1. Введение
The Waveshare 2-Ch RS485 to POE Ethernet Converter is an industrial-grade isolated serial server designed for reliable data transmission. This device facilitates bi-directional transparent data communication between RS485 serial devices and an Ethernet network. It features dual independent RS485 channels and dual Power over Ethernet (PoE) enabled Ethernet ports, making it suitable for various industrial applications including Modbus and MQTT gateway functionalities.
Figure 1: Waveshare 2-Ch RS485 to POE Ethernet Converter. This image shows the compact, rail-mount metal case of the device with its various indicator LEDs and the green terminal block for RS485 connections.
2.Основные характеристики
- Dual Ethernet Port Cascade: Onboard 2-channel Ethernet ports for communication and cascading. Either port can be used for dual serial server network communication, while the other can be used for cascading or communication with other devices.
- Гибкий источник питания: Supports screw terminal (DC 6~45V) and DC power port, or Power over Ethernet (PoE) via the Ethernet port, compliant with IEEE 802.3af.
- Modbus Gateway Support: Suitable for Modbus networking upgrades, configurable with specific software. Supports TCP server / TCP client / UDP multicast / UDP modes.
- MQTT/JSON to Modbus: Offers flexible conversion between different protocols for enhanced data integration.
- Multi-Host Roll-Polling: Supports multiple hosts for data acquisition.
- User-Defined Heartbeat/Registration Packet: Customizable packets for cloud communication and device identification.
- NTP Protocol Support: Enables synchronization of network time for serial data output or upload.
- Multiple Configuration Methods: Configurable via host software, web browser, or device management functions library.
- Надежная защита: Onboard power supply and signal isolation, built-in TVS, resettable fuse, and protection diode for stable and safe operation against surge, over-current, and over-voltage.
- Конструкция для монтажа на направляющую: Industrial-grade rail design for compact size, easy installation, and cost-effectiveness.
Рисунок 2: Болееview of the key features of the Waveshare 2-Ch RS485 to POE Ethernet Converter, highlighting industrial isolation, rail-mount capability, Modbus/MQTT/JSON gateway support, dual RS485 channels, multiple power options, and Ethernet port cascade.
3. Параметры продукта
- Модель: 2-CH RS485 TO POE ETH (B)
- Тип продукта: Последовательный сервер, шлюз Modbus, шлюз MQTT
- Основная функция: Двунаправленная прозрачная передача данных между RS485 и Ethernet.
- Интерфейс связи: RS485 port × 2, Ethernet port × 2
- Источник питания: DC 5.5 power port, 6 ~ 45V DC screw terminal, or PoE port
- Изоляционная защита: Power isolation, Signal isolation
- Ethernet: RJ45 with PoE support, IEEE 802.3af compliant, 10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection
- Последовательный порт: Isolated RS485 (2 channels, independent receive and transmit)
- Скорость передачи данных: 300 ~ 115200 бит / с
- Бит четности: None, odd, even, mark, space
- Бит данных: 5–9 бит
- Управление потоком: Н/Д
- Software Protocols: Ethernet, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS
- Конфигурация: Host software, web библиотека функций управления браузером и устройством
- Способ связи: Прямая связь TCP/IP, VCOM
- Режим работы: TCP-сервер, TCP-клиент (сосуществующий с TCP-сервером), UDP, UDP-многоадресная рассылка
- Рабочая температура: -40℃ ~ 85℃
- Диапазон влажности: Относительная влажность 5% ~ 95%
- Размеры (Д × Ш × В): 78.0 × 72.5 × 24.2 мм
4. Настройка и подключение
4.1 Варианты электропитания
The device offers multiple ways to receive power:
- DC 5.5 Power Port: Connect a compatible DC power adapter to the 5.5mm power jack.
- DC Screw Terminal: Use the screw terminal block for a DC input voltage range of 6V to 45V. Ensure correct polarity.
- PoE порт: If using a PoE-enabled Ethernet switch or injector, power can be supplied directly through the Ethernet cable, compliant with IEEE 802.3af.
4.2 Подключения Ethernet
The converter features two RJ45 Ethernet ports (ETH1 and ETH2) that support 10/100M auto-negotiation and 2 KV surge protection. These ports can be used for network communication or for cascading multiple devices.
- Сетевые коммуникации: Connect either ETH1 or ETH2 to your local area network (LAN) or directly to a computer.
- Ethernet Port Cascade: One Ethernet port can be used for network communication, while the other can be used to connect to another device, allowing for a cascaded setup. Each module in a cascade needs to be powered individually. The working current of the module is 12V/150mA (MAX), and up to 8 modules can be cascaded.
4.3 RS485 Connections
The device includes two isolated RS485 channels. Connect your RS485 serial devices to the green screw terminal block. Ensure proper A/B line connections for each channel.
