Compact 2-Port Industrial Modbus TCP/RTU/ASCII Gateway, Field-Mount

Flexible Connectivity

  • Software-selectable RS-232/485/422
  • RJ45 Fast Ethernet port or 100Mbps SFP Slot
  • Modbus TCP/RTU/ASCII
  • Supports TCP server/client, UDP

Comprehensive Management

  • Configuration via Web, Telnet and Windows Utility
  • Integrated SNMPv1/v2c/v3, HTTPS, Telnet and SSH configuration
  • Upgradable firmware via Ethernet from a remote-PC
  • Virtual COM and Tunneling modes

Reliable & Redundant Design

  • Rugged metal casing; industrial EMC protection
  • Redundant dual DC power inputs for non-stop operation

Diverse Hardware Infrastructure
The MB5202 Modbus Gateway supports the four most commonly used communication standards, RS-232, RS-485, RS-422, and Ethernet. It comes with a user-friendly configuration utility to allow quick hardware interface selection, so you can easily connect to your existing communication infrastructure. And with industrial EMC protection plus a wide operation temperature range, MB5202 is ready for every mission.

Switching between Modbus Protocols
MB5202 supports the Modbus protocols and is capable of conversion between Modbus TCP, Modbus RTU, and Modbus ASCII for all supported hardware interfaces.

Modbus ID Routing
Besides various types of hardware communication interfaces and Modbus protocol conversion, MB5202 also supports Modbus ID routing. Therefore, it can integrate your existing and complex Modbus hardware configuration into a simple network for easy management.

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
Environmental Limits
Operating Temperature-20°C to +70°C (-4°F to +58°F)
Storage Temperature-40°C to +85°C (-40°F to +185°F)
Ambient Relative Humidity5 to 95% RH (non-condensing)
Physical CharacteristicsValue
Dimension (W x H x D)75 mm x 85 mm x 28 mm (without wall-mount part)
MB5202-TB/MB5202-Sis: 74.5 x 108.2 x27.5mm (with wall-mount part)
MB5202-DB: 80.3 x 108.2 x27.5mm (with wall-mount part and DB9 connector)
MB5202-SFP-TB: 76.6 x 108.2 x 27.5mm (with wall-mount and SFP)
MB5202-SFP-DB: 81.4 x 108.2 x 27.5mm (with wall-mount SFP and DB9)
InstallationWall-Mount or DIN-Rail (optional kit)
Reset ButtonYes
Connector3-Pin 5.08mm Lockable Terminal Block and DC Jack for redundancy
Input Voltage3-Pin 5.08mm Terminal Block: 9-30VDC; DC Lockable Jack 5VDC
Power Consumption<9W
Power RedundancyYes
Reverse Polarity ProtectionYes
Serial Interface
Connector9-Pin D-Sub9 connector(Male, -DB version) or 5-Pin Terminal block (-TB version)
Mode1x RS-232(Full-function DB9)/RS-485(2 and 4 wire)/RS-422, software selectable
1x RS-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)
Network Interface
Ethernet Port1x 10/100BASE-T(X) RJ-45 or 1x100BASE-FX SFP Slot
ComplianceIEEE 802.3 for 10BASE-T
IEEE 802.3u for 100BASE-T(X) and 100BASE-FX
ShockMIL-STD-810F Method 516.5
DropMIL-STD-810F Method 516.5
VibrationMIL-STD-810F Method 514.5 C-1 & C-2
Warranty5 Years
StandardItemTest pointValueLevel
IEC 61000-4-2ESDContact Discharge
Air Discharge
IEC 61000-4-3RS80-1000MHz10(V/m)3
IEC 61000-4-4EFTAC Power Port
DC Power Port
Signal Port
IEC 61000-4-5SurgeAC Power Port
AC Power Port
DC Power Port
DC Power Port
Signal Port
Line-to Earth±2.0KV
Line-to Line ±0.5KV
Line-to Line ±0.5KV
IEC 61000-4-6CS0.15-80MHz10 Vrms3
IEC 61000-4-8PFMFEnclosure30A/m3
IEC 61000-4-11DIPAC Power Port--
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


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
2AAU005B-EU50500051500014GDC jack (5.0/2.1/9.5 mm) with Lock power adapter, 100~240VAC input, 1.0A @ 5 VDC output, EU plug, LV VI
2AAU005B-US50500051500004GDC jack (5.0/2.1/9.5 mm) with Lock power adapter, 100~240VAC input, 1.0A @ 5 VDC output, US plug, LV VI
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
AXFD-1314-0523522AXFD1314001GSFP Transceiver: 155Mbps, Multi-mode, 1310nm, 2km, -40 to +85°C,
AXFD-1314-0553522AXFD1314011GSFP Transceiver: 155Mbps, Single-mode, 1310nm, 30km, -40 to +85°C,
MB5202-DB1P1MB520200001G2-Port Entry-Level Modbus Gateway, RS-232/422/485, DB9(M)
MB5202-TB1P1MB520200002G2-Port Entry-Level Modbus Gateway, RS-232/422/485, Terminal block
MB5202-SiS1P1MB520200003G2-Port Entry-Level Modbus Gateway, RS-232/422/485, 2kV Isolation,
Terminal block
MB5202-SFP-DB1P1MB520200004G2-Port Entry-Level Modbus Gateway, RS-232/422/485, DB9(M)
MB5202-SFP-TB1P1MB520200005G2-Port Entry-Level Modbus Gateway, RS-232/422/485, Terminal block


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 MB5202 Firmware 2024-03-01 10.48 MB
v1.04 MB5202 Firmware. Notes: 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 MB5202 Firmware 2019-11-15 10.24 MB


Version Name Time Size Download
v1.0 Datasheet EN 2023-11-01 180.42 KB
v0.9 Datasheet EN 2022-03-24 232.5 KB
v0.8 Datasheet EN 2021-03-25 220.36 KB
v0.7 Datasheet EN 2020-09-26 218.65 KB
v0.6 Datasheet EN 2020-06-18 218.62 KB
v0.5 Datasheet EN 2020-06-15 218.61 KB
v0.4 Datasheet EN 2020-05-27 218.54 KB
v0.3 Datasheet EN 2020-05-11 221.95 KB
v0.2 Datasheet EN 2019-12-27 218.44 KB
v0.1 Datasheet EN 2019-11-14 218.45 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 MB5202 Hardware Installation Guide 2019-11-14 3.88 MB

STP/DXF drawings

Version Name Time Size Download
v1.0 SE/MB5202. STP file 2022-07-07 853.01 KB

Test reports

Version Name Time Size Download
MB5202 Declarations of Conformity 2023-03-09 307.6 KB
v1.0 SE5202-MB5202 CE/FCC/LVD Certifications 2019-11-15 11.6 MB

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