1. Einleitung
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. Hauptmerkmale
- 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.
- Flexible Stromversorgung: 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-Unterstützung: 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.
- Mehrere Konfigurationsmethoden: Konfigurierbar über Host-Software, web Browser- oder Geräteverwaltungsfunktionsbibliothek.
- Robuster Schutz: 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.
- Schienenmontage-Design: Industrial-grade rail design for compact size, easy installation, and cost-effectiveness.
Abbildung 2: Überview 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. Produktparameter
- Modell: 2-Kanal RS485 zu PoE ETH (B)
- Produktart: Serieller Server, Modbus-Gateway, MQTT-Gateway
- Grundfunktion: Bidirektionale transparente Datenübertragung zwischen RS485 und Ethernet
- Kommunikationsschnittstelle: RS485 port × 2, Ethernet port × 2
- Stromversorgung: DC 5.5 power port, 6 ~ 45V DC screw terminal, or PoE port
- Isolationsschutz: Stromisolierung, Signalisolierung
- Ethernet: RJ45 with PoE support, IEEE 802.3af compliant, 10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection
- Serielle Schnittstelle: Isolated RS485 (2 channels, independent receive and transmit)
- Baudrate: 300 ~ 115200 bps
- Paritätsbit: Keine, ungerade, gerade, Markierung, Leerzeichen
- Datenbit: 5 bis 9 Bit
- Flusskontrolle: N / A
- Software Protocols: Ethernet, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS
- Konfiguration: Host software, web Bibliothek für Browser- und Geräteverwaltungsfunktionen
- Kommunikationsmethode: TCP/IP-Direktkommunikation, VCOM
- Betriebsart: TCP-Server, TCP-Client (koexistiert mit einem TCP-Server), UDP, UDP-Multicast
- Betriebstemperatur: -40℃ ~ 85℃
- Luftfeuchtigkeitsbereich: 5 % – 95 % relative Luftfeuchtigkeit
- Abmessungen (L × B × H): 78.0 × 72.5 × 24.2 mm
4. Einrichtung und Anschlüsse
4.1 Stromversorgungsoptionen
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-Anschluss: 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-Verbindungen
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.
- Netzwerk-Kommunikation: 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. Betriebsarten
The converter supports various communication and operating modes to suit different network environments and application requirements.
5.1 Kommunikationsmodi
- TCP-Server: 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-Client: 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. Erweiterte Funktionen
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 Unterstützung des NTP-Protokolls
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 Benutzerdefiniertes Heartbeat-/Registrierungspaket
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 Browser: Zugriff auf das Gerät web interface for configuration, supporting dynamic IP via DHCP and DNS protocol connected domain server address.
- Bibliothek der Geräteverwaltungsfunktionen: 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 Mehrere Schutzmechanismen
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: ÜbergangsvoltagDie TVS-Röhre (TV-Sperrrohr) unterdrückt effektiv die Stoßspannung.tage und vorübergehende Spitzenvolatilitättage im Schaltkreis.
- Rückstellbare Sicherung: Built-in resettable fuse ensures stable output current and prevents over-current conditions.
- Protection Diode: Prevents over-voltage conditions and improves shock resistance.
- ESD-Schutz: 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 Schnittstellenlayout
The device features the following interfaces:
- Gleichstromanschluss: 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.
- Reset-Taste: For factory reset or rebooting the device.
- Gleichstromeingang 6-36V: Screw terminals for direct DC power input.
8.2 Indikatorbeschreibung
The front panel includes several LED indicators to show the device's status:
- DWR: Power indicator. Lit when the device is powered on.
- NETTO: 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.
Abbildung 7: Ausführlich 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. Umrissmaße
The physical dimensions of the Waveshare 2-Ch RS485 to POE Ethernet Converter are as follows:
- Länge: 78.0 mm (3.07 Zoll)
- Breite: 72.5 mm (2.85 Zoll)
- Höhe: 24.2 mm (0.95 Zoll)
Refer to Figure 7 for a detailed diagram of the outline dimensions.
10. Spezifikationen
- Produktabmessungen: 3.07 x 2.85 x 0.95 Zoll
- Artikelgewicht: 4.6 Unzen
- Hersteller: Wellenanteil
- ASIN: B0CCP9MVBV
- Artikelmodellnummer: 2-Kanal RS485 zu PoE ETH (B)
- Marke: Waveshare
- Plattform: Web Browser
- Modellname: 2-Ch RS485 to POE ETH Serial Server
- Hauptstromanschlusstyp: 2.5-mm-Stromanschluss
- Grafikkartenschnittstelle: Integrated (Note: This specification appears to be a generic listing and not directly applicable to this device's function.)
- Verfügbare Speichersteckplätze: 2 (Note: This specification appears to be a generic listing and not directly applicable to this device's function.)
- Anzahl der Ports: 4 (2x RS485, 2x Ethernet)
- Gesamtzahl der Ethernet-Anschlüsse: 2
- UPC: 790885235115
11. Fehlerbehebung
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)
- Überprüfen Sie die Stromquelle: Ensure the DC power adapter or PoE source is correctly connected and supplying the specified voltage (6-45 V Gleichstrom).
- Überprüfen Sie die Verbindungen: 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)
- Ethernet-Kabel prüfen: Ensure the Ethernet cable is properly connected to one of the device's RJ45 ports and to a functional network switch or router.
- Überprüfen Sie die Netzwerkeinstellungen: 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. Wartung
To ensure the longevity and optimal performance of your Waveshare 2-Ch RS485 to POE Ethernet Converter, follow these general maintenance guidelines:
- Sauber halten: Regularly clean the device's exterior with a soft, dry cloth. Avoid using liquid cleaners or solvents.
- Umgebungsbedingungen: 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.
- Sichere Verbindungen: Überprüfen Sie regelmäßig alle Kabelverbindungen (Strom, Ethernet, RS485), um sicherzustellen, dass sie fest sitzen und unbeschädigt sind.
- Firmware-Updates: Überprüfen Sie die Angaben des Herstellers website for any available firmware updates. Applying updates can improve performance, add features, or resolve known issues.
13. Technischer Support
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 auf Amazon oder ihr Beamter webWebsite.
