1. Introdução
This manual provides detailed instructions for the installation, operation, and maintenance of the GODIYMODULES Industrial USB to RS485 Converter. This device facilitates communication between a USB-enabled computer and RS485 devices, commonly used in industrial automation, data acquisition, and other serial communication applications. Please read this manual thoroughly before using the product to ensure proper functionality and safety.
Figure 1: GODIYMODULES Industrial USB to RS485 Converter
2. Características
- Supports STC MCU download.
- Adjustable baud rate: 300 to 115200 BPS.
- Includes software for serial port setup and power supply configuration.
- Provides 5V, 200mA current to external devices.
- Signal indication: Red LED for data receiving (RXD).
- Signal indication: Green LED for data transmitting (TXD).
Figure 2: Converter with LED RXD, LED TXD, GND, D-/B-, D+/A+, and 5V labels
3. Especificações
| Atributo | Valor |
|---|---|
| Número do modelo | db620c38-21a9-43cd-90fb-dbaa93129d07 |
| Marca | MÓDULOS GODIY |
| Tipo de conector | USB to RS485 Terminal Block |
| Dispositivos compatíveis | Desktop PCs, PLCs, MCUs, and other RS485 devices |
| Número de portas | 1 (USB) to 1 (RS485) |
| Taxa de transmissão | 300-115200 BPS |
| Volume de saídatage / atual | 5V, 200mA (for external devices) |
| Cor | Green (terminal block) |
| Peso do item | 1.06 onças (aproximadamente 30 gramas) |
| Dimensões da embalagem | 3.94 x 1.98 x 0.79 polegadas (aproximadamente 10 x 5 x 2 cm) |
4. Configuração e instalação
Follow these steps to set up your Industrial USB to RS485 Converter:
- Instalação do driver: Before connecting the converter, install the necessary USB serial port drivers on your computer. These drivers are typically provided on a mini-CD or available for download from the manufacturer's website.
- Conectar ao computador: Plug the USB end of the converter into an available USB port on your computer. The operating system should detect the new hardware and assign a COM port number.
- Identify COM Port: Verify the assigned COM port number through your computer's Device Manager (e.g., "Ports (COM & LPT)").
- Wiring the RS485 Side: Connect your RS485 device to the terminal block of the converter. Ensure correct polarity for D+/A+ and D-/B-. Refer to the connection diagrams below for common configurations.
4.1 Diagramas de Conexão
Figure 3: Point-to-Point / 2-line Half-Duplex Connection (PC1 to single RS485 device)
- Connect the converter's D+/A+ terminal to the RS485 device's 485+ terminal.
- Connect the converter's D-/B- terminal to the RS485 device's 485- terminal.
- O Terra e 5V terminals are optional for power supply to external devices if needed.
Figure 4: Point-to-Multipoint / 2-line Half-Duplex Connection (PC1 to multiple RS485 devices)
- Connect the converter's D+/A+ terminal para o 485+ bus line.
- Connect the converter's D-/B- terminal para o 485- bus line.
- All RS485 devices should be connected in parallel to the same 485+ e 485- bus lines.
- Ensure proper termination resistors are used on the bus if required by your RS485 network.
Figure 5: LX08H to LX08H Half-Duplex Communication
- Conectar D+/A+ of the first converter (PC1) to D+/A+ of the second converter (PC2).
- Conectar D-/B- of the first converter (PC1) to D-/B- of the second converter (PC2).
- This configuration allows two computers to communicate via RS485 using two converters.
5. Operação
Once the converter is physically connected and drivers are installed, you can begin serial communication.
- Configuração de software: Use a serial communication program (e.g., PuTTY, RealTerm, or custom software) to configure the COM port settings. Ensure the baud rate, data bits, parity, and stop bits match those of your RS485 device.
- Transmissão de dados: Send and receive data through the configured COM port. The converter will automatically handle the conversion between USB and RS485 signals.
- Indicadores LED:
- O Red LED (RXD) will flash when the converter is receiving data from the RS485 bus.
- O Green LED (TXD) will flash when the converter is transmitting data to the RS485 bus.
- Fonte de alimentação externa: If your external RS485 device requires power, you can utilize the 5V e Terra terminals on the converter, which provide up to 200mA. Ensure your device's power requirements do not exceed this limit.
6. Manutenção
The GODIYMODULES Industrial USB to RS485 Converter is designed for durability and requires minimal maintenance.
- Limpeza: Mantenha o dispositivo limpo e livre de poeira. Use um pano macio e seco para a limpeza. Evite produtos de limpeza líquidos.
- Armazenar: Quando não estiver em uso, guarde o conversor em local fresco e seco, longe da luz solar direta e de temperaturas extremas.
- Manuseio: Handle the device with care to prevent physical damage to the USB connector or terminal block.
7. Solução De Problemas
| Problema | Possível causa | Solução |
|---|---|---|
| Dispositivo não reconhecido pelo computador. | Drivers ausentes ou incorretos. Porta USB com defeito. | Install the correct drivers. Try a different USB port. Check Device Manager for errors. |
| No data transmission/reception. | Incorrect wiring. Incorrect COM port settings (baud rate, parity, etc.). RS485 device not powered or faulty. | Verify RS485 wiring (D+/A+, D-/B-). Check COM port settings in your software. Ensure the RS485 device is operational. Check LED indicators for activity. |
| Comunicação intermitente. | Loose connections. Electrical noise/interference. Improper termination resistors on RS485 bus. | Secure all connections. Use shielded cables if necessary. Ensure proper RS485 bus termination. |
| Red/Green LEDs not flashing. | No data activity. Device not powered. | Ensure data is being sent/received. Check USB connection. |
8. Garantia e Suporte
For warranty information and technical support, please refer to the documentation provided with your purchase or contact GODIYMODULES customer service through their official website.