Details
Includes a US plug power adapter. Need a different standard? Check out our US and EU options.
RS485 to Ethernet Converter: High-Speed, Low-Power, Rock-Solid Stability, and Easy to Use
* Note: This module does not support Modbus TCP. If you need Modbus TCP functionality, please check out the RS232/485 TO ETH converter.
Overview
The RS485 TO ETH module offers a seamless way to bridge communications between RS485 and RJ45 Ethernet ports. Setup is a breeze thanks to its intuitive, web-based configuration page.
Features
- Powered by a high-performance 32-bit ARM Cortex-M0 processor for lightning-fast speeds and outstanding efficiency
- 10/100M Auto-MDI/MDIX Ethernet port—works seamlessly with both crossover and straight-through cables
- Adjustable RS485 baud rate (600bps~230.4Kbps) with five parity options: None, Odd, Even, Mark, and Space
- Multiple operating modes: TCP Server, TCP Client, UDP Server, UDP Client, and HTTPD Client (supports GET and POST requests)
- Flexible configuration options: Set up via webpage, AT commands, serial protocol, or network protocol. Includes a ready-to-integrate configuration protocol for your custom software
- Supports custom heartbeat packets to verify connection integrity and actively poll sensor data
- Supports custom registration packets—automatically sends device IDs upon connection to easily identify and manage multiple devices
- Customizable web interface—tailor the built-in configuration page to match your needs
- Supports RFC2217-like protocols, allowing real-time adjustment of serial parameters (baud rate, data bits, etc.) on the fly
- Built-in KeepAlive mechanism detects dropped connections and automatically reconnects
- Supports timeout reboot (reboots when no data is detected) to guarantee long-term system stability, with customizable reboot times
- Supports DNS domain name resolution with a customizable DNS server
- Supports DHCP for hassle-free automatic IP allocation, or set a static IP manually
- Easily upgrade firmware directly over the network
- Reset to factory defaults via software or physical hardware pin
- Shipped with a unique default MAC address that can be fully customized
- Bundled utilities included: configuration software, TCP/UDP testing tool, and VCOM virtual serial port software
- Developer-friendly: Includes example code for host computers (socket), VB, C++, Delphi, Android, iOS, and more
Specifications
- Ethernet:
- Connector: 4-pin RJ45
- Communication rate: 10/100Mbps
- Interface protection: 1.5KV electromagnetic isolation
- Protocols: IP, TCP, UDP, ARP, ICMP, DHCP, DNS, HTTPD Client
- TX cache: 6Kbyte
- RX cache: 4Kbyte
- RS485:
- Connector: screw terminal (A+, B-, GND)
- Data bit: 5bit, 6bit, 7bit, 8bit
- Stop bit: 1, 2
- Parity bit: None, Odd, Even, Mark, Space
- Baudrate: 600bps~230.4Kbps
- RX cache: 800byte
- Hardware flow control: none
- Interface protection:
- 2KV ESD protection
- RS485 pull up/down registers: 2.2KΩ
- Power:
- Power supply: 5.0~7.0V (5V recommended)
- Operating current: 150mA (@5V)
- Power consumption: <1W
- Interface protection: reverse-polarity protection, ESD protection, and surge protection
- Environment:
- Operating temperature: -25~75°C
- Storage temperature: -40~105°C
Dimensions
Selection guide
| UART TO ETH | RS485 TO ETH | RS232/485 TO ETH | 2-CH UART TO ETH | |
|---|---|---|---|---|
| microcontroller | Cortex-M0 | Cortex-M0 | Cortex-M4 ((Main frequency up to 120MHz)) | CH9121 |
| Ethernet | 10/100Mbps auto-negotiation RJ45 connector | |||
| Protocol: IP, TCP, UDP, ARP, ICMP, DHCP, DNS, HTTP Client | TCP/UDP | |||
| TX cache: 6Kbyte; RX cache: 4Kbyte |
TX cache: 16Kbyte; RX cache: 16Kbyte |
– | ||
| Serial port | UART | RS485 | RS232 and RS485 | UART |
| Baudrate: 600bps~460.8Kbps | Baudrate: 600bps~230.4Kbps | Baudrate: 300~921.6Kbps | ||
| Hardware flow control: none | Hardware flow control: supported | Hardware flow control: none | ||
| Data bit: 5bit, 6bit, 7bit, 8bit | ||||
| Stop bit: 1, 2 | ||||
| Parity bit: None, Odd, Even, Mark, Space | ||||
| RX cache: 800byte | TX cache: 2Kbyte; 2 cache: 16Kbyte |
– | ||
| Framing mechanism: 4-byte packing time, 400 byte length | Framing mechanism: 4-byte packing time, 1600 byte length, configurable | – | ||
| Featured Function | Customized heartbeat packets, customized registration packets, customized webpage, RFC2217-like protocol, KeepAlive mechanism, time-out reboot, short connection, firmware is upgradable via the network | KeepAlive mechanism, firmware is upgradable via the network | ||
| – | Modbus Gateway, Websocket (Web to serial) | – | ||
| working modes | TCP Server, TCP Client, UDP Server, UDP Client, HTTPD Client | TCP Server, TCP Client, UDP Server, UDP Client | ||
| Supported Clients | For TCP Server, customisable of 1~16 connected Clients | For TCP Server, supports 2-ch Socket, up to 8 Clients per channel | For TCP Server, customisable of 1~8 connected Clients | |
| Configuration | webpage, host software, serial commands | host software, serial commands | ||
| Isolation Protection | Power: reverse-proof, ESD protection, anti-surge | |||
| Ethernet: 1.5KV electromagnetic isolation | ||||
| – | 2KV ESD protection, 2.2KΩ pull up/down registers | – | ||
| – | lightningproof, over-current protection | – | ||
| Power Supply | 3.3V/5V | 5~7V | 5~36V | 3.3V/5V |
| Operating current | 150mA@5V | 110mA@5V | 86.5mA@5V | 140mA@5V |
| Operating temperature | -25~75℃ | -40~85℃ | ||
| Storage temperature | -40~105℃ | -55℃~125℃ | ||
| Dimensions | 50.5 × 22.6 × 15mm | 70 × 63.6 × 25mm | 82.8 × 85.7 × 25mm | 53 × 22mm |











