The XH-M609 low-voltage cutoff module precisely monitors battery voltage.
When voltage drops below the preset protection threshold, it automatically disconnects the circuit to prevent battery damage from excessive discharge, significantly extending battery life.
After disconnection, power automatically resumes when voltage recovers to “protection voltage + hysteresis voltage.”
Note:
When the battery powers the module, the output voltage remains equal to the battery voltage while the relay is closed.
Therefore, both the module's operating voltage and the battery voltage must exceed 7V.
Operating Voltage Range: Compatible with wide-voltage DC systems, supporting 12V/24V/36V applications.
Load Capacity: A robust 20A relay directly controls most small to medium-sized electrical devices.
User-Friendly Interface:
All complex settings are managed via a clear LED display and intuitive “+” and “-” buttons, featuring straightforward and easy-to-understand operation logic.

【Setup Guide】
Set Protection Voltage:
Press “+” Display current value
Double-press “+” (decimal point flashes) Adjust with“+” Auto-save after 3 seconds.
Set Hysteresis Voltage:
Press “–” Display current value
Double-press “–” (decimal point flashes) Adjust with “+/–” Auto-save after 3 seconds.
Voltage Calibration:
Press and hold the “+” 3 seconds Voltage flashes
Calibrate using the “+” Automatically saves after 3 seconds.
Set Start Delay:
Press and hold the “–” 3 seconds Time flashes
Adjust using the “+/–” Automatically saves after 3 seconds.
Restore Factory Settings:
Simultaneously press and hold the “+” and “–” 1 second.