MB5904D Series

MB5904D Series

ATOP MB5904D Series – 4-Port Modbus Gateway w/ 10/100BASE-T(X)



Diverse Hardware Infrastructure
ATOP MB5904D Series 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.


  • Industrial EMC protection, wide temperature operation, -40°C~85°C
  • 2 Fast-Ethernet ports or 100/1000 SFP slots
  • 4 Software-selectable RS-232/RS-485/RS-422 serial ports, up to 921kbps
  • Bi-Directional Modbus TCP/RTU/ASCII conversion from Serial to Ethernet and viceversa, VirtualCOM support, advanced Modbus Options available
  • Isolated Redundant 12~48 VDC Power Inputs or powered (PoE models) through through the Ethernet cable (802.3af)
  • Embedded security with PPTP, IPsec or OpenVPN (client/server)
  • Configuration via Web Browser/ Serial Console/ Telnet Console/ Utility
  • Rugged metal case with wall or DIN-Rail mount

Ordering Information

Part NameArticle NumberDescription
MB5904D-4P-DB 1P1MB5904D0004G Ind. 4-Port Modbus Gateway, 10/100BASET(X), DB9
MB5904D-4P-TB 1P1MB5904D0005G Ind. 4-Port Modbus Gateway, 10/100BASET(X), TB5
MB5904D-4P-Sis 1P1MB5904D0006G Ind. 4-Port Modbus Gw,10/100BASET(X),3kV Isolated
MB5904D-4P-PoE-DB 1P1MB5904D0001G Ind. 4-Port Modbus Gateway,10/100BASET(X) with PoE PD (802.3af), DB9
MB5904D-4P-PoE-TB 1P1MB5904D0002GInd. 4-Port Modbus Gateway,10/100BASET(X) with PoE PD (802.3af), TB5
MB5904D-4P-PoE-Sis 1P1MB5904D0003G Ind. 4-Port Modbus Gateway,10/100BASET(X) with PoE PD (802.3af), TB5, 3kV Serial Isolation
MB5904D-4P-G-DB-SFP 1P1MB5904DG001G Ind. 4-Port Modbus Gateway, 100/1000BASEX SFP Slot, DB9
MB5904D-4P-G-TB-SFP 1P1MB5904DG002GInd. 4-Port Modbus Gateway, 100/1000BASEX SFP Slot, TB5
MB5904D-4P-G-Sis-SFP 1P1MB5904DG003GInd. 4-Port Modbus Gateway, 100/1000BASEX SFP Slot, TB5, 3kV Serial Isolation