MB5901B Series

4G LTE Cellular to Ethernet and Serial Secure Modbus Gateway/Router

  • 4G Cellular Protocol Gateway with extensive LTE Band support:
    - EU Model: 2100/1800/850/2600/900/800 MHz (B1/B3/B5/B7/B8/B20)
    - US Model: 1900/1700/850/700/600 MHz (B2/B4/B5/B12/B13/B14/B66/B71)
  • Industrial-grade hardware for operating in harsh environments
  • Wide temperature range for operations at extreme temperatures
  • VPN over IPsec or OpenVPN with throughput up to 37.9Mbps*
  • 1 x 10/100/1000Mbps Ethernet port, 1 x RS-232/485 port, up to 921.6 Kbps
  • Modbus TCP to RTU/ASCII conversion
  • Management via Web Browser, SMS, SNMP v1/v2c/v3
  • 2 Digital Inputs; 2 Digital outputs / Additional RS-232 in I/O version
  • Additional embedded power-bank for fault-relay capability (-B version)
MB5901B Series
MB5901B Series
MB5901B Series
MB5901B Series
MB5901B Series
MB5901B Series
MB5901B Series
MB5901B Series
MB5901B Series
MB5901B Series
MB5901B Series

A compact and rugged 4G Modbus Gateway
Based on ATOP’s Industrial-grade hardware, the MB5901B Series is a cost-effective Modbus Gateway for seamless conversion between Ethernet-based Modbus TCP and serial-based Modbus RTU/ASCII for demanding applications such as Industry 4.0 and Smart Grids. Its rugged, reliable hardware features high EMC protection, wide temperature operation, and programming and installation flexibility in one device, while its advanced performance protects your data over the Internet with secure IPsec VPN or OpenVPN tunnels, with its powerful CPU providing up to 37.9Mbps* software-assisted AES encryption.

In addition to offering installation flexibility, the MB5901B series’ configuration options enable it to be set up over Ethernet via Telnet, Web Browser, Serial Console, or our Windows Utility.

Maintenance 4.0
ATOP Virtual COM software provides a virtual environment for applications when accessing MB5901B through TCP. Special management via SMS can be performed, such as polling data, issuing commands and system reboots.

Added value
A dedicated I/O version provides 2 x digital inputs and outputs each. These are also accessible via dedicated Modbus Registers. The -B version model also provides 15 seconds of back-up power in the event of a power failure, allowing the device to relay the failure to the host.

*Coming soon: test carried out with one VPN-IPsec Tunnel, Peer-to-Peer mode, Ethernet cable. Performance can change based on the Cellular Network.

Network Interface
SpeedIEEE 802.3 for 10BaseT
IEEE 802.3u for 100BaseT(X)
IEEE 802.3ab for 1000BaseT(X)
Connector ports1x 10/100/1000BASE-TX RJ-45
Wireless Interface    
Antennas/ SIM card(4G) - Internal SIM card slot (x1)
Band OptionsVersionStandardBands
EUFDD LTE2100/1800/850/2600/900/800MHz
TDD LTE2600/2300/2500MHz (B38/B40/B41)
WCDMA2100/850/900MHz (B1/B5/B8)
USFDD LTE1900/1700/850/700/600bMHz
WCDMA1900/1700/850MHz (B2/B4/B5)
Data RateVersionStandardDownlink SpeedUplink Speed
EULTE-FDD150 Mbps50 Mbps
LTE-TDD130 Mbps30 Mbps
DC-HSPA+42 Mbps5.76 Mbps
WCDMA384 Kbps384 Kbps
USLTE-FDD150 Mbps50 Mbps
DC-HSPA+42 Mbps5.76 Mbps
WCDMA384 Kbps384 Kbps
Serial Interface
ConnectorD-Sub9 RS-232/485 software selectable (DB model)
14-Pin 5.08mm Terminal Block (integrated with DI/DOs)
Ports1 port RS-232/485 (2-wire) software selectable
1 port RS-232 (IO model only)
Baud Rate1,200 to 921,600bps software selectable
Data Bits7, 8 software selectable
Stop Bits1, 2 software selectable
Flow ControlNone, Xon/Xoff, RTS/CTS (RS-232 only)
GNSS Interfaces
Supported GNSSGPS, Glonass, Beidou
Connector1x SMA
Other Interfaces
USB Ports2
USB Speed1 x USB 2.0 High Speed OTG; 1x USB power only
USB ConnectorUSB A Type
Digital Inputs (DI)2 x channels photo coupler isolated digital input
Digital Outputs (DO)2 x digital relay outputs. N.O.( 2A@24VDC)
SecurityIPsec or OpenVPN VPN tunneling. Max VPN throughput 37.9Mbps*; PPTP;
ManagementWeb, ATOP Device Management Utility, SNMPv1/v2c/v3, SMS
ConfigurationEmbedded Web-Server (Web UI), TELNET, Atop Device Management Utility
Modbus ProtocolsBi-directional Modbus TCP/RTU/ASCII, Virtual ID mapping
Modbus Gateway Supported ModesEthernet: Modbus TCP Server/Client(or VCOM);
Serial: Modbus RTU/ASCII (master/slave)
Maximum Number of Modbus clients/slavesModbus TCP: Maximum 16 clients;
Maximum 32 slave connections
* Coming soon: test carried out with one VPN-IPsec Tunnel, Peer-to-Peer mode, Ethernet cable. Performance can change based on the Cellular Network.
Input Voltage9 - 48 VDC
Connector3-Pin 5.08mm Lockable Terminal Block
Power Consumption0.65A@12 VDC (Approx. 7.8W)
Power RedundancyUSB DC 5V Power Input
Reverse Polarity ProtectionYes
Physical CharacteristicsValue
HousingIP30 protection, SPCC metal housing
Dimension (W x H x D)32mm x 122mm x 92mm
InstallationDIN-Rail , Wall mount (optional kit)
Reset ButtonYes
Environmental Limits
Operating Temperature-40°C~70°C (-40°F~158°F)
Storage Temperature-40°C~85°C (-40°F~185°F)
Ambient Relative Humidity5% to 95% (non-condensing)
SafetyCB (IEC/EN62368-1 & IEC/EN60950-1), UL60950-1
EMC/RadioFCC 47 CFR PART 22H, FCC 47 CFR PART 24H, FCC PART 27L, FCC Part 15B,
EN301489-1, EN301489-7, EN301489-19, EN301489-24, EN301489-52, EN301511,
EN301908-1, EN303413, ETSI EN300440-1/-2
EN61000-6-2, EN61000-6-4
IEC 61000-4-2ESDContact Discharge
Air Discharge
IEC 61000-4-3RSEnclosure Port10(V/m), 80-1000MHz3
IEC 61000-4-4EFTDC Power Port
Signal Port
IEC 61000-4-5SurgeDC Power Port
DC Power Port
Signal Port
Line-to Line±1.0KV
Line-to Earth±2.0KV
Line-to Earth±2.0KV
IEC 61000-4-6CS0.15-80MHz10V rms3
IEC 61000-4-8PFMF(Enclosure)AC 50Hz 30A/m3
ShockMIL-STD-810G Method 516.7
DropMIL-STD-810G Method 516.7
VibrationMIL-STD-810G Method 514.7
MTBF20.88 years according to MIL-HDBK-217F (Model average)
Warranty5 Years

