XH-M609 Low Voltage Disconnect Module 12–36V DC with Digital Display

XH-M609 Low Voltage Disconnect Module – 12–36V DC

The XH-M609 Low Voltage Disconnect Module is a DC battery protection module designed to disconnect a connected load when the battery voltage falls below a configured low-voltage threshold.

This module operates within a 12–36V DC input range and features a digital display for viewing voltage and settings. Its adjustable cutoff and recovery settings allow users to configure when the load disconnects and when it reconnects as battery voltage recovers.

The XH-M609 is suitable for compatible battery-powered projects where automatic low-voltage load disconnection is required.

Unlike a conventional battery management system (BMS), this module controls the connected load through its switching function. It should not be treated as a replacement for a battery pack's dedicated BMS.

Key Features

• 12–36V DC input: Designed for battery systems within the listed voltage range.

• Adjustable low-voltage cutoff: Set the voltage threshold for disconnecting the load.

• Recovery voltage setting: Configure the voltage difference for load reconnection.

• Digital display: View voltage and setting values.

• Automatic load disconnect: Disconnects the load when the configured low-voltage condition is reached.

• Automatic recovery: Reconnects the load when the configured recovery condition is met.

• Voltage control accuracy: Listed as 0.1V.

• Compact module: Suitable for compatible battery and DC load projects.

Technical Specifications

Current rating note: Seller listings differ on current rating. Robotics.org.za lists 10A maximum, while Digilog marks its current specification as requiring verification. I have not included a confirmed current rating in the product title or key features. Verify the exact board's relay and DC switching rating before connecting a load.

How It Works

The XH-M609 monitors the input battery voltage and controls the connected load according to the configured voltage settings.

1. Connect a compatible battery or DC source within the module's specified input range.

2. Set the low-voltage cutoff threshold.

3. Configure the recovery voltage difference.

4. Connect the load to the module's output terminals.

5. When battery voltage reaches the configured cutoff condition, the module disconnects the load.

6. When voltage recovers to the configured reconnection condition, the load is connected again.

The exact setting procedure should be followed using the documentation supplied with the module.

 Typical Applications

Potential applications include:

• 12V battery systems

• 24V battery systems

• Compatible 36V battery systems

• Battery-powered DC loads

• Solar battery load disconnect projects

• DC lighting protection projects

• Battery-powered pumps

• Compatible backup power systems

• Electronics and engineering projects

These are application examples. Confirm that the load voltage, current, and switching requirements match the exact XH-M609 module.

Installation Caution

• Use only within the specified DC 12–36V input range.

• Verify input and output terminal polarity before connecting.

• Confirm the module's actual current and relay rating before connecting a load.

• Do not assume a 20A relay rating applies at 36V DC.

• Use suitable wiring and insulation for the connected load.

• Disconnect power before changing wiring.

• Set the cutoff and recovery thresholds according to the battery manufacturer's requirements.

• This module is a low-voltage disconnect device, not a substitute for a battery BMS.

• Do not use it as a charging controller unless the exact product documentation explicitly supports that function.

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