Feature: 1, the current sensor chips: ACS712ELC-30A;2, pin 30V power supply, on-board power indicator;3, the module can measure the positive and negative 30 amps, corresponding to the analog output 66mV / A;4, no test current through the output voltage is VCC / 2;5, PCB board size: 31 (mm) x13 (mm); Specification:ACS712ELC-30ACorresponding analog output: 66 MV/APower supply: 5 VMeasurement of plus