waveshare USB to RS232/485 Serial Converter Adapter User Manual

1. Введение

This manual provides instructions for the waveshare USB to RS232/485 Serial Converter Adapter. This non-isolated converter facilitates communication between a USB host and RS232 or RS485 devices. It integrates an original FT232RNL chip for enhanced stability and compatibility, along with built-in protection features such as a self-recovering fuse and TVS protection circuit. The device is designed for reliable and safe data transmission.

2.Основные характеристики

• Original FT232RNL Chip: Ensures stable and compatible serial communication.
• Комплексная защита: Features a built-in self-recovering fuse and TVS (Transient Voltage Suppressor) protection circuit for surge and anti-electrostatic capabilities.
• RS232/RS485 Communication Switching: Easily switch between RS232 and RS485 modes via an onboard switch.
• 120Ω Terminal Resistor: Onboard 120Ω balancing resistor for the RS485 interface, configurable via a switch.
• Светодиодные индикаторы: Three LEDs (PWR, TXD, RXD) provide visual status for power and data transmission/reception.
• Совместимость с несколькими ОС: Supports Mac, Linux, Android, and Windows (11/10/8.1/8/7) operating systems.
• Компактный дизайн: Housed in an ABS protection case, offering portability and ease of use.

Рисунок 2.1: Надview of the converter's key features, including the FT232RNL chip, TVS protection, and multi-OS compatibility.

3. Содержимое упаковки

Убедитесь, что все перечисленные ниже предметы включены в ваш пакет:

• USB TO RS232/485 Converter x1
• USB-A male to female cable x1
• Отвертка x1

Рисунок 3.1: Содержимое упаковки продукта.

4. Продукт закончилсяview и интерфейс

The waveshare USB to RS232/485 Serial Converter Adapter features clearly labeled components for easy identification and use.

Рисунок 4.1: Labeled diagram of the USB to RS232/485 converter.

1. 120Ω Resistor Switch: Used to enable or disable the RS485 terminal 120Ω resistor.
2. RS232/485 Switch: Toggles between RS232 and RS485 communication modes.
3. RX_B: RS232 receive data / RS485 differential signal negative B-.
4. TX_A: RS232 transmit data / RS485 differential signal positive A+.
5. Земля: RS232/RS485 signal ground.

The device also includes LED indicators:

• PWR (красный): Lights up when USB connection is established and voltagе обнаружен.
• TXD (Green): Lights up when the USB port sends data.
• RXD (Blue): Lights up when the device port receives data.

5. Технические характеристики

Рисунок 5.1: Comprehensive technical specifications of the converter.

6. Установка драйвера

The waveshare USB to RS232/485 Serial Converter Adapter utilizes the FT232RNL chip, which often has drivers automatically installed by modern operating systems.

• Окна: For Windows 10/11, drivers are typically installed automatically upon connecting the device to a USB port. For older Windows versions (7/8/8.1), or if automatic installation fails, drivers may need to be downloaded from the FTDI website or the waveshare product page.
• Mac/Linux/Android: These operating systems generally include built-in support for FTDI devices, and the converter should function without manual driver installation.

Refer to the official waveshare product page or FTDI website for the latest driver downloads and installation guides if manual intervention is required.

7. Настройка и подключение

Follow these steps to connect and configure your waveshare USB to RS232/485 Serial Converter Adapter.

7.1 Общее подключение

1. Connect the USB-A male end of the converter directly to an available USB port on your computer. Alternatively, use the provided USB-A male to female cable for extended reach.
2. Соблюдайте PWR LED indicator on the converter. It should light up red, indicating power is supplied.

7.2 Подключение RS485

To establish an RS485 communication link:

1. Ensure the RS232/485 switch on the converter is set to the RS485 позиция.
2. Connect the RS485 device to the screw terminals of the converter:
   • Connect the RS485 A+ line of your device to the TX_A terminal on the converter.
   • Connect the RS485 B- line of your device to the RX_B terminal on the converter.
   • Connect the ground (GND) of your device to the Земля terminal on the converter.
3. If your RS485 network requires a terminal resistor, set the 120Ω resistor switch в положение ON.

Рисунок 7.1: RS485 connection diagram.

7.3 Подключение RS232

To establish an RS232 communication link:

1. Ensure the RS232/485 switch on the converter is set to the RS232 позиция.
2. Connect the RS232 device to the screw terminals of the converter. Note that RS232 connections typically involve a crossover:
   • Connect the RS232 TX (Transmit) line of your device to the RX_B terminal on the converter.
   • Connect the RS232 RX (Receive) line of your device to the TX_A terminal on the converter.
   • Connect the ground (GND) of your device to the Земля terminal on the converter.

Рисунок 7.2: RS232 connection diagram.

8. Операция

Once connected, the converter operates by automatically managing data flow between the USB host and the selected serial interface (RS232 or RS485).

• Передача данных: When data is sent from the USB host, the TXD (Green) LED will flash.
• Прием данных: When data is received by the converter from the serial device, the RXD (Blue) LED will flash.
• Выбор режима: Ensure the RS232/485 switch is correctly set for your application.
• RS485 Termination: For RS485 networks, correctly configure the 120Ω terminal resistor based on your network topology.

The converter provides zero-delay automatic transmission and reception conversion, simplifying serial communication.

9. Поиск Неисправностей

• Нет питания (светодиод PWR не горит):
  • Ensure the USB cable is securely connected to both the converter and the computer.
  • Попробуйте использовать другой порт USB на вашем компьютере.
  • Verify the USB port is functional.
• Отсутствует передача/приём данных (светодиоды TXD/RXD не мигают):
  • Check the RS232/485 switch position; it must match the connected device type.
  • Verify the wiring connections to the RS232/RS485 device are correct (TX to RX, RX to TX for RS232; A+ to A+, B- to B- for RS485).
  • Confirm the baud rate and other serial port settings (data bits, parity, stop bits) on your computer match those of the connected serial device.
  • For RS485, check the 120Ω terminal resistor setting.
  • Ensure the correct COM port is selected in your software application.
  • Reinstall or update the FTDI drivers if communication issues persist.
• Устройство не распознается операционной системой:
  • Try connecting the converter to a different USB port or computer.
  • Manually install the FTDI drivers from the manufacturer's webсайт.
  • Проверьте Диспетчер устройств (Windows) или lsusb (Linux) to see if the device is detected.

10. Техническое обслуживание

The waveshare USB to RS232/485 Serial Converter Adapter is designed for low maintenance.

• Уборка: Для чистки внешней поверхности устройства используйте мягкую сухую ткань. Не используйте жидкие чистящие средства или растворители.
• Хранилище: Store the converter in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
• Умение обращаться: Не роняйте устройство и не подвергайте его сильным ударам.

11. Гарантия и поддержка

For information regarding product warranty, technical support, or further assistance, please refer to the official waveshare website or contact their customer service directly. Specific warranty terms and support procedures may vary.