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12-80V PWM DC Motor Speed Controller Governor With Digital Display Panel 30ATECHNICAL PARAMETERS Input Voltage: DC 12V-80V Power: max 250W cont. for 12V; max 350W cont. for 24V; max 500W cont. for 48V Max Current: 30A Speed Adjustable Range: 0~100% PWM Frequency: 21 kHz SPECIFICATIONS:Controller Dimensions: 4.33" * 2.95" * 1.10" Panel Mounting Dimensions: 3.43" *2.52" Panel Dimensions: 3.62" *2.72" * 0.51" Net weight: 0.42lb IMPORTANT NOTES: DC motor controller input is DC, cannot be directly connected to AC Positive and negative power supply cannot be reversed, otherwise the controller will be damaged Functions Setting: Function 1: Soft-start Setting. ["000"-"100"], Soft start to 100% speed time can be adjustable between 0-10.0s. Default is 1s. Function 2: Soft-stop Setting ["000"-"100"], Soft stop time can be adjustable between 0-10.0s. Default is 1s. Function 3: MIN Speed Setting ["000"-"080"], The min speed can be adjustable from 0 to 80%, and must be less than the max speed setting value. Default is 0. Function 4: MAX Speed Setting ["000"-"100"], The max speed can be adjustable between 0-100%, and must be more than the min speed setting value. Default is 100% Function 5: Speed Regulation Accuracy Setting ["000", "002" , "005" , "010" , "015", "020" , "025"], Accuracy: 1%, 2%, 5%, 10%, 15%, 20%, 25% can be chosen. Set the min changed value, when press the UP or DOWN keys.