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4-Port Industrial Secure Modbus TCP/RTU/ASCII Gateway with Optional 3kV isolation, DIN-rail mount, dual power input, wide-temperature



Industrial 4-Port Modbus Gateway, 100/1000BASE-X with SFP Slot, DB9

0 products currently in stock.

The stock was last updated at 11:40 am Friday, 17 May, 2024. Please contact us for lead times if needed.

Series Description

Diverse Hardware Infrastructure
Modbus Gateway supports the four most commonly used communication standards, RS-232/485/422, and Ethernet. The ease-of use configuration utility provided with Modbus Gateway can quickly select the hardware  interface , and easily switch to the existing communication infrastructure. Industrial EMC protection and wide temperature operation capability make MB5904D ready for every mission. And if cabling is an issue, the PoE-powered version can allow MB5904D to be powered through PoE.

Advanced embedded security and advanced features
Relax. MB5904D Modbus Gateway supports OpenVPN and IPsec VPN encryption, allowing you to safely use the device over the internet without worrying about malicious attacks, data sniffing or unintentional remote control of your Modbus slaves. On your LAN, RSTP protocol will provide an additional layer of security in case of link losses.

Switching between Modbus Protocols
Modbus Gateway supports the standard Modbus protocol and is capable of converting any Modbus protocols between Modbus TCP, Modbus RTU, and Modbus ASCII for all supported hardware interfaces. All of this, in bidirectional mode: Ethernet and Serial ends can selected to be either master or slave Modbus ID Routing. Modbus Gateway supports various types of hardware communication interfaces, Modbus protocol conversion, and Modbus ID routing. Therefore the Modbus Gateway can integrate your existing and complex Modbus hardware configuration into a simple network that can be easily managed.

Additional information



PoE standard supported

LAN Mode

Connector ports


, ,



Baud Rate


Data Bits

Stop Bits


USB Ports




Modbus concentrator

Modbus redundant concentrator

Input Voltage

Input Current (@ 12VDC)

Power Consumption

Power Redundancy

Reverse Polarity Protection

Relay Output


Dimension (W x H x D)



Reset Button

Operating Temperature

-40°C~85°C (-40°F~185°F)

Storage Temperature

Ambient Relative Humidity

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Product Brand

ATOP Technologies is a leading brand in the world of online retail, providing a wide range of high-quality electronic products at affordable prices. Delivering ready-made and tailored industrial networking solutions, built to withstand the demands of industry and to meet specific project requirements.

MB5904D Series

The MB5904D-4P-G-DB-SFP is part of a wider series. A series refers to a collection of related products or components designed to work together seamlessly, typically within a specific industry or application. These series often share similar features and functionalities, ensuring compatibility and ease of integration for users.

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Version Name Time Size Download
v1.0 Linux_Driver_x64 2021-03-29 210.16 KB Download
v5.60 Management Utility for Windows 2021-01-18 23.65 MB Download
v5.20 Management Utility for Windows 2016-10-28 16.21 MB Download


Version Name Time Size Download
v1.68c MB59XX Firmware (Download and install this file first if your present firmware version is 1.46 or earlier) 2022-10-27 16.14 MB Download
v1.68 MB59XX Firmware 2022-09-13 16.15 MB Download


Version Name Time Size Download
v1.1 Datasheet EN 2023-11-01 337.85 KB Download
v0.9 Datasheet EN 2020-07-10 687.52 KB Download
v0.8 Datasheet EN 2018-05-18 574.42 KB Download
v0.7 Datasheet EN 2018-05-02 573.98 KB Download


Version Name Time Size Download
v1.4 MB59XX User Manual 2019-11-19 3.76 MB Download
v1.3 MB59XX User Manual 2018-04-17 3.7 MB Download

Hardware Installation Guide

Version Name Time Size Download
v1.1 SE5904D/MB5904D/PG5904D Hardware Installation Guide 2016-03-01 3.81 MB Download

Test reports

Version Name Time Size Download
MB5904D Declarations of Conformity 2023-03-10 290.86 KB Download
Supported Documents & Firmware Last Updated: March 5, 2024