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MGate 4101-MB-PBS Series

1-port Modbus RTU/ASCII-to-PROFIBUS slave gateways

Features and Benefits

  • Protocol conversion between Modbus and PROFIBUS
  • Supports PROFIBUS DP V0 slave
  • Supports Modbus RTU/ASCII master and slave
  • Windows utilities with innovative QuickLink function for automatic configuration within minutes
  • Status monitoring and fault protection for easy maintenance
  • Embedded traffic monitoring/diagnostic information for easy troubleshooting
  • Supports redundant dual DC power inputs and 1 relay output
  • -40 to 75°C wide operating temperature models available
  • Serial port with 2 kV isolation protection (for “-I” models)
Certifications
Overview
Specifications
Resources
Models
Contact Sales

Introduction

The MGate 4101-MB-PBS gateway provides a communication portal between PROFIBUS PLCs (e.g., Siemens S7-400 and S7-300 PLCs) and Modbus devices. With the QuickLink feature, I/O mapping can be accomplished within a matter of minutes. All models are protected with a rugged metallic casing, are DIN-rail mountable, and offer optional built-in optical isolation.

QuickLink and Windows Utilities for Easy Setup and Traffic Monitoring

The QuickLink windows utility uses a serial console port to connect to the MGate 4101-MB-PBS and makes configuration and operation as easy as possible. QuickLink can finish the configuration in just a few minutes by passively detecting Modbus requests with the AutoLearning function, and performs error-free I/O mapping with the AutoMapping feature. QuickLink drastically reduces Modbus-to-PROFIBUS integration time when compared to conventional I/O mapping, which can easily require days to complete. Additionally, embedded monitoring tools can maintain logs of Modbus communication packets and assist in troubleshooting.

Redundant Power Inputs

The MGate 4101-MB-PBS has dual power inputs for greater reliability. The power inputs allow simultaneous connection to 2 live DC power sources, so that continuous operation is provided even if one power source fails. The higher level of reliability makes these advanced Modbus-to-PROFIBUS gateways ideal for demanding industrial applications.

Warning by Relay Output

A relay output is provided for the power input status. The relay output gives maintenance engineers an additional tool for troubleshooting and maintenance.

  • Console Port

    RS-232 (TxD, RxD, GND), 8-pin RJ45 (115200, n, 8, 1)

  • No. of Ports

    1

  • Connector

    DB9 male

  • Serial Standards

    RS-232/422/485

  • Baudrate

    50 bps to 921.6 kbps

  • Data Bits

    7, 8

  • Parity

    None, Even, Odd, Space, Mark

  • Stop Bits

    1, 2

  • Flow Control

    DTR/DSR
    RTS/CTS

  • RS-485 Data Direction Control

    Automatic Data Direction Control (ADDC)

  • Pull High/Low Resistor for RS-485

    1 kilo-ohm, 150 kilo-ohms

  • Terminator for RS-485

    120 ohms

  • Isolation

    2 kV (I models)

  • RS-232

    TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND

  • RS-422

    Tx+, Tx-, Rx+, Rx-, GND

  • RS-485-2w

    Data+, Data-, GND

  • RS-485-4w

    Tx+, Tx-, Rx+, Rx-, GND

  • Configuration Options

    MGate Manager

  • Industrial Protocols

    Modbus RTU/ASCII Master
    Modbus RTU/ASCII Slave
    PROFIBUS DP-V0 Slave

  • Mode

    Master, Slave

  • Functions Supported

    1, 2, 3, 4, 5, 6, 15, 16, 23

  • Max. No. of Commands

    100

  • Input Data Size

    7744 bytes

  • Output Data Size

    7744 bytes

  • Industrial Protocols

    PROFIBUS DP

  • No. of Ports

    1

  • Connector

    DB9 female

  • Baudrate

    9600 bps to 12 Mbps

  • Isolation

    2 kV (built-in)

  • Signals

    PROFIBUS D+, PROFIBUS D-, RTS, Signal Common, 5V

  • Rotary Switch

    PROFIBUS addresses 0-99 (addresses 100-125 supported through software configuration)

  • Mode

    DP-V0 Slave

  • Max. No. of Master Connections

    1

  • Max. No. of PROFIBUS I/O Modules

    24 per page

  • Max. No. of PROFIBUS Pages

    32

  • Input Data Size

    7744 bytes

  • Output Data Size

    7744 bytes

  • Input Voltage

    12 to 48 VDC

  • Input Current

    275 mA @ 12 VDC

  • Power Connector

    Screw-fastened Euroblock terminal

  • Contact Current Rating

    Resistive load: 1 A @ 24 VDC

  • Housing

    Metal

  • Dimensions

    36 x 105 x 140 mm (1.42 x 4.14 x 5.51 in)

  • Weight

    500 g (1.10 lb)

  • IP Rating

    IP30
    Note: It is recommended to attach the M3x3mm Nylok screws at the rear side

  • Operating Temperature

    MGate 4101I-MB-PBS: 0 to 60°C (32 to 140°F)
    MGate 4101I-MB-PBS-T: -40 to 75°C (-40 to 167°F)
    MGate 4101-MB-PBS: 0 to 60°C (32 to 140°F)
    MGate 4101-MB-PBS-T: -40 to 75°C (-40 to 167°F)

  • Storage Temperature (package included)

    -40 to 85°C (-40 to 185°F)

  • Ambient Relative Humidity

    5 to 95% (non-condensing)

  • EMC

    EN 55032/35

  • EMI

    CISPR 32, FCC Part 15B Class A

  • EMS

    IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV
    IEC 61000-4-3 RS: 80 MHz to 1 GHz: 3 V/m
    IEC 61000-4-4 EFT: Power: 2 kV; Signal: 1 kV
    IEC 61000-4-5 Surge: Power: 2 kV; Signal: 2 kV
    IEC 61000-4-6 CS: 150 kHz to 80 MHz: 10 V/m; Signal: 10 V/m
    IEC 61000-4-8 PFMF

