Features and Benefits 

  • Protocol conversion between Modbus and PROFIBUS
  • Windows utilities with innovative QuickLink function for automatic configuration within minutes
  • Redundant dual DC power inputs and relay output supported
  • Embedded data packet analyzer
  • Powerful and visual diagnostic tool
  • -40 to 75°C wide operating temperature models available

OverviewMoxa protocol converter gateway

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-Moxa_GatewayPBS 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 performing 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 connections to two 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.

• PROFIBUS Interface
ProtocolPROFIBUS DP-V0 Slave
Number of Ports1
Data Rate9600 bps to 12 Mbps
ConnectorDB9 female
Isolation2 kV (built-in)
DIP SwitchFor termination
Rotary SwitchPROFIBUS address 0-99 (address 100-125 supported through software configuration)
• Modbus Interface
ProtocolModbus RTU/ASCII Master/Slave
Number of Ports1
Serial StandardsRS-232/422/485, software selectable
ConnectorsDB9 male
ESD Protection15 kV for all signals
RS-485 Data Direction ControlADDC® (automatic data direction control)
Pull High/Low Resistor for RS-4851 kΩ, 150 kΩ
Terminator for RS-485120 Ω
Data Bits7, 8
Stop Bits1, 2
ParityNone, Even, Odd, Space, Mark
Flow ControlRTS/CTS, DTR/DSR (RS-232 only)
Baudrate50 bps to 921.6 kbps
• Serial Signals
RS-422Tx+, Tx-, Rx+, Rx-, GND
RS-485-4wTx+, Tx-, Rx+, Rx-, GND
RS-485-2wData+, Data-, GND
• Software
Configuration OptionsSerial Console, Windows Utility
UtilityMGate Manager for Windows 2000, Windows XP, Server 2003, Vista, Server 2008 (x86/x64), Windows Server 2008 R2, Windows 7/8/8.1 (x86/x64), Windows Server 2012 (x64), Windows 2012 R2
SupportQuickLink, Paging
• Physical Characteristics
HousingMetal, IP30
Weight500 g (1.10 lb)
Dimensions36 x 105 x 140 mm (1.42 x 4.14 x 5.51 in)
• Environmental Limits
Operating TemperatureStandard Models: 0 to 60°C (32 to 140°F)
Wide Temp. Models: -40 to 75°C (-40 to 167°F)
Storage Temperature-40 to 85°C (-40 to 185°F)
Ambient Relative Humidity5 to 95% (non-condensing)
VibrationIEC 60068-2-6, IEC 60068-2-64
ShockIEC 60068-2-27
DropIEC 60068-2-32
• Power Requirements
Input Voltage12 to 48 VDC
Input CurrentMGate 4101-MB-PBS: 340 mA @ 12 VDC; 130 mA @ 48 VDC
MGate 4101I-MB-PBS: 375 mA @ 12 VDC; 140 mA @ 48 VDC
Power ConnectorTerminal block
• Standards and Certifications
SafetyUL 60950-1, EN 60950-1
Hazardous LocationClass 1 Division 2, ATEX, IECEx
EMCEN 55032/24
EMICISPR 32, FCC Part 15B Class A
EMSIEC 61000-4-2 ESD: Contact: 4 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: 3 V/m
IEC 61000-4-8 PFMF
• MTBF (mean time between failures)
Time513,139 hrs
StandardTelcordia SR332
• Warranty
Warranty Period5 years
DetailsSee www.moxa.com/warranty

Available Models

Model No.Description
MGate 4101-MB-PBS1-port Modbus to PROFIBUS Slave gateway, 12-48 VDC, 0 to 60°C operating temperature
MGate 4101I-MB-PBS1-port Modbus to PROFIBUS Slave gateway with 2 KV Isolation, 12-48 VDC, 0 to 60°C operating temperature
MGate 4101-MB-PBS-T1-port Modbus to PROFIBUS Slave gateway, 12-48 VDC, -40 to 75°C operating temperature
MGate 4101I-MB-PBS-T1-port Modbus to PROFIBUS Slave gateway with 2 KV Isolation, 12-48 VDC, -40 to 75°C operating temperature

Optional Accessories

 DIN Rail Power Supplies

Model No.Description
DR-452445W/2A DIN-rail 24 VDC power supply with universal 85 to 264 VAC or 120-370 VDC input, -10 to 50°C operating temperature
DR-75-2475W/3.2A DIN-rail 24 VDC power supply with universal 85 to 264 VAC or 120-370 VDC input, -10 to 60°C operating temperature
DR-120-24120W/5A DIN-rail 24 VDC power supply with universal 88 to 132 VAC or 176 to 264 VAC input by switch, or 248-370 VDC , -10 to 60°C operating temperature


Model No.Description
Mini DB9F-to-TBDB9 Female to Terminal Block connector