Compact 1-Port Industrial Modbus TCP/RTU/ASCII Gateway, Field-Mount

  • 1 x software-selectable RS-232/485/422 port
  • 1 x 10/100Mbps RJ45 Fast Ethernet port
  • Supports TCP server/client, UDP, Virtual COM and Tunneling modes
  • Modbus TCP/RTU/ASCII
  • Configuration via Web Server page, Telnet Console, and Windows Utility
  • Upgradable firmware via Ethernet from a remote-PC
  • Rugged metal casing; industrial EMC protection
  • Redundant dual DC power inputs for non-stop operation
  • Optional DIN-Rail mounting

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 MB5201 ready for every mission.

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.

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.

Network Interface
SpeedIEEE 802.3 10BaseT
IEEE 802.3u 100BaseT(X)
Auto MDI/MDI-XPresent
Connector portsRJ45 x 1
Serial Interface
Connector9-Pin D-Sub9 connector(Male, -DB version) or 5-Pin Terminal block (-TB version)
ModeRS-232/RS-485(2 and 4 wire)/RS-422, software selectable
Baud Rate1200~230,400 bps
ParityNone, Odd, Even, Space, Mark
Data Bits7, 8
Stop Bits1, 2
Flow ControlNone, Xon/Xoff, RTS/CTS (RS-232 only)
ProtocolsTCP, IPv4, UDP, DHCP Client, HTTP, HTTPS, Telnet, ARP, SNMPv1,v2c,v3
ConfigurationAtop Management Utility, Web UI, Telnet, CLI
VirtualCOMWindows/Linux redirection software
Supported ModelsEthernet: Modbus TCP Server/Client(or VCOM); Serial: Modbus RTU/ASCII
Maximum number of clients/slavesModbus TCP: Maximum 16 clients; Maximum 32 slave connections
Connector3-Pin 5.08mm Lockable Terminal Block and DC Jack for redundancy
Input Voltage

3-Pin 5.08mm Lockable Terminal Block: 9-30VDC; DC Jack 5VDC

Power Consumption<1.5W @9VDC
Power RedundancyYes
Reverse Polarity ProtectionYes
Physical CharacteristicsValue
Dimension (W x H x D)65mm x 78mm x 28mm (without wall-mount part)
SE5201-TB: 88.5 x 78.3 x 27.8mm (with wall-mount part)
SE5201-DB: 88.5 x 84 x 27.8mm (with wall-mount part and DB9 connector)
InstallationWall mount, DIN-Rail (optional)
Reset ButtonYes
Environmental Limits
Operating Temperature-20°C ~ 70°C (-4°F ~ 158°F)
Storage Temperature-40°C ~ 85°C (-40°F ~ 185°F)
Ambient Relative Humidity5 ~ 95% RH, (non-condensing)
SafetyEN 60950-1 / EN62368-1
EMCFCC Part 15, Subpart B, Class A, EN 55032, EN61000-6-4, EN 61000-3-2, EN 61000-3-3, EN 55024, EN61000-6-2
RoHS 2Yes
StandardItemTest pointValueLevel
IEC 61000-4-2Electrostatic DischargeContact Discharge±4kV2
IEC 61000-4-2Electrostatic DischargeAir Discharge±8kV3
IEC 61000-4-3Radiated Susceptibility80-1000MHz10(V/m)3
IEC 61000-4-4EFTAC Power Port±2.0kV3
IEC 61000-4-4EFTDC Power Port±1.0kV3
IEC 61000-4-4EFTSignal Port±1.0kV3
IEC 61000-4-5SurgeAC Power PortLine-to Line±1.0kV3
IEC 61000-4-5SurgeAC Power PortLine-to Earth±2.0kV3
IEC 61000-4-5SurgeDC Power PortLine-to Line±0.5KV2
IEC 61000-4-5SurgeDC Power PortLine-to Earth±1KV2
IEC 61000-4-5SurgeSignal PortLine-to Earth±1.0KV2
IEC 61000-4-6Conducted Susceptibility0.15-80MHz10 Vrms3
IEC 61000-4-8PFMFEnclosure30A/m4
IEC 61000-4-11DIPAC Power Port1. >95%,Reduction,0.5period
2. 30%, Reduction,25 period
3. >95%,Reduction,250 period
ShockMIL-STD-810F Method 516.5
DropMIL-STD-810F Method 516.5
VibrationMIL-STD-810F Method 514.5 C-1 & C-2
Warranty5 Years
MTBF25.29 years according to MIL-HDBK-217F, 25 degrees C
ProtectionIEC/EN60529 - IP30


MB5201-DB1P1MB520100001G1-Port Modbus TCP/RTU Gateway, industrial EMC potection,
RS-232/422/485, DB9(M)
MB5201-TB1P1MB520100002G1-Port Modbus TCP/RTU Gateway, industrial EMC potection,
RS-232/422/485, Terminal Block
UN315-1212 (US-Y)50500151120003GY-Type power adapter, 100~240VAC input, 1.25A @12VDC output, US plug
UNE315-1212 (EU-Y)50500151120013GY-Type power adapter, 100~240VAC input, 1.25A @12VDC output, EU plug
UV305-0510(US-DC)50500051500003GDC jack (3.5/1.35/7.5 mm) power adapter, 100~240VAC input,
1.0A @ 5 VDC output, US plug, LV6
UVE305-0510 (EU-DC)50500051500013GDC jack (3.5/1.35/7.5 mm) power adapter, 100~240VAC
input, 1.0A @ 5 VDC output, EU plug, LV6
UVE305-0510(UK-DC)50500051500023GDC jack (3.5/1.35/7.5 mm) power adapter, 100~240VAC
input, 1.0A @ 5 VDC output, UK plug, LV6
ADP-DB9(F)-TB559906231GFemale DB9 to Female 3.81mm TB5 Converter
ADP-DB9(M)-DB9(F)59901411GSE_MB52XX DB9 Pin assignment to SE_MB50XX DB9 Pin assignment
DK-2530200000000022GPlastic DIN Rail 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


Version Name Time Size Download
v1.06 MB5201 Firmware 2024-03-01 10.48 MB
v1.04 MB5201 Firmware. Notes: This new version improves the firmware mechanism and takes its new firmware upgrade mechanism, so downgrading to older FW versions is not allowed. 2021-12-21 10.38 MB
v1.02 MB5201 Firmware 2019-11-15 10.21 MB


Version Name Time Size Download
v1.0 Datasheet EN 2024-01-10 205.23 KB
v0.5 Datasheet EN 2023-11-01 193.91 KB
v0.4 Datasheet EN 2020-09-26 235.36 KB
v0.3 Datasheet EN 2020-09-25 235.27 KB
v0.2 Datasheet EN 2020-06-15 235.37 KB
v0.1 Datasheet EN 2019-11-13 234.26 KB


Version Name Time Size Download
v1.0 MB52XX User Manual 2019-11-15 1.96 MB

Hardware Installation Guide

Version Name Time Size Download
v1.0 MB5201 Hardware Installation Guide 2019-11-13 7.12 MB

STP/DXF drawings

Version Name Time Size Download
MB5201 STP 2024-01-10 2.33 MB

Test reports

Version Name Time Size Download
MB5201 Declarations of Conformity 2023-03-10 297.88 KB
v1.0 SE5201_MB5201_CE_FCC 2020-09-23 830.22 KB
v1.0 SE5201_MB5201_LVD 2020-09-23 4.5 MB

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