1. Introdución
This manual provides detailed instructions for the Waveshare USB to RS485 Converter. This industrial-grade converter is designed for reliable and stable communication between USB and RS485 devices, featuring robust protection circuits and an original FT232RL chip for enhanced compatibility and performance. It is suitable for various industrial control equipment and applications requiring high communication reliability.
Image: The Waveshare USB to RS485 Converter, showcasing its compact design and USB-A connector on one end, and the RS485 screw terminal block on the other. Three indicator LEDs (PWR, TXD, RXD) are visible on the top surface.
2. Contido do paquete
Verifique que todos os elementos que se indican a continuación estean incluídos no seu paquete:
- 1x Waveshare USB to RS485 Converter
- 1x USB-A Male to Female Cable
- 1x Small Screwdriver (for terminal connections)
Image: A visual representation of the package contents, including the USB to RS485 converter, a USB extension cable, and a small screwdriver for wiring the RS485 terminals.
3. Características clave
The Waveshare USB to RS485 Converter incorporates several features for reliable and secure operation:
- USB to RS485 Bidirectional Conversion: Supports seamless two-way data flow.
- Original FT232RL and SP485EEN Chips: Ensures fast communication, stability, reliability, and broad compatibility.
- TVS a bordo (Transient Voltage Suppressor): Effectively suppresses surge voltage e pico transitorio voltage, providing lightningproof and anti-electrostatic protection.
- Onboard Resettable Fuse and Protection Diodes: Guarantees stable current/voltage outputs, offering over-current/over-voltage protection and improved shock resistance.
- 3 indicadores LED: Provides visual feedback for power (PWR) and transceiver status (TXD, RXD).
Image: An infographic summarizing the key features of the converter, including bidirectional conversion, FT232RL/SP485EEN chips, TVS protection, resettable fuse, and LED indicators.
4. Acabado o hardwareview
Understanding the components of your converter is essential for proper use.
4.1 Internal Components and Protection Circuits
Imaxe: Unha explosión view showing the internal components of the converter, highlighting the FT232RL chip, SP485EEN chip, TVS protection circuit, resettable fuse, lightningproof tube, and ESD protection circuit.
4.2 Working Status Indicators
The converter features three LEDs to indicate its operational status:
- PWR (potencia): Lights up red when the device is connected to a USB port and receives power.
- TXD (Transmit Data): Blinks red when data is being transmitted from the USB side to the RS485 side.
- RXD (Receive Data): Blinks red when data is being received from the RS485 side to the USB side.
Image: A diagram illustrating the three LED indicators (PWR, TXD, RXD) and their functions, along with the outline dimensions of the converter in millimeters.
5. Configuración e conexión
Follow these steps to set up and connect your USB to RS485 converter:
- Instalación de controladores: The FT232RL chip typically supports automatic driver installation on most modern operating systems (Windows, macOS, Linux). If drivers are not installed automatically, please refer to the Waveshare product page or FTDI website for specific driver downloads.
- Conexión USB: Connect the USB-A male connector of the converter directly to an available USB port on your computer or host device. The PWR LED should light up red, indicating power.
- Cableado RS485: Use the provided screwdriver to connect your RS485 device to the screw terminal block on the converter. Ensure correct polarity:
- GND: Connect to the ground of your RS485 device.
- A+: Connect to the A+ line of your RS485 device.
- B-: Connect to the B- line of your RS485 device.
- Verificar conexións: Double-check all connections to ensure they are secure and correctly wired.
Image: A diagram illustrating the connection of the USB to RS485 converter to a computer and multiple RS485 devices, highlighting the transmission distance capabilities (up to 1.2km for RS485, 5m for USB) and the recommendation to use repeaters for more than 16 devices.
6. Instrucións de funcionamento
Once connected, the converter operates automatically for data transceiving. The LEDs provide real-time status:
- When your computer sends data to the RS485 device, the TXD O LED parpadeará.
- When the RS485 device sends data back to your computer, the RXD O LED parpadeará.
Ensure your software application is configured to use the correct serial port (COM port) assigned to the USB to RS485 converter by your operating system. The baud rate can range from 300bps to 921600bps, depending on your application requirements.
7. Especificacións
Detailed technical specifications for the Waveshare USB to RS485 Converter:
Image: A table detailing the product specifications, including host port, device port, baudrate, USB and RS485 characteristics, LED indicators, operating environment, and supported operating systems.
| Categoría | Especificación |
|---|---|
| Tipo de produto | Industrial Grade USB to RS485 converter |
| Porto anfitrión | USB |
| Porto do dispositivo | RS485 |
| velocidade en baudios | 300bps - 921600bps |
| Interface USB | |
| Vol. Operativotage | 5V |
| Conector | USB-A |
| Protección | Fusible de autorrecuperación de 200 mA, protección ESD |
| Distancia de transmisión | Uns 5 m |
| Interface RS485 | |
| Conector | Terminal de parafuso |
| Pinos | A+, B-, GND |
| Control de dirección | Hardware automatic control |
| Protección | 600W lightningproof and surge-suppress, 15KV ESD protection (onboard 120R balancing resistor) |
| Distancia de transmisión | About 1.2km (low rate) |
| Modo de transmisión | Point-to-multipoints (up to 32 nodes, repeaters recommended for >16 nodes) |
| Indicadores LED | |
| PWR | Red power indicator, lights up when USB connected and voltage detectado |
| TXD | Red TX indicator, lights up when USB port sends data |
| RXD | Red RX indicator, lights up when device port sends data back |
| Entorno operativo | |
| Temperatura | -15 °C ~ 70 °C |
| Humidade | 5% HR ~ 95% HR |
| Sistema Operativo | Mac, Linux, Android, WinCE, Windows 11 / 10 / 8.1 / 8 / 7 / XP |
8 Solución de problemas
If you encounter issues with your Waveshare USB to RS485 Converter, consider the following:
- No Power (PWR LED off): Ensure the converter is securely plugged into a functional USB port. Try a different USB port or computer.
- No Data Transmission/Reception (TXD/RXD LEDs not blinking):
- Verify that the correct drivers are installed for the FT232RL chip.
- Check the RS485 wiring for correct polarity (A+ to A+, B- to B-, GND to GND) and secure connections.
- Confirm that your software application is configured to use the correct COM port and baud rate.
- Ensure the RS485 device is powered on and functioning correctly.
- For multi-point RS485 networks, check for proper termination resistors and addressing.
- Comunicación intermitente: This could be due to electrical noise. Ensure proper shielding for long RS485 cables and consider using a repeater for distances exceeding 1.2km or for more than 16 devices.
9. Mantemento
The Waveshare USB to RS485 Converter is designed for durability and requires minimal maintenance:
- Manteña o dispositivo limpo e libre de po e humidade.
- Avoid exposing the converter to extreme temperatures or direct sunlight.
- Non intente abrir a casing, as this may void any potential warranty and could damage the internal components.
10. Asistencia e garantía
For technical support, driver downloads, or further inquiries, please visit the official Waveshare website or contact their customer service. Specific warranty information may be available on the product packaging or the Waveshare support portal.
Para obter recursos adicionais, pode visitar o Waveshare Store on Amazon.
