... 3571I/O Inputs Emergency Button,2xLow Voltage Analog, 2xHigh Voltage Analog, ACC Status, Engine Status, Door Status, Brake Status, Remote ... door-opening, Voltage Analog Input, Low battery voltage alarm, emergency brake, etc.Serial Port RS232 For connecting external intelligent devices such ... or leaves a designated area at a specified time.Emergency Brake Alert when the vehicle’s speed drop per second) ...