  • Safety

    IEC 60950-1
    UL 60950-1
    IEC 62368-1
    UL 62368-1

  • Hazardous Locations

    ATEX
    Class I Division 2
    IECEx

  • Freefall

    IEC 60068-2-32

  • Shock

    IEC 60068-2-27

  • Vibration

    IEC 60068-2-6
    IEC 60068-2-64

  • Time

    MGate 4101-MB-PBS models: 1,537,948 hrs
    MGate 4101I-MB-PBS models: 1,315,666 hrs

  • Standards

    Telcordia SR332

Software, Firmware, and Drivers

FILTER

All Firmware Software Package Utility
Name Type Checksum Version Operating System Release Date
Device Search Utility (installer) Download
236.2 MB 		Utility
SHA-512
v3.1
  • Windows 10
  • Windows 11
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows Server 2008 R2
  • Windows Server 2012
  • Windows Server 2012 R2
  • Windows Server 2016
  • Windows Server 2019
  • Windows Server 2022
  • Windows Server 2025
 Nov 17, 2025 Nov 17, 2025 Release notes
Device Search Utility (portable) Download
128.6 MB 		Utility
SHA-512
v3.1
  • Windows 10
  • Windows 11
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows Server 2008 R2
  • Windows Server 2012
  • Windows Server 2012 R2
  • Windows Server 2016
  • Windows Server 2019
  • Windows Server 2022
  • Windows Server 2025
 Nov 17, 2025 Nov 17, 2025 Release notes
Firmware for MGate 4101-MB-PBS Series Download
186.1 KB 		Firmware
SHA-512
v2.1
Dec 12, 2023 Dec 12, 2023 Release notes
MGate Manager Utility Download
5.4 MB 		Utility
SHA-512
v1.19
  • Windows 10
  • Windows 11
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows Server 2008 R2
  • Windows Server 2012
  • Windows Server 2012 R2
  • Windows Server 2016
  • Windows Server 2019
  • Windows Server 2022
 Dec 12, 2023 Dec 12, 2023 Release notes
MGate Manager Utility Download
5.4 MB 		Utility
SHA-512
v1.18
  • Windows
  • Windows 10
  • Windows 11
  • Windows 7
  • Windows 8
  • Windows 8.1
  • Windows Server 2008 R2
  • Windows Server 2012
  • Windows Server 2012 R2
  • Windows Server 2016
  • Windows Server 2019
  • Windows Server 2022
 Sep 25, 2023 Sep 25, 2023 Release notes
Software Package for MGate 4101-MB-PBS Series (PROFIBUS GSD file) Download
5.0 KB 		Software Package
SHA-512
v1.1
Apr 22, 2020 Apr 22, 2020 Release notes

Support Documents

FILTER

All 2D CAD Datasheet Declaration Manual QIG Tech Note
Name Type Version Release Date
Moxa CLI Configuration Tool User Manual Download
850.9 KB 		Manual v2.5 Feb 12, 2026 Feb 12, 2026
Device Search Utility v3.x User Manual Download
2.8 MB 		Manual v1.1 Nov 17, 2025 Nov 17, 2025
FOSS Statement for MGate Manager Download
214.8 KB 		Declaration v1.0 Mar 21, 2025 Mar 21, 2025
QIG for MGate 4101-MB-PBS Series Download
991.5 KB 		QIG v6.2 Dec 10, 2024 Dec 10, 2024
Declaration of Conformity for MGate 4101-MB-PBS Series Download
297.3 KB 		Declaration v1.0 Jun 04, 2024 Jun 04, 2024
Datasheet for MGate 4101-MB-PBS Series Download
719.0 KB 		Datasheet v1.1 Apr 23, 2024 Apr 23, 2024
Manual for MGate 4101-MB-PBS Series Download
4.8 MB 		Manual v6.3 Dec 05, 2023 Dec 05, 2023
Tech Note: How to use the MGate 4101-MB-PBS Series Paging Function Download
569.4 KB 		Tech Note v1.0 Oct 13, 2023 Oct 13, 2023
Tech Note: How to Program Siemens Step 7 to Get MGate 4101-MB-PBS' Diagnostic Information Download
2.8 MB 		Tech Note v1.0 Jul 19, 2017 Jul 19, 2017
Tech Note: How to Configure Pro-face HMI with Siemens PLC Download
2.8 MB 		Tech Note v1.0 Jan 06, 2015 Jan 06, 2015
Tech Note: PROFIBUS Configuration for Siemens S7-300 Download
1.6 MB 		Tech Note v1.0 Jan 06, 2015 Jan 06, 2015
2D CAD for MGate 4101-MB-PBS TOP Download
467.5 KB 		2D CAD Oct 06, 2014 Oct 06, 2014
2D CAD for MGate 4101I-MB-PBS TOP Download
467.9 KB 		2D CAD Oct 06, 2014 Oct 06, 2014

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Available Models (4)

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moxa-mgate-4101-mb-pbs-image.jpg | MoxaMGate 4101-MB-PBS
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moxa-mgate-4101i-mb-pbs-image.jpg | MoxaMGate 4101I-MB-PBS
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moxa-mgate-4101-mb-pbs-t-image.jpg | MoxaMGate 4101-MB-PBS-T
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moxa-mgate-4101i-mb-pbs-t-image.jpg | MoxaMGate 4101I-MB-PBS-T
Serial Isolation–2 kV–2 kV
Operating Temp.0 to 60°C0 to 60°C-40 to 75°C-40 to 75°C
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