Figure 3: Connection diagrams for the Waveshare 2-Ch RS485 to POE Ethernet Converter, illustrating primary function, Ethernet port cascade, multi-power supply options (DC 5.5 port, screw terminal, PoE), and rail-mount support.
5. Режимы работы
The converter supports various communication and operating modes to suit different network environments and application requirements.
5.1 Режимы связи
- TCP-сервер: The device listens on configured ports and waits for TCP client connections. Data from the serial device is then transparently transmitted to all connected TCP clients. Supports up to 30 concurrent TCP connections.
- TCP-клиент: The device actively establishes a TCP connection with a configured IP address and port. It can coexist with TCP server mode and supports up to 22 concurrent client connections.
- UDP-протокол: Data is transmitted via UDP packets to a specified IP address and port, improving data transfer accuracy.
- UDP Multicast: Data is sent to a multicast group. Only devices within the multicast group receive the data, reducing network load.
5.2 Шлюз Modbus
The device functions as a Modbus gateway, enabling Modbus RTU devices to communicate over a Modbus TCP/IP network. This is suitable for upgrading existing Modbus networks. Configuration is performed using specific software.
5.3 MQTT/JSON to Modbus
When configured as an MQTT gateway, the device can upload serial data to an MQTT server via MQTT protocol. It supports transparent transmission, encrypted communication, and various cloud platforms (e.g., Baidu Cloud MQTT, Alibaba Cloud MQTT, China Mobile OneNet). The acquired Modbus RTU or non-standard serial data can be parsed into JSON format and packaged into MQTT data packets for uploading. When used as a JSON data acquisition gateway, devices can be connected to data acquisition instruments through RS485 connection. The device then acquires data automatically, converts it into JSON format, and posts it to a server. The acquired data supports Modbus RTU 645 instrument 97 version, 645 instrument 07 version, as well as non-standard RS485 protocols. The uploaded data format can be configured via host, and the JSON upload protocol can be MQTT protocol, HTTP POST protocol, HTTP GET protocol, and so on.
Figure 4: Detailed illustration of Modbus Gateway support, MQTT/JSON to Modbus conversion, and various communication modes including TCP Server, TCP Client, UDP Multicast, and UDP Mode.
6. Расширенные функции
6.1 Multi-Hosts Roll-Polling Support
The device supports roll-polling from multiple hosts. Different network devices will be identified and responded to respectively, preventing crosstalk issues while communicating with multiple network devices.
6.2 NTP Protocol Support
The converter supports the Network Time Protocol (NTP) for obtaining network time information. This ensures accurate timestamps for serial data output or data uploads, which is crucial for data logging and synchronization.
6.3 User-Defined Heartbeat/Registration Packet
Users can define custom heartbeat and registration packets. These packets are essential for cloud communication and device identification, allowing for flexible integration into various IoT platforms and monitoring systems.
6.4 Multi-Configuration Methods
The device offers several methods for configuration:
- Host Software: Utilize dedicated software for comprehensive configuration.
- Web Браузер: Получите доступ к устройству web interface for configuration, supporting dynamic IP via DHCP and DNS protocol connected domain server address.
- Device Management Functions Library: Integrate configuration into custom applications using the provided library.
Figure 5: Visual representation of advanced features including multi-host roll-polling, NTP protocol support for time synchronization, user-defined heartbeat/registration packets for device identification, and various configuration methods.
7. Physical Characteristics and Protection
7.1 Aluminium Alloy Enclosure
The converter is housed in a solid and durable aluminium alloy enclosure with sandblasting and anodic oxidation treatment. This provides excellent physical protection and heat dissipation, ensuring reliable operation in industrial environments.
7.2 Множественные механизмы защиты
For enhanced safety and stability, the device incorporates several protection features:
- Power Supply and Signal Isolation: Provides stable isolation voltage with high reliability and strong anti-interference capabilities.
- Built-in TVS: переходный объемtage Suppression (TVS) tube effectively suppresses surge voltage and transient peak voltagе в цепи.
- Сбрасываемый предохранитель: Built-in resettable fuse ensures stable output current and prevents over-current conditions.
- Protection Diode: Prevents over-voltage conditions and improves shock resistance.
- Защита от электростатического разряда: Electrostatic Discharge protection safeguards the device from static electricity.
Figure 6: Illustration of the multiple protection features and the robust aluminium alloy enclosure of the Waveshare 2-Ch RS485 to POE Ethernet Converter, emphasizing its industrial design.
8. Interface Introduction and Indicators
8.1 Внешний вид интерфейса
The device features the following interfaces:
- Порт питания постоянного тока: 5.5mm jack for external DC power supply.
