Specification:
Item Type: DC Voltage Detection Module
Material: PCB
Working Voltage: DC12V
Measuring Range: DC0-55V
Relay Life: 100,000 times
Measurement Accuracy: 12-bit AD chip
Interface Description:
Input Terminal:
VCC: Positive power supply
GND: Negative power supply
AO: The positive pole of the measured voltage
GND: Negative pole of the voltage being measured
Output:
NC: NC terminal
COM: COM terminal
NO: NO terminal
Key Description:
K1: Short press to adjust, long press for 2 seconds to turn on/off display
K2: Short press to adjust the time selected position plus 1 long press for 0.5 seconds, display mode +1
Product Function (when The Measured Voltage Is Displayed, Long Press The K2 button for 0.5 seconds to adjust the mode +1):
P-1: Charge Monitoring: When the measurement is lower than the voltage VL, the relay is closed, and the voltage is higher than VH the relay is disconnected;
P-2: Discharge Monitoring: When the measurement is higher than the voltage VH, the relay is closed, and the voltage is lower than the relay is disconnected;
P-3: Pull-in Outside The Interval: When the stroke voltage is between and VH, the relay is disconnected, and the relay is closed in other cases;
P-4: In-zone Pull-in: When the measured voltage is between and V2H, the relay pulls in, otherwise the relay is off
P-5: Excessive Suction: When the measurement is higher than the voltage VL, the relay is closed, and the voltage is lower than the relay is disconnected;
P-6: Over Disconnection: When the measurement is higher than the voltage VL, the relay is disconnected, and the voltage is lower than and the relay absorbs;

Package List:
1 x DC Voltage Detection Module