1. Introducción
The Waveshare Industrial Serial Server RS485 to RJ45 Ethernet TCP/IP to Serial Module, Model RS485 TO ETH (B), is an industrial-grade device designed for data acquisition and IoT gateway applications. It integrates multiple functions including serial server, Modbus gateway, MQTT gateway, and RS485 to JSON conversion.
This module features RS485 and Ethernet ports, utilizes screw terminals for power input, and supports a 9~24V wide range power supply. Its rail-mount, flame-retardant case design ensures compact size and ease of installation, making it suitable for various industrial environments such as data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring.

2. Producto terminadoview
The RS485 TO ETH (B) module facilitates bi-directional transparent data transmission between RS485 and Ethernet. It supports various communication modes and protocols for flexible integration into existing systems.

2.1. Key Interfaces
- Puerto RS485: For serial communication with RS485 devices.
- Puerto Ethernet RJ45: For network connectivity (TCP/IP).
- Entrada de energía: Screw terminals for 9~24V DC power supply.
- Indicadores LED: PWR (Power), LINK (Ethernet Link), ACT (Activity).

3. Configuración
3.1. Conexión de hardware
- Fuente de alimentación: Connect a 9~24V DC power supply to the screw terminals (V+ and V-). Ensure correct polarity. A 12V industrial DIN-rail power supply is recommended.
- Conexión Ethernet: Connect the RJ45 Ethernet port to your network switch or router using a standard Ethernet cable.
- Conexión RS485: Connect your RS485 device to the RS485 screw terminals (485A, 485B).

3.2. Rail-Mount Installation
The module is designed for easy installation on a DIN-rail. Simply clip the module onto a standard DIN-rail in your industrial cabinet.

3.3. Configuración inicial
The module can be configured via a host, web browser, or device management functions library. For initial setup, it is often easiest to use a web navegador.
- Connect your computer to the same network as the module.
- Refer to the module's documentation for the default IP address and login credentials.
- Acceda al módulo web interface through a browser to configure network settings (DHCP or static IP), serial port parameters (baud rate, parity, data bits, stop bits), and operating modes.
4. Modos de funcionamiento
The module supports various communication modes to suit different application requirements:
- Servidor TCP: Allows multiple TCP clients to connect to the module and receive data from the serial device.
- Cliente TCP: The module actively connects to a remote TCP server, enabling bi-directional data transfer.
- Modo UDP: Supports UDP server and UDP client for connectionless data transmission.
- Puerta de enlace Modbus: Converts Modbus RTU/ASCII data to Modbus TCP for seamless integration with Modbus TCP networks.
- Puerta de enlace MQTT: Enables serial data upload to MQTT servers for IoT applications.
- RS485 to JSON: Converts RS485 data into JSON format for web-Aplicaciones basadas en.


5. Especificaciones
The following table details the technical specifications of the Waveshare Industrial Serial Server RS485 TO ETH (B) module:
| Categoría | Parámetro | Valor |
|---|---|---|
| General | Tipo de producto | Servidor serie, puerta de enlace Modbus, puerta de enlace MQTT |
| Función básica | Transmisión de datos transparente bidireccional entre RS485 y Ethernet | |
| Número de modelo del artículo | RS485 TO ETH (B) | |
| Interfaces | Interfaz de comunicación | Puerto RS485 x 1, puerto Ethernet x 1 |
| Interfaz del disco duro | Ethernet | |
| Fuerza | Fuente de alimentación | 9 ~ 24V DC screw terminal |
| Tipo de conector de alimentación principal | Terminales de tornillo | |
| Protección | Protección de aislamiento | N/C (Not applicable for this version) |
| Ethernet | Ethernet | Conector RJ45 de negociación automática de 10/100 M |
| De serie | Puerto serie | RS485 |
| velocidad de transmisión | 300 ~ 115200 bps | |
| Bit de paridad | ninguno, impar, par, marca, espacio | |
| Bit de datos | 5 ~ 9 bits | |
| Software | Protocolo | Ethernet, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS |
| Configuración | anfitrión, web navegador, biblioteca de funciones de gestión de dispositivos | |
| Método de comunicación | Comunicación directa TCP/IP, VCOM | |
| Modo de funcionamiento | Servidor TCP, cliente TCP (coexistente con el servidor TCP), UDP, multidifusión UDP | |
| Ambiente | Temperatura de funcionamiento | -40°C ~ 85°C |
| Temperatura de almacenamiento | -40°C ~ 100°C | |
| Rango de humedad | 5% ~ 95% de humedad relativa | |
| Físico | Dimensiones (L×An×Al) | 87 × 36 × 59 mm |

6. Mantenimiento
- Limpieza: Use a soft, dry cloth to clean the module. Avoid using liquid cleaners or solvents.
- Condiciones ambientales: Ensure the module operates within the specified temperature and humidity ranges to prevent damage and ensure optimal performance.
- Actualizaciones de firmware: Consulte periódicamente el sitio web oficial de Waveshare. website for firmware updates to enhance functionality and security.
7. Solución de problemas
- Sin energía (LED PWR apagado): Verify the power supply connection and ensure the voltage is within the 9~24V DC range.
- No Network Link (LINK LED off): Check the Ethernet cable connection to the router/switch. Ensure the network device is powered on and functioning correctly.
- Sin transmisión de datos:
- Confirm serial port parameters (baud rate, parity, data bits, stop bits) match the connected RS485 device.
- Verify network settings (IP address, gateway, DNS) are correctly configured.
- Check the operating mode (TCP Server/Client, UDP) and ensure it aligns with your application.
- Ensure the RS485 wiring (A/B) is correct.
- Módulo que no responde: Try restarting the module by cycling its power. If the issue persists, perform a factory reset (refer to the full user manual for instructions on how to perform a factory reset).
8. Garantía y soporte
Waveshare products typically come with a standard manufacturer's warranty. For specific warranty details, technical support, or further assistance, please refer to the official Waveshare websitio o comuníquese directamente con su servicio de atención al cliente.
Additional resources, including detailed user manuals, software tools, and FAQs, can be found on the Waveshare product page for the RS485 TO ETH (B) module.





