1. Giới thiệu
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. Các tính năng chính
- 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.
- Nguồn điện linh hoạt: 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.
- Bảo vệ mạnh mẽ: 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.
- Thiết kế gắn ray: Industrial-grade rail design for compact size, easy installation, and cost-effectiveness.
Hình 2: Hếtview 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. Thông số sản phẩm
- Người mẫu: 2-CH RS485 TO POE ETH (B)
- Loại sản phẩm: Máy chủ nối tiếp, Cổng Modbus, Cổng MQTT
- Chức năng cơ bản: Truyền dữ liệu trong suốt hai chiều giữa RS485 và Ethernet
- Giao diện truyền thông: RS485 port × 2, Ethernet port × 2
- Nguồn điện: DC 5.5 power port, 6 ~ 45V DC screw terminal, or PoE port
- Bảo vệ cách ly: Power isolation, Signal isolation
- Mạng Ethernet: RJ45 with PoE support, IEEE 802.3af compliant, 10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection
- Cổng nối tiếp: Isolated RS485 (2 channels, independent receive and transmit)
- Tốc độ truyền: 300 ~ 115200 bps
- Bit chẵn lẻ: None, odd, even, mark, space
- Bit dữ liệu: 5 ~ 9 bit
- Kiểm soát lưu lượng: Không có
- Software Protocols: ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS
- Cấu hình: Host software, web trình duyệt, thư viện chức năng quản lý thiết bị
- Phương thức giao tiếp: Giao tiếp trực tiếp TCP/IP, VCOM
- Chế độ hoạt động: Máy chủ TCP, máy khách TCP (cùng tồn tại với máy chủ TCP), UDP, đaicast UDP
- Nhiệt độ hoạt động: -40℃ ~ 85℃
- Phạm vi độ ẩm: Độ ẩm tương đối 5% ~ 95%
- Kích thước (L × W × H): 78.0 × 72.5 × 24.2mm
4. Thiết lập và kết nối
4.1 Tùy chọn nguồn điện
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.
- Cổng PoE: 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 Ethernet Connections
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.
- Giao tiếp mạng: 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. Chế độ hoạt động
The converter supports various communication and operating modes to suit different network environments and application requirements.
5.1 Chế độ liên lạc
- Máy chủ TCP: 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.
- Máy khách TCP: 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: 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 Modbus Gateway
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. Tính năng nâng cao
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 Trình duyệt: Truy cập của thiết bị 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 Nhiều cơ chế bảo vệ
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: Vol thoáng quatage Suppression (TVS) tube effectively suppresses surge voltage and transient peak voltage trong mạch.
- Cầu chì có thể đặt lại: Built-in resettable fuse ensures stable output current and prevents over-current conditions.
- Protection Diode: Prevents over-voltage conditions and improves shock resistance.
- Bảo vệ ESD: 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 Bố cục giao diện
The device features the following interfaces:
- Cổng nguồn DC: 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.
- Nút Đặt lại: For factory reset or rebooting the device.
- Nguồn điện đầu vào DC 6-36V: Screw terminals for direct DC power input.
8.2 Mô tả chỉ số
The front panel includes several LED indicators to show the device's status:
- LÒ NÒ: Đèn báo nguồn. Sáng khi thiết bị được bật nguồn.
- MẠNG LƯỚI: 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.
Hình 7: Chi tiết 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. Kích thước tổng thể
The physical dimensions of the Waveshare 2-Ch RS485 to POE Ethernet Converter are as follows:
- Chiều dài: 78.0 mm (3.07 inch)
- Chiều rộng: 72.5 mm (2.85 inch)
- Chiều cao: 24.2 mm (0.95 inch)
Refer to Figure 7 for a detailed diagram of the outline dimensions.
10. Thông số kỹ thuật
- Kích thước sản phẩm: 3.07 x 2.85 x 0.95 inch
- Trọng lượng sản phẩm: 4.6 ounce
- Nhà sản xuất: Chia sẻ sóng
- ASIN: B0CCP9MVBV
- Số hiệu sản phẩm: 2-CH RS485 TO POE ETH (B)
- Thương hiệu: waveshare
- Nền tảng: Web Trình duyệt
- Tên mẫu: 2-Ch RS485 to POE ETH Serial Server
- Loại đầu nối nguồn chính: Giắc cắm nguồn 2.5mm
- Giao diện cạc đồ họa: Integrated (Note: This specification appears to be a generic listing and not directly applicable to this device's function.)
- Khe cắm bộ nhớ có sẵn: 2 (Note: This specification appears to be a generic listing and not directly applicable to this device's function.)
- Số cổng: 4 (2x RS485, 2x Ethernet)
- Tổng số cổng Ethernet: 2
- UPC: 790885235115
KHAI THÁC. Xử lý sự cố
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)
- Kiểm tra nguồn điện: Ensure the DC power adapter or PoE source is correctly connected and supplying the specified voltagđiện áp (6-45V DC).
- Xác minh kết nối: 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)
- Kiểm tra cáp Ethernet: Ensure the Ethernet cable is properly connected to one of the device's RJ45 ports and to a functional network switch or router.
- Xác minh cài đặt mạng: 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.
- Test with Another Port/Cable: 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. Bảo trì
To ensure the longevity and optimal performance of your Waveshare 2-Ch RS485 to POE Ethernet Converter, follow these general maintenance guidelines:
- Giữ sạch sẽ: Regularly clean the device's exterior with a soft, dry cloth. Avoid using liquid cleaners or solvents.
- Điều kiện môi trường: 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.
- Kết nối an toàn: Periodically check all cable connections (power, Ethernet, RS485) to ensure they are secure and free from damage.
- Cập nhật chương trình cơ sở: Kiểm tra của nhà sản xuất website for any available firmware updates. Applying updates can improve performance, add features, or resolve known issues.
13. Hỗ trợ kỹ thuật
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 Waveshare Store on Amazon hoặc chính thức của họ webđịa điểm.
