Industrial serial server (B) RS485 to RJ45 PoE Ethernet


Download RS485 to RJ45 PoE ETH User Guide and Resources

Introducing the RS485 to POE ETH (B) – a cutting-edge device to boast a PoE Ethernet port with power and signal isolation protection, ensuring unparalleled safety for even the most demanding applications such as:

  • IoT gateway for communication between devices and the cloud
  • Power, smart meter, and energy monitoring
  • Remote monitoring and program download of various automation PLCs
  • Configuration of software and equipment communication interfaces
  • Access control security field equipment networking

With the RS485 to POE ETH (B), you can transform your IoT gateway into a powerful communication bridge between devices and the cloud. Monitor power, smart meter, and energy usage with ease, and remotely program various automation PLCs for seamless integration into your industrial processes.

But that's not all – this serial server also features various configuration software and equipment communication interfaces, making it the perfect choice for access control security field equipment networking.

Transparent Bi-Directional Data Transmission between Ethernet and RS485

Supports Rail Mounting – You Can Mount Multiple Servers Together

Modbus Gateway Support

Ideal for Modbus Gridding Upgrade – Also supports 3D configuration software

Compatible with TCP Server, UDP Mode, TCP Client, and UDP Multicast Communication Modes

MQTT / JSON to Modbus

Flexible Conversion between Protocols

The device can be used as an MQTT gateway or JSON data acquisition gateway.

As an MQTT gateway, the device enables devices to upload serial data to an MQTT server through transparent transmission using the MQTT protocol. The supported servers include Baidu Cloud MQTT, Alibaba Cloud MQTT, China Mobile OneNet, and others. The device can parse acquired Modbus RTU or non-standard serial data into JSON format and package it into MQTT data packets for uploading.

As a JSON data acquisition gateway, the device can be connected to data acquisition instruments through RS485 connection to automatically acquire data, convert it into JSON format, and post it to a server. The acquired data supports Modbus RTU 645 instrument 97 version, 645 instrument 07 version, as well as various non-standard RS485 protocols. The host can configure the format of the uploaded data, and the JSON upload protocol can be MQTT protocol, HTTP POST protocol, HTTP GET protocol, and others.

Multi Hosts Roll-Polling Support

  • Identifies network devices and responds accordingly.
  • No more crosstalk problems during communication with multi-network devices.

User-Defined Heartbeat / Registration Packet

Makes device identification and cloud communication much easier.

Supports NTP Protocol

Gets network time information for data upload or serial output.

Multiple Configuration Methods

  • Web browser configuration support
  • DNS protocol connection with domain server address
  • Obtain dynamic IP through DHCP

Interface Layout

Outline Dimensions


  • Product Type: Serial Server, MQTT Gateway, Modbus Gateway
  • Primary Function: Bi-directional data transmission between Ethernet and RS485
  • Communication Interface: Ethernet Port (x1) | RS485 Port (x1)
  • Power Supply: PoE port or Screw Terminal 6V ~ 36V DC compatible
  • Isolation Protection: Signal Isolation | Power Isolation
  • Ethernet: PoE Network Port | IEEE 802.3af standard | RJ45 connector 10M/100M auto-negotiation | 2KV surge protection
  • Serial Port: Isolated RS485
  • Baudrate: 300 bps ~ 115200 bps
  • Parity bit: Space, Mark, Even, Odd, None
  • Data bit: 5bit, 6bit, 7bit, 8bit, 9bit
  • Protocol Support: DNS, DHCP, ICMP, ARP, HTTP, UDP, TCP, IP, ETHERNET
  • Communication Method: TCP / IP direction communication | VCOM
  • Configuration: Web browser, host, device management functions library
  • Operating Mode: TCP Server, UDP multicast, UDP, TCP client (in integration with TCP server)
  • Storage Temperature: -40oC ~ 100oC
  • Operating Temperature: -40oC ~ 85oC
  • Operating Humidity: 5% ~ 95% RH
  • Dimensions: 87mm x 36mm x 59mm

Items Included

  • RS485 to PoE ETH (B)

Package Weight: 77 Grams

Power supply is NOT included.

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