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1. What is a connector?
2. Xiaomi 400G Kitchen Water Purifier Mainboard Interface Definition
Xiaomi 400G Kitchen Water Purifier Mainboard Interface is mainly divided into five categories: power supply, waterway control, filter monitoring, sensors, and communication. Different models have different details, which should be determined based on the specific product manual..
1. Power Interface 1) The DC input interface is usually labeled as DC IN , with a voltage of 24V/360mA (some models are 12V), used to connect an external power adapter to power the motherboard. 2) The power output interface is labeled as DC OUT and outputs a stable voltage to loads such as water pumps and solenoid valves, paying attention to positive and negative polarity (some interfaces have fail safe design).
II. Waterway Control Interface 1) The high-pressure switch interface is labeled HP SW, and the high-pressure switch is connected to detect the pipeline pressure. When the pressure reaches the standard, it triggers the shutdown to prevent overflow.
. 2) The interface label for the low-voltage switch is LP SW . When the inlet pressure is too low (such as<0.05MPa), it triggers a protective shutdown to prevent the water pump from running idle. 3) Electromagnetic valve interface: The inlet solenoid valve (IN SOL) controls the raw water to enter the RO membrane; FLUSH SOL controls the flushing of the RO membrane to extend the lifespan of the filter element; The Waste Water Solenoid Valve (WASTE SOL) regulates the proportion of wastewater, and some models have a combination interface. 4) The interface label for the booster pump is PUMP , and when connected to the RO membrane booster pump, it should be matched wi
III. Filter Monitoring Interface 1) The RO membrane filter interface is labeled as RO , and some models have a RO TDS sub interface to monitor the TDS values before and after the RO membrane to determine the lifespan of the filter.
. 2) Pre filter interface: PP (PP cotton), GAC (activated carbon), CTO (compressed activated carbon), some models use FLOW METER (flow meter) to monitor water flux and assist in determining filter blockage. 3) The interface label for the rear filter element is POST (rear activated carbon), and some models are integrated into the RO membrane monitoring circuit.4. Sensors and Auxiliary Interfaces: 1) The TDS sensor interface is labeled as TDS to monitor the TDS value of pure water production and display it on the device or app.
. 2) The interface label of the temperature sensor is TEMP , which detects the inlet water temperature (suitable temperature for Xiaomi water purifiers is 5-38 ℃), and triggers protection when the temperature is abnormal. 3) The interface label of the water leakage sensor is LEAK , which is connected to the water leakage sensor at the bottom of the machine body. When there is water leakage, it will automatically shut down and give an alarm.Fifth, Communication and Display Interface 1) WiFi module interface labeled WIFI, connected to WiFi module to achieve remote control of APP (such as Xiaomi Mi Home APP). 2) The display interface is labeled as LCD or OLED , and the body display screen displays information such as filter life and TDS value. 3) The button interface is labeled as KEY and connected to the physical buttons on the body (such as reset button and flush button). Attention: The interface
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