Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional)

$19.99 - $22.99


Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional)
RS485 to RJ45 Ethernet Module

Rail-mount RS485 serial server

Version Options

RS485 TO ETH (B)
Common Ethernet port

PoE Ethernet port + Electrical isolation

These two versions are the same in software functions, while RS485 TO POE ETH (B) is the hardware upgrade version, support PoE Ethernet port power supply, with power and signal isolation protection, which is safer for industrial applications.

Features at a glance

This is an RS485 device data acquisitor / IoT gateway designed for the industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc. The module features RS485 and Ethernet port(POE function is optional), uses screw terminals for power input. Rail-mount case design, small in size, easy to install. It is suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring...

Product RS485 TO ETH (B) RS485 TO POE ETH (B)
Product Type Serial server, Modbus Gateway, MQTT Gateway
Basic Function Bi-directional transparent data transmission between RS485 and Ethernet
Communication interface RS485 port x 1, Ethernet port x 1
Power supply 9 ~ 24V DC screw terminal 6 ~ 36V DC screw terminal, or PoE port
Isolation Protection N/C Power isolation, Signal isolation
Ethernet common network port PoE network port, support IEEE 802.3af standard
10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection
Serial port RS485 Isolated RS485
Serial specification
Baudrate 300 ~ 115200 bps
Parity bit none, odd, even, mark, space
Data bit 5 ~ 9 bits
Flow control N/A
Configuration host, web browser, device management functions library
Communication method TCP/IP direct communication, VCOM
Operating mode TCP server, TCP client (coexisting with TCP server), UDP, UDP multicast
Environment requirement
Operating temperature -40℃ ~ 85℃
Storage temperature -40℃ ~ 100℃
Humidity range 5% ~ 95% relative humidity
Dimensions L × W × H: 87 × 36 × 59 mm

Primary function

bi-directional transparent data transmission between RS485 and Ethernet

Rail-mount support

easy to combine multi rail-mounted serial server together, more freely

Modbus gateway support

suitable for Modbus gridding upgrade, can be used with 3D configuration software

Multi communication modes

supports TCP server / TCP client / UDP mode / UDP multicast

MQTT/JSON to Modbus

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 MQTTdata 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

Interface introduction
* for the power supply range, please refer to the label of the corresponding version.
Outline dimensions
Selection guide
RJ45 Ethernet 10/100Mbps auto-negotiation
POE - supported - supported -
WIFI interface - 802.11b/g/n 2.4GHz -
Type RS485 RS232 RS232/485/422 RS485 RS232+RS485 (allows concurrent operation)
Baudrate 600bps~230.4Kbps 300bps ~ 115.2Kbps 300bps ~ 460.8Kbps 600bps~230.4Kbps
Hardware flow NOT supported supported
Data bit 5, 6, 7, 8
Stop bit 1, 2
Parity bit None, Even, Odd, Space, Mark
Interface protection
Power supply reverse-proof, ESD protection, anti-surge
Ethernet 1.5KV electromagnetic isolation
RS485 2KV ESD protection, 2.2KΩ pull up/down registers 2KV anti-surge 600W anti-surge, lightningproof, anti-electrostatic 15KV anti-surge, lightningproof, over-current protection 2KV ESD protection, 2.2KΩ pull up/down registers
Other - - Power isolation, signal isolation protection - lightningproof, over-current protection
Operating mode
Type TCP Server, TCP Client, UDP Server, UDP Client, etc.
TCP Server customizable 1~16 Clients supports 30 Clients supports 24 Clients supports 2-ch Socket, 8 Clients per ch
Features customized heartbeat packets, customized registration packets, customized webpage, RFC2217-like protocol, KeepAlive, timeout auto reboot, short connection, firmware upgrade via network
- Modbus gateway, MQTT/JSON to Modbus Modbus gateway, MQTT, HTTP Client Modbus gateway, Websocket (webpage to serial)
Configuration Built-in webpage, Host computer config software, Serial commands
Power supply 5~7V 9~24V 6~36V 5~36V
Operating current [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected]
Operating temp. -25~75℃  -40~85℃ 

Quick Overview

The power supply of this product is not included, it is recommended to used with a 12V Industrial DIN-Rail Power Supply
  1. OPTIONS RS485 TO ETH Module x1