1. Introduction
The YANZEO SR681 is a high-performance UHF RFID integrated reader designed for long-range identification applications. It features an 8dBi antenna, providing a reading distance of up to 6 meters. With its IP67 rating, the SR681 is suitable for outdoor and harsh industrial environments, offering reliable performance in various conditions. This manual provides essential information for the proper setup, operation, and maintenance of your SR681 RFID reader.

Figure 1: YANZEO SR681 UHF RFID Reader with power adapter, mounting bracket, and connection cables.
2. Key Features
- Long Reading Range: Equipped with an 8dBi antenna, capable of reading tags up to 6 meters away.
- Robust Design: IP67 rated for water and dust resistance, featuring an ABS+PC material shell for durability in harsh environments.
- Multiple Interfaces: Supports USB, RS485, and Wiegand26/34 output for versatile integration.
- High Performance: Utilizes efficient digital signal processing algorithms for fast label read/write operations and high recognition rates.
- Wide Frequency Range: Operates within 860-960MHz.

Figure 2: Illustration of the SR681's built-in high-gain antenna performance and specifications.

Figure 3: The SR681's IP67 waterproof design, suitable for outdoor use.
3. Setup and Installation
3.1 Physical Installation
The SR681 reader is designed for easy mounting. Use the provided mounting bracket and hardware to secure the reader to a stable surface. Ensure the mounting location allows for optimal signal propagation and is within reach of power and data connections.

Figure 4: Top view of the SR681 showing integrated cables.

Figure 5: Back panel of the SR681 with connection pinout details.
3.2 Electrical Connections
Connect the power adapter to the reader and a suitable power outlet. Utilize the USB, RS485, or Wiegand cables as required for your specific application. Refer to the pinout diagram on the back of the reader (Figure 5) for correct wiring.
- USB: For direct connection to a computer for data transfer and configuration.
- RS485: For industrial control systems and long-distance communication.
- Wiegand26/34: Commonly used for access control systems.
3.3 Software and Driver Installation
For advanced configuration and integration, download the Software Development Kit (SDK) and necessary drivers from the official Yanzeo website: www.yanzeo.com/download. This resource provides tools and documentation for developers.
An installation and debugging video is available for reference: https://youtu.be/ghL1Aj2Jj9M.
4. Operating Instructions
Once powered on and connected, the SR681 reader is ready to detect UHF RFID tags. The reader emits an effective signal in a fan shape, approximately 60°-90° forward, optimizing long-distance identification.

Figure 6: Long-distance identification and effective emission signal area.
4.1 Tag Reading
Position the RFID tags within the reader's effective reading range (up to 6 meters). The reader will automatically detect and process the tag data. The speed and accuracy of reading are enhanced by the reader's efficient digital signal processing algorithm.
4.2 Application Scenarios
The SR681 is versatile and can be deployed in various applications, including but not limited to:
- Vehicle Access Control: Managing entry and exit for vehicles.
- Industrial Production: Tracking assets and processes in manufacturing environments.
- Logistics: Inventory management and tracking goods in warehouses and supply chains.
- Access Management: Controlling personnel access in buildings or restricted areas.
- Garage Management: Automated parking and vehicle identification.

Figure 7: Diverse application scenarios for the SR681 UHF RFID Reader.
5. Maintenance
The YANZEO SR681 is built for durability and requires minimal maintenance. Its IP67 rating ensures protection against dust and water ingress, making it suitable for outdoor and challenging environments.
- Cleaning: Periodically wipe the exterior of the reader with a soft, damp cloth to remove dust and dirt. Avoid using harsh chemicals or abrasive cleaners.
- Environmental Protection: While IP67 rated, avoid prolonged submersion or exposure to extreme temperatures beyond its operating specifications to ensure longevity.
- Cable Inspection: Regularly inspect cables and connectors for any signs of wear or damage. Ensure connections are secure.
6. Troubleshooting
If you encounter issues with your SR681 RFID reader, consider the following common troubleshooting steps:
- No Power: Ensure the power adapter is securely connected to both the reader and a working power outlet.
- Tags Not Reading:
- Verify tags are within the 6-meter reading range.
- Check for obstructions between the reader and the tags.
- Ensure the reader's antenna is oriented correctly towards the tags.
- Confirm the tags are compatible UHF RFID tags (e.g., ISO18000-6C/EPC GEN2, ISO18000-6B).
- Communication Issues:
- Check the integrity of USB, RS485, or Wiegand cables.
- Ensure correct driver installation for USB connections.
- Verify software settings and communication protocols are correctly configured.
For further assistance, refer to the SDK documentation available on the Yanzeo website or contact Yanzeo's professional technical support team.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | Yanzeo |
| Model | SR681 |
| Antenna | 8dBi Integrated Antenna |
| Maximum Range | 6 Meters |
| Working Frequency | 860-960MHz |
| Interfaces | USB, RS485, Wiegand26/34 |
| Ingress Protection (IP) Rating | IP67 |
| Material | ABS+PC |
| Package Dimensions | 15 x 10.24 x 4.17 inches |
| Item Weight | 3.85 pounds |
| Supported Protocols | ISO18000-6C/EPC GEN2, ISO18000-6B |
8. Warranty and Support
The YANZEO SR681 UHF RFID Reader is manufactured in an ISO-9001 quality certified factory, ensuring high quality and reliability. All parts undergo extensive testing by quality control experts.
While specific warranty terms are not detailed in this manual, Yanzeo provides a professional technical support team to assist with any inquiries or issues. For further support, resources, and services, please visit the official Yanzeo website: www.yanzeo.com.





