1. Introduction and Overview
This manual provides comprehensive instructions for the NJ-AOXIONG AX-HB02 system, which includes a throttle with key switch, a display unit, and 48V 25A dual drive controllers designed for electric scooters. This system is engineered to manage the speed and power delivery to your scooter's motors, enhancing control and ride experience.
The package includes:
- 1 x NJ-AOXIONG AX-HB02 Throttle Display with Key Switch
- 2 x 48V 25A Dual Drive Controllers
- 1 x Controller Cable

Image: Overall view of the NJ-AOXIONG AX-HB02 system components.
2. Safety Information
⚠️ Important Safety Warning: Electric scooter controller installation is complex and requires professional expertise. Improper installation can lead to product damage, circuit board burn, and potential safety hazards. It is strongly recommended to seek professional assistance for installation.
- Always ensure the electric scooter is powered off before attempting any installation, maintenance, or inspection.
- Disconnect the battery before working on electrical components.
- Be aware of potential fire risks, especially during charging and storage of the scooter's battery. Always follow the battery manufacturer's instructions for charging and storage.
- Ensure all connections are secure and properly insulated to prevent short circuits.
- Do not operate the scooter if any components are damaged or malfunctioning.
3. Setup and Installation
The NJ-AOXIONG AX-HB02 system is designed for integration into electric scooters. Due to the complexity of electrical systems in scooters, professional installation is highly recommended.
3.1 Components Overview
- Throttle Display with Key Switch: This unit includes the throttle for speed control, a display for operational information, and a key switch for powering the scooter on/off. It connects via a 6-pin interface.
- Dual Drive Controllers: Two 48V 25A controllers are provided for managing dual motor setups, ensuring synchronized power delivery.
- Controller Cable: Used for connecting the various components of the system.

Image: NJ-AOXIONG AX-HB02 Throttle Display with Key Switch.

Image: Two 48V 25A Dual Drive Controllers.

Image: Detail of a 48V 25A Controller with wiring.

Image: Controller connecting cable.
3.2 Installation Steps (General Guidance - Professional Installation Recommended)
- Power Disconnection: Ensure the scooter's battery is completely disconnected before starting any work.
- Mounting the Throttle Display: Securely mount the NJ-AOXIONG AX-HB02 throttle display unit on the handlebar in a comfortable and accessible position.
- Controller Placement: Install the two 48V 25A dual drive controllers in a protected area within the scooter's frame, ensuring they are free from moisture and physical damage.
- Wiring Connections:
- Connect the 6-pin interface cable from the throttle display to the designated port on the main controller.
- Connect the controllers to the scooter's battery, motors, and other necessary components (e.g., brake sensors, lights) using the provided controller cable and existing wiring harness. Refer to your scooter's specific wiring diagram for precise connections.
- Ensure all connections are firm and correctly matched (voltage, current, signal).
- Secure Wiring: Route and secure all cables to prevent pinching, abrasion, or interference with moving parts.
- Final Check: Before reconnecting the battery, double-check all connections for correctness and security.
4. Operating Instructions
- Power On: Insert the key into the key switch on the throttle display and turn it to the 'ON' position. The display should illuminate, indicating the system is active.
- Throttle Control: Gently twist the throttle grip to accelerate the scooter. The speed will increase proportionally to how much the throttle is twisted.
- Power Off: Turn the key switch to the 'OFF' position to power down the scooter. Always remove the key when leaving the scooter unattended.
- Display Information: The display provides real-time information about your scooter's status, such as speed, battery level, and possibly other parameters depending on the scooter's integration.
5. Maintenance
- Regular Inspection: Periodically inspect all cables and connectors for signs of wear, damage, or loose connections.
- Cleaning: Keep the throttle display and controllers clean and free from dust, dirt, and moisture. Use a soft, dry cloth for cleaning. Avoid using harsh chemicals or excessive water.
- Environmental Protection: Protect the controllers and display from extreme temperatures, direct sunlight, and heavy rain.
- Professional Check: Consider having your electric scooter's electrical system, including the controllers and throttle, inspected by a qualified technician annually.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to display/scooter | Key switch off, loose battery connection, discharged battery, faulty wiring. | Ensure key is 'ON'. Check battery connections and charge level. Inspect wiring for damage. If issues persist, consult a professional. |
| Erratic speed control | Loose throttle connection, faulty throttle, controller issue. | Check throttle cable connection. If problem continues, professional diagnosis is needed. |
| Motors not responding (dual drive) | Controller malfunction, motor connection issue, wiring error. | Verify all motor connections to both controllers. Given the complexity of dual drive systems, professional inspection is strongly advised. |
| Display not showing information | Loose 6-pin display cable, display unit fault. | Check the 6-pin connection to the controller. If the display remains blank, it may require replacement or professional repair. |
Important Note: As mentioned in the safety section, the installation and troubleshooting of electric scooter controllers can be complex. If you are unsure about any step or encounter persistent issues, it is highly recommended to seek assistance from a qualified electric scooter technician to prevent further damage or injury.
7. Specifications
| Feature | Specification |
|---|---|
| Throttle Display Model | NJ-AOXIONG AX-HB02 |
| Controller Type | Dual Drive Controllers |
| Voltage Rating | 48V |
| Current Rating | 25A |
| Display Interface | 6-pin |
| Color | Black |
| Origin | Mainland China |
| Package Length | 20 cm |
| Package Width | 20 cm |
| Package Height | 15 cm |
| Package Weight | 0.9 kg |
8. User Tips
- This system is specifically designed for electric scooters, ensuring compatibility and optimal performance for this application.
- The inclusion of 'Dual Drive Controllers' means this system is capable of managing two motors simultaneously, which is ideal for scooters requiring enhanced power and traction.
- Always ensure the key switch is in the 'OFF' position and the key is removed when the scooter is not in use to prevent accidental activation and enhance security.
9. Warranty and Support
For any technical support, warranty claims, or questions regarding the NJ-AOXIONG AX-HB02 system, please contact the seller or manufacturer directly. Provide your purchase details and a clear description of the issue to facilitate prompt assistance.