Dimensions & Layout

Front/Top/Side/Back views
MB5901B-4G-US4G (US)1 (DB9)-
MB5901B-IO-4G-US4G (US)1 (TB) +1 RS2322/2-
MB5901B-IO-4G-GPS-US4G (US)1 (TB) +1 RS2322/2GPS
MB5901B-4G-B-US4G (US)1 (DB9)Battery
MB5901B-IO-4G-B-US4G (US)1 (TB) +1 RS2322/2Battery
MB5901B-IO-4G-GPS-B-US4G (US)1 (TB) +1 RS2322/2GPS, Battery
MB5901B-4G-EU4G (EU)1 (DB9)-
MB5901B-IO-4G-EU4G (EU)1 (TB) +1 RS2322/2-
MB5901B-IO-4G-GPS-EU4G (EU)1 (TB) +1 RS2322/2GPS
MB5901B-4G-B-EU4G (EU)1 (DB9)Battery
MB5901B-IO-4G-B-EU4G (EU)1 (TB) +1 RS2322/2Battery
MB5901B-IO-4G-GPS-B-EU4G (EU)1 (TB) +1 RS2322/2GPS, Battery
UN315-1212 (US-Y)50500151120003GY-Type power adaptor, 100~240VAC input, 1.25A @ 12VDC output, US plug, LV6
UNE315-1212 (EU-Y)50500151120013GY-Type power adaptor, 100~240VAC input, 1.25A @ 12VDC output, EU plug, LV6
ADP-DB9(F)-TB559906231GFemale DB9 to Female 3.81 TB5 Converter
WMK-315-Black70100000000050GBlack Aluminum Wall Mount Kit


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


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
v1.68 MB59XX Firmware 2022-09-13 16.15 MB


Version Name Time Size Download
v1.1 Datasheet EN 2023-11-01 323.19 KB
v1.0 Datasheet EN 2022-12-01 344.18 KB
v0.9 Datasheet EN 2022-11-07 375.28 KB
v0.6 Datasheet EN 2019-07-15 376.07 KB
v0.5 Datasheet EN 2018-12-14 537.23 KB
v0.4 Datasheet EN 2018-06-07 548.55 KB
v0.3 Datasheet EN 2018-05-17 548.55 KB


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

Hardware Installation Guide

Version Name Time Size Download
v1.0 SE5901B/MB5901B/PG5901B Hardware Installation Guide 2017-06-09 5.91 MB

Test reports

Version Name Time Size Download
MB5901B Declarations of Conformity 2023-03-09 349.06 KB
SE-MB-PG5901B Certifications CB(IEC) 2022-11-08 4.29 MB
v1.0 SE-MB-PG5901B Certifications CB(IEC) 2019-11-20 5.05 MB
v1.0 SE-MB-PG5901B Certifications CE 2019-11-20 27.44 MB
v1.0 SE-MB-PG5901B Certifications EN55032 EN55024 2019-11-20 7.77 MB
v1.0 SE-MB-PG5901B Certifications Environment 2019-11-20 6.05 MB
v1.0 SE-MB-PG5901B Certifications FCC 2019-11-20 17.22 MB
v1.0 SE-MB-PG5901B Certifications LVD 2019-11-20 6.2 MB
v1.0 SE-MB-PG5901B Certifications NCC 2019-11-20 24.06 MB
v1.0 SE-MB-PG5901B Certifications UL 2019-11-20 6.66 MB

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