4-Ch RS485 to RJ45 Ethernet Serial Server

  • 599 kr

4-Ch RS485 To RJ45 Ethernet Serial Server, 4 Channels RS485 Independent Operation, Rail-Mount Industrial Isolated Serial Module, Bi-Directional Transparent Tran

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Artikelnummer: 26360

4-Ch RS485 To RJ45 Ethernet Serial Server, 4 Channels RS485 Independent Operation, Rail-Mount Industrial Isolated Serial Module, Bi-Directional Transparent Transmission, Modbus Gateway, Optional PoE Function, Industrial Isolated 4-Ch RS485 To RJ45 Ethernet Serial Server, 4-Ch RS485 to Ethernet, Modbus/MQTT/JSON Support, Rail-mount Metal Case.


Features At A Glance

This is a multi-functional device data acquisitor / IoT gateway with 4-ch RS485 and an Ethernet port (PoE version optional), small in size, easy to install, and cost-effective. It is suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring, meeting various application scenarios.

  • 4-ch RS485 can work independently without affecting each other at the same time, enabling more effective data transmission
  • Combines multiple functions in one, including serial server, Modbus gateway, MQTT gateway, and RS485 to JSON, etc.
  • Adopts screw terminal for stable power input
  • Wall-mount and rail-mount case design, easy to install, for quick deployment and expansion

Version Options

4-CH RS485 TO ETH (B)
4-ch RS485 + Common network port + Electrical isolation


4-ch RS485 + PoE network port + Electrical isolation



4-CH RS485 TO ETH (B)4-CH RS485 TO POE ETH (B)
4-Ch RS485 + Common network port + Electrical isolation4-Ch RS485 + PoE network port + Electrical isolation
Product TypeSerial server, Modbus Gateway, MQTT Gateway
Basic FunctionBi-directional transparent data transmission between RS485 and Ethernet
Communication interfaceRS485 port × 4, Ethernet port × 1
Power supplyDC 6 ~ 45V screw terminalDC 6 ~ 45V screw terminal, or PoE port
Isolation ProtectionPower isolation, Signal isolation
EthernetRJ45RJ45 with PoE support, IEEE 802.3af compliant
10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection
Serial portIsolated RS485 (the 4 channels can receive and transmit independently at the same time)
Baudrate300 ~ 115200 bps
Parity bitnone, odd, even, mark, space
Data bit5 ~ 9 bits
Flow controlN/A
Configurationhost, web browser, device management functions library
Communication methodTCP/IP direct communication, VCOM
Operating modeTCP server, TCP client (coexisting with TCP server), UDP, UDP multicast
Operating temperature-40℃ ~ 85℃
Humidity range5% ~ 95% relative humidity
DimensionsL × W × H: 91.0 × 64.5 × 24.2 mm

Primary Function

Bi-Directional Transparent Data Transmission Between 4-Ch RS485 And Ethernet

Multi Power Supply Options

Support PoE Ethernet Port Power Supply*, Suitable For IEEE 802.3af PoE Standard
Support Screw Terminal For Power Supply, DC 6~45V Wide Voltage Range Input

* This function is only available on the PoE version

Industrial Serial Server

Industrial Rail-Mount Design, Support Wall-Mount And Rail-Mount Installation, Compact Size, Easy Installation, Cost-Effective

Modbus Gateway Support

Suitable For Modbus Networking Upgrade, Can Be Used With Specific Configuration Software

Multi Communication Modes

Supports TCP Server / TCP Client / UDP Multicast / UDP Mode


* Note: This module is 4-channel, and each channel supports the above functions separately


More Flexible Conversion Between Different Protocols

When used as MQTT gateway, the devices can upload serial data to MQTT server by MQTT protocol through transparent transmission, supported servers including Baidu Cloud MQTT, Alibaba Cloud MQTT, China Mobile OneNet, etc. The acquired Modbus RTU or non-standard serial data can be parsed into JSON format and packaged into MQTT data packet for uploading.

When used as JSON data acquisition gateway, the devices can be connected to data acquisition instruments through RS485 connection, then acquire data automatically, convert the data into JSON format, and finally post it to server. The acquired data supports Modbus RTU 645 instrument 97 version, 645 instrument 07 version, as well as sorts of 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.

Multi Hosts Roll-Polling Support

Different Network Devices Will Be Identified And Responsed Respectively,
No More Crosstalk Issue While Communicating With Multi Network Devices

User-Defined Heartbeat/Registration Packet

Easy For Cloud Communication And Device Identification

NTP Protocol Support

Getting Network Time Info For Serial Output Or Data Upload

Multi Configuration Methods

Supports Web Browser Configuration, Obtaining Dynamic IP Via DHCP,
DNS Protocol Connected Domain Server Address

Multiple Protection, Safe And Stable

Onboard power supply and signal isolation, it can provide stable isolation voltage with high reliability and strong anti-interference. Built-in TVS (transient voltage suppression tube) can effectively suppress the surge voltage and transient peak voltage in the circuit, lightningproof & ESD protection. Built-in resettable fuse and protection diode to ensure stable output of current and voltage, prevents over-current and over-voltage proof, improve shock proof performance

Aluminium Alloy Enclosure

Aluminium Alloy Enclosure With Sand Blasting And Anodic Oxidation
Solid And Durable, Fashion And Good Hand Feeling

Interface Introduction

Product Show

* for reference only, please refer to the Package Content for detailed part list

Outline Dimensions

Support Batch Customization

Support Software And Hardware Customization
Including Hardware Interface, LOGO, Label, Case And Web Page, Etc.

Resources & Services

4-CH RS485 TO ETH (B)

Wiki: www.waveshare.com/wiki/4-CH_RS485_TO_POE_ETH_(B)


Wiki: www.waveshare.com/wiki/4-CH_RS485_TO_POE_ETH_(B)

Shipping list 

Weight: 0.023 kg

4-CH RS485 TO ETH (B)

  1. 4-CH RS485 TO ETH (B) x1
  2. Rail-mount buckle x1
  3. Screwdriver x1
  4. Screws pack x1


  1. 4-CH RS485 TO POE ETH (B) x1
  2. Rail-mount buckle x1
  3. Screwdriver x1
  4. Screws pack x1