9V~60V, input anti-reverse connection protectionRated current: 12A maximum current 20AMaximum power: 500WWorking frequency: 1KHz~99KHz adjustable, 1KHz step, default frequency of 20KHz, accuracy of about 1%Duty cycle: 0-100%, 1% stepProduct size: 79mm*43mm*26mmInstall hole size：76.5mm*39.3mmProduct weight: 43g（Naked heavy）65.5g(With the packing)Packaging: carton packagingAll parameters can be set to power down storage. Operation of digital encoder knob：In the default interface :(the duty cycle is displayed by default)Short press -- switch motor start and stopLong press 10s -- to enter the setting interfaceCounterclockwise rotation -- the duty ratio decreasesClockwise rotation -- increased duty cycle Under the setting screen:Short press -- select setting parameters and switch between ON-OFF,duty cycle lower limit, duty cycle upper limit and working frequency.ON-OFF is to set the module to be normally open or closed by default. Rotate the encoder to switch to the default on-off state.The display form of duty cycle lower limit is "L" + two digits, the display form of duty cycle upper limit is "H" + two digits or "100", and the display form of working frequency is "F" + two digits. Long press 2s -- exit the setting interfaceCounterclockwise rotation - the corresponding Settings are reducedClockwise rotation - the setting parameters increase accordingly The stop button interface on the back：External switch keys or 3.3v level.Do not use in complex electromagnetic environments because there is no protection inside the circuit.(note that the external switch should use the self-reset button or key, press to open and then press to close;It cannot realize the function of output on when the switch is always closed and output off when the switch is not closed. Package Included： 1PC × PWM DC Motor Speed Governor Controller Switch BMG Digital Display 9-60V 12A 500W FeedbackWarrantyShipmentFeedbackWe appreciate your feedback very much. As it will motivate us do better. If you have any questions with our goods or service, Please kindly contact us firstly before leaving negative feedback. Thank you in advance Warranty1. All merchandise will be carefully test before shipping. We will try our best to avoid any quality problem. 2. We promise warranty for quality in one year and we will repair it free of charge. The returning shipping should be paid by customer. 3. If you are not satisfied with the product, Please contact us. We'll provide you a satisfying solution.Shipment1.Normmly we will send the goods within 1-3 working days after your payment is verified . 2.Please check if the goods are in good condition and sign before the delivery man leaves.If you find the product is lost or damaged on the way. Please take photo and let the delivery men confirm it. Then we will help you let the shipping company compensate you.On Jul-09-20 at 07:00:35 PDT, seller added the following information: