1. Introduction
The VOTOL EM200-2sp is a programmable sine wave controller designed for brushless DC motors, featuring flux-weakening capabilities. It is specifically engineered for use in e-scooters and e-motorcycles. This controller is a cost-effective solution with an IP67 waterproofing grade, suitable for motors ranging from 4kW to 8kW.
While generally compatible with QS Motors, matching with other motor brands may require self-testing and parameter adjustments to ensure optimal performance.

2. Product Overview
Key Features
- Utilizes imported materials for enhanced quality.
- Features an aluminum substrate scheme where the Moss tube is laid on the aluminum substrate and then placed on the PCB board, contributing to better heat dissipation.
- Compact size for versatile integration.
- Offers high efficiency, low temperature rise, and small running current.
- Equipped with flux weakening function for improved motor performance.

Package Contents
Each set includes:
- 1 x EM200-2sp CAN sine wave controller with enlarged heat sink
- 1 x USB programmable cable
- 1 set x Function cable
- 1 x Manual & software download link
EM200-2sp vs. EM200sp Comparison

The EM200-2sp model offers several improvements over the EM200sp:
- Enhanced heat dissipation performance.
- Improved waterproofing.
- Smaller overall size.
- Utilizes an AMP connector for the wiring harness, providing greater stability and reducing poor contact issues common with traditional wiring harnesses.
- The connector is universal with EM150-2 and EM260 controllers, allowing for interchangeable wiring harnesses.
- The software and programming interface are consistent with EM150-2 and EM260 controllers, simplifying debugging.
3. Specifications
| Attribute | Value |
|---|---|
| Controller Type | DC Motor Controller |
| Placement on Vehicle | Rear |
| Country/Region of Manufacture | China |
| Special Features | Controller |
| Item Weight | 2.5 kg |
| Item Height | 16 cm |
| Item Width | 13 cm |
| Item Length | 24 cm |
| Material | Aluminum |
| Rated Current | 200A |
| Peak Current | 600A |
| Boost Current | 250A |
| Rated Voltage | 72V |
| Max. Efficiency | 18000W (>=92%) |
| Net Weight | 2.44 kg |
| Waterproof Rating | IP67 |
Default Settings (Example for QS 138 4000W IPM Motor)

| Parameter | Value |
|---|---|
| Motor Model | QS 138 4000W IPM Motor |
| Voltage | 72V |
| Over Voltage | 85.5V |
| Low Voltage | 61V |
| RPM | 6200 |
| Pole pairs | 5 |
| Hall angle | 60° |
| Limiting current | 220A |
| Functions | S mode, R mode, LIN, Temp, Theft prevention, High Brake, Three Speed, CAN BUS, P mode |
4. Setup
Pre-installation Notes
ATTENTION: When placing an order, please provide the matched motor parameters. This allows us to pre-adjust the controller for optimal performance before delivery.
- For hub motors, specify the motor speed, polar number, motor size, and model.
- For mid-drive motors, specify the motor power.
It is highly recommended to match the VOTOL controller with QSMOTOR products, as proper functionality with other brands may not be guaranteed.
Physical Installation
The controller should be mounted securely in a location that allows for adequate airflow for heat dissipation. Refer to the technical drawing for dimensions to ensure proper fitment.

Wiring
The EM200-2sp uses a TE 770680-1 plug-in connector for its wiring harness. The included function cable provides connections for various operational modes and sensors.

Key connections include:
- High Brake: For high-level braking input.
- P mode: Parking mode or specific power mode.
- Mode (1,2,3): Multi-speed or mode selection.
- R mode: Reverse mode.
- S mode: Sport mode or specific power mode.
- LIN: Local Interconnect Network communication.
- Throttle: Accelerator input.
- Hall Sensor: Motor position feedback.
- E-lock: Electronic lock function.
- Program Debugging: Connection point for the USB programmable cable.
For a detailed wiring manual, please contact our online service.
Software Setup
To configure and debug the controller, you will need the dedicated software. Please contact sales to obtain the link and password for downloading the manuals and software. This can be done before or after receiving your controller.

5. Operating Instructions
The VOTOL EM200-2sp controller is fully programmable, allowing for fine-tuning of motor parameters to suit specific applications and rider preferences. Once the controller is wired and connected to your motor, use the provided USB programmable cable and software to access the settings.

The software interface allows you to adjust parameters such as voltage limits, current limits, RPM, Hall angle, and to enable or disable various functions like S mode, R mode, LIN, Temperature protection, Theft prevention, High Brake, Three Speed, CAN BUS, and P mode. Refer to the software manual for detailed instructions on each parameter and function.
After making any changes in the software, ensure you save the parameters to the controller and test the vehicle's operation in a safe environment.
6. Maintenance
The EM200-2sp controller features an IP67 waterproof rating, providing excellent protection against dust and water ingress. However, regular maintenance is still recommended to ensure longevity and optimal performance:
- Regular Inspection: Periodically check all wiring connections for tightness and signs of wear or corrosion.
- Cleaning: Keep the controller's exterior clean, especially the heat sink fins, to ensure efficient heat dissipation. Use a soft, dry cloth. Avoid using harsh chemicals or high-pressure water jets directly on the controller.
- Environmental Protection: While waterproof, avoid prolonged submersion or exposure to extreme environmental conditions beyond its rating.
- Software Updates: Check with SiAECOSYS/VOTOL for any available software or firmware updates that may improve performance or add new features.
7. Troubleshooting
Common Issues and Solutions
- Motor Not Responding:
- Check all power connections to the controller and motor.
- Verify that the throttle is correctly connected and calibrated.
- Ensure the E-lock function is not engaged.
- Confirm motor parameters in the software match your motor's specifications. - Erratic Motor Behavior:
- This could indicate incorrect Hall sensor wiring or configuration. Review the wiring diagram and software settings.
- Check for loose or corroded connections in the wiring harness. The AMP connector is designed to minimize bad contacts, but issues can still occur. - Controller Overheating:
- Ensure the controller is mounted in a location with adequate airflow.
- Verify that the motor is not drawing excessive current due to incorrect parameters or a faulty motor.
- Check the ambient temperature; operating in extremely hot conditions can affect performance. - Compatibility Issues with Non-QS Motors:
- If using a motor from a brand other than QS Motor, extensive parameter testing and adjustment via the software may be required. Incompatibility may still occur. - Software Connection Problems:
- Ensure the USB programmable cable is correctly connected to both the controller and your PC.
- Verify that the correct drivers for the USB cable are installed on your computer.
- Try a different USB port or restart your computer.
8. User Tips
- Motor Parameter Matching: Always provide your motor's specific parameters (speed, polar number, size, model for hub motors; power for mid-drive motors) when ordering the controller. This allows for factory pre-adjustment, optimizing performance from the start.
- Recommended Motor Pairing: For best results and compatibility, it is strongly recommended to pair VOTOL controllers with QS Motors.
- Software Access: Obtain the software and manual download links from sales as soon as possible, even before receiving the controller, to familiarize yourself with the programming interface.
- Bluetooth Module: The standard package includes a USB programmable cable. If Bluetooth connectivity is desired, a separate Bluetooth module may be required and should be sourced or inquired about separately, as it is not a standard inclusion.
9. Warranty and Support
SiAECOSYS provides comprehensive support for the VOTOL EM200-2sp controller. This includes:
- Manuals and Software: Access to the latest controller manuals and software for programming and debugging.
- Remote Technical Support: Assistance with setup, programming, and troubleshooting is available remotely.
- Contacting Support: For detailed wiring diagrams, technical inquiries, or support, please contact SiAECOSYS online service or sales team.






