RS232/485/422 to RJ45 Ethernet Module

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Rail-Mount Serial Server, RS232/485/422 To RJ45 Ethernet Module, TCP/IP To Serial. This is the variant with POE Function.

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SKU: 9967 Category:


RS232 / 485 / 422 To RJ45 Ethernet Module

Industrial Isolated, Rail-mount RS232/485/422 Serial Server


Features At A Glance

This is a RS232/485/422 device data acquisitor / IoT gateway designed for industrial environment. It combines multi functions in one, including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc. The module features RS232/485/422 and Ethernet port (PoE function optional), uses DC port (outer diameter: 5.5mm, inner diameter: 2.1mm) and screw terminals for power input. The case with rail-mount support, small in size, easy to install, cost-effective. It is suitable for applications like data acquisition, IoT gateway, safety & security IoT, and intelligent instrument monitoring…

Version Option

RS232/485/422 TO POE ETH (B)
PoE network port + Electrical isolation



Common network portPoE network port + Electrical isolationMulti interfaces + common network port + Electrical isolationMulti interfaces + PoE network port + Electrical isolation
Product TypeSerial server, Modbus Gateway, MQTT Gateway
Basic FunctionBi-directional transparent data transmission between RS485 and EthernetBi-directional transparent data transmission between RS232/485/422 and Ethernet
Communication interfaceRS485 port × 1, Ethernet port × 1RS232 port × 1; RS485 port × 1; RS422 port × 1; Ethernet port × 1
Power supply9 ~ 24V DC screw terminal6 ~ 36V DC screw terminal, or PoE portDC power port, 6 ~ 36V DC screw terminalDC power port, 6 ~ 36V DC screw terminal, or PoE port
Isolation ProtectionN/CPower isolation, Signal isolation
Ethernetcommon network portPoE network port, support IEEE 802.3af standardcommon network portPoE network port, support IEEE 802.3af standard
10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection
Serial portRS485Isolated RS485Isolated RS232/485/422
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: 87 × 36 × 59 mmL × W × H: 88.7 × 72.5 × 24.2 mm

Primary Function

Bi-Directional Transparent Data Transmission Between RS232/485/422 And Ethernet


Three Different Interfaces

Onboard RS232 / 485 / 422 Interfaces, Suitable For More Application Scenarios

Ethernet Port To RS232/485/422

The Ethernet Port Can Send Data To Three Serial Ports At The Same Time

RS232 / 485 / 422 To Ethernet Port

Only One Of The RS232, RS485, And RS422 Can Send Data To The Ethernet Port At The Same Time


Multi Methods For Power Supply

Support PoE Ethernet Port Power Supply*, Suitable For IEEE 802.3af PoE Standard
Support Screw Terminal And DC Power Port For Power Supply, DC 6~36V
Wide Voltage Range Input

* This function is only available on the PoE version

Rail-Mount Support

Easy To Combine Multi Rail-Mounted Serial Server Together, More Freely

Modbus Gateway Support

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

Multi Communication Modes

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



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

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

Outline Dimensions

Support Batch Customization

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

Additional information

Weight150 g
Manufacturer Product NumberRS232/485/422 TO POE ETH (B)
Country of OriginCN
HS Tariff Code8486204900


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