- Ethernet Ports (ETH1, ETH2): RJ45 connectors for network and PoE (optional) connections.
- RS485 Screw Terminals: Two independent channels (RS485-1 and RS485-2) with A, B, GND, VCC connections.
- Кнопка сброса: For factory reset or rebooting the device.
- Входное напряжение постоянного тока 6-36 В: Screw terminals for direct DC power input.
8.2 Описание индикатора
The front panel includes several LED indicators to show the device's status:
- мощность: Индикатор питания. Горит, когда устройство включено.
- СЕТЬ: Network indicator. Blinks when connected to Ethernet.
- LINK1: Lights up when Channel 1 connection is established.
- ACT1: Lights up when Channel 1 is transmitting data.
- LINK2: Lights up when Channel 2 connection is established.
- ACT2: Lights up when Channel 2 is transmitting data.
Рисунок 7: Подробная информация view of the device's interfaces, including DC power, Ethernet ports, RS485 terminals, and reset button. Also shows the indicator LED descriptions and outline dimensions.
9. Габаритные размеры
The physical dimensions of the Waveshare 2-Ch RS485 to POE Ethernet Converter are as follows:
- Длина: 78.0 мм (3.07 дюйма)
- Ширина: 72.5 мм (2.85 дюйма)
- Высота: 24.2 мм (0.95 дюйма)
Refer to Figure 7 for a detailed diagram of the outline dimensions.
10. Технические характеристики
- Размеры продукта: 3.07 x 2.85 x 0.95 дюйма
- Вес товара: 4.6 унции
- Производитель: Waveshare
- ASIN: B0CCP9MVBV
- Номер модели товара: 2-CH RS485 TO POE ETH (B)
- Бренд: волновой раздел
- Платформа: Web Браузер
- Название модели: 2-Ch RS485 to POE ETH Serial Server
- Тип разъема основного питания: Разъем питания 2.5 мм
- Интерфейс видеокарты: Integrated (Note: This specification appears to be a generic listing and not directly applicable to this device's function.)
- Доступные слоты памяти: 2 (Note: This specification appears to be a generic listing and not directly applicable to this device's function.)
- Количество портов: 4 (2x RS485, 2x Ethernet)
- Общее количество портов Ethernet: 2
- СКП: 790885235115
11. Поиск Неисправностей
This section provides general guidance for common issues. For specific technical problems, refer to the support section.
11.1 No Power Indicator (PWR LED Off)
- Проверьте источник питания: Ensure the DC power adapter or PoE source is correctly connected and supplying the specified voltagе (6-45 В постоянного тока).
- Проверьте соединения: Confirm that power cables are securely attached to the DC jack or screw terminal. If using PoE, ensure the Ethernet cable is connected to a PoE-enabled port.
11.2 No Network Connectivity (NET LED Off/Not Blinking)
- Проверьте кабель Ethernet: Ensure the Ethernet cable is properly connected to one of the device's RJ45 ports and to a functional network switch or router.
- Проверьте настройки сети: Confirm that the device's IP address, subnet mask, and gateway settings are correct and compatible with your network. If using DHCP, ensure a DHCP server is available.
- Проверка с использованием другого порта/кабеля: Try connecting to a different Ethernet port on the device or using a different Ethernet cable.
11.3 No RS485 Data Transmission (ACT LEDs Off)
- Verify RS485 Wiring: Ensure the A and B lines of your RS485 device are correctly connected to the corresponding A and B terminals on the converter.
- Check Serial Parameters: Confirm that the baud rate, parity, data bits, and stop bits configured on the converter match those of your RS485 serial device.
- Test RS485 Device: Ensure the connected RS485 device is functional and actively transmitting/receiving data.
12. Техническое обслуживание
To ensure the longevity and optimal performance of your Waveshare 2-Ch RS485 to POE Ethernet Converter, follow these general maintenance guidelines:
- Содержать в чистоте: Regularly clean the device's exterior with a soft, dry cloth. Avoid using liquid cleaners or solvents.
- Условия окружающей среды: Operate the device within the specified temperature (-40℃ ~ 85℃) and humidity (5% ~ 95% RH) ranges. Avoid exposure to extreme conditions, direct sunlight, or excessive dust.
- Безопасные соединения: Periodically check all cable connections (power, Ethernet, RS485) to ensure they are secure and free from damage.
- Обновления прошивки: Проверьте производителя website for any available firmware updates. Applying updates can improve performance, add features, or resolve known issues.
13. Техническая поддержка
Waveshare provides online development resources and technical support for this product. If you encounter any problems or require assistance with setup, configuration, or troubleshooting, please do not hesitate to contact Waveshare support.
For further information and resources, please visit the Магазин Waveshare на Amazon или их официальный представитель webсайт.
