Features * oil machine voltage, current and power of true RMS measurement automatic or manual control of oil machine startup and shutdown six programmable digital input 6 programmable switching output, low oil pressure, high water temperature, low oil level, oil High oil engine speed high / low, oil-overvoltage / undervoltage, overcurrent, high oil-frequency / low, oil machine power overload, programmable digital inputs such as pre-warning / shutdown. Battery voltage high / low alarm. Emergency shutdown, startup failed, fail to stop the alarm when the electric car brush controller unit power is not normal 1) electric vehicle controller internal power supply is generally a three-terminal regulator IC SX440, different types of controllers. General use 7805,7806,7812,7815 three-terminal regulator IC Dongguan generator SX440, their output voltages are 5V, 6V, 12V, 15V. 2) Set the multimeter to the DC voltage + 20V (DC) voltage regulator board sx440 gear production, the multimeter black pen with a red pen, respectively, against the turn to the black and red lines, observe multimeter readings are consistent with the nominal voltage, They should not exceed the difference between the upper and lower voltage 0.2V. 3) Otherwise, it means the controller's internal power supply fails, the general brush controller can replace the three-terminal voltage regulator integrated circuit troubleshooting. SX440 manufacturer _SX440_ faithful electromechanical provided by Dongguan Nan Zhongxin Electrical and Mechanical Services Department. Dongguan City, South City Zhongxin Electrical and Mechanical Services Department (zhongxin888.net.cn) strong, credible, in Dongguan, Guangdong and other industrial products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the faithful into the brilliant electromechanical and you work for a better future!