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1 Port RS-232/422/485 Modbus TCP to Modbus Serial ASCII/RTU, Class 1 Div 2, DIN Rail, 15KV Surge

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Mfg Part Number:  MGate MB3170  
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Price: $336.55
In Stock: 16
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The MB3170 and MB3270 are advanced Modbus gateways that provide maximum flexibility for integrating industrial Modbus networks of all types and sizes. They are designed to integrate Modbus TCP, ASCII, and RTU devices in almost any master and slave combination, including serial master to serial slave, or simultaneous serial and Ethernet masters. A special priority control feature allows urgent commands to obtain immediate response. All models are ruggedly constructed, allow DIN-rail mounting, and offer built-in serial optical isolation as an option.

Integration of TCP masters without alteration to Modbus RTU/ASCII network or software
The MB3270 can integrate Modbus TCP with Modbus RTU/ASCII, without modifying the existing Modbus RTU/ASCII architecture or software. With the serial redirector function, a serial master can maintain direct access to serial slave devices through a specially mapped serial port. This allows the serial and TCP masters to have simultaneous access to serial slaves.

Cascading Ethernet ports for easy wiring
Advanced models of the MGate MB3000 provide two Ethernet ports for easier network wiring. Dual Ethernet ports allow users to string multiple Modbus gateways together using standard RJ45 Ethernet cables, eliminating the need for a separate Ethernet switch.

Redundant power inputs
MB3000 advanced models include 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 gateways ideal for the demanding requirements of industrial applications.

Warning by relay output
Relay output is provided for Ethernet link and power input status. With relay output, maintenance engineers have an additional tool for better troubleshooting and maintenance.

Priority control for urgent commands (patent pending)
As Modbus networks increase in size and complexity, the lag time between commands and responses becomes a growing concern. MB3000 advanced models provide a priority control function for urgent commands, allowing users to force certain commands to obtain an immediate response. Different methods are available to define which commands receive priority, depending on your system's requirements.

Easy configuration
Slave mode supports 16 TCP masters and 31/62 serial slaves at the same time
Master mode supports 32 TCP slaves at the same time
Supports emergency request tunnels, ensuring QoS control
Supports serial redirector
Embedded Modbus protocol analyzer
Redundant dual DC power inputs
Built-in Ethernet cascading ports for easy wiring

10/100 Mbps, RJ45, Auto MDI/MDIX
Built-in 1.5 KV magnetic isolation
Serial Interface
RS-232/422/485, software selectable
No. of Ports
MB3170, MB3170I: 1
MB3270, MB3270I: 2
Port Type
MB3170/MB3170I - Male DB9 for RS-232, terminal block for RS-422/485
MB3270/MB3270I - Male DB9
RS-422: Tx+, Tx-, Rx+, Rx-, GND
RS-485 (2-wire): Data+, Data-, GND
RS-485 (4-wire): Rx+, Tx-, Rx+, GND
Serial line protection
15 KV ESD for all signals
Serial Communication Parameters
None, Even, Odd, Space, Mark
Data bits
7, 8
Stop bit
1, 2
Flow control
50 to 921.6 Kbps
Software Features
Operation Modes
RTU Slave, RTU Master, ASCII Slave, ASCII Master
MGate Manager Suite for Windows 98/ME/NT/2000/XP/2003/Vista
Multi-master and multi-drop
Master mode: 32 TCP slaves.
Slave mode: 16 TCP masters, 32 request queue depth for each master.
Power Requirements
Power input
12 to 48 VDC
Power connector
terminal block
Power Consumption
MB3170: 400 mA @ 12 VDC, 130 mA @ 48 VDC
MB3170I: 405 mA @ 12 VDC, 140 mA @ 48 VDC
MB3270: 410 mA @ 12 VDC, 145 mA @ 48 VDC
MB3270I: 470 mA @ 12 VDC, 150 mA @ 48 VDC
Power line protection
1 KV Burst (EFT), EN61000-4-4
0.5 KV Surge, EN61000-4-5
Operating Temperature
0 to 55 °C (32 to 131 °F), 5 to 95% RH (60)
-40 to 75 °C (-40 to 167°F) for -T models
Storage Temperature
-20 to 85 °C (-4 to 185 °F), 5 to 95% RH
Regulatory Approvals

CE: EN550022 Class A / EN550024
FCC: FCC Part 15 subpart B, Class A


TUV: EN60950-1
Shock: IEC60068-2-27
Freefall: IEC60068-2-23
Vibration: IEC60068-2-6

5 years


Power Requirements
Power Consumption MGate MB3170: 435 mA (max.)
MGate MB3170I: 555 mA (max.)
MGate MB3270: 435 mA (max.)
MGate MB3270I: 510 mA (max.)
Input Voltage 12 to 48 VDC
Power Connector Terminal block
Utilities MGate Manager for Windows 98/ME/NT/2000, Windows XP/2003/Vista/2008/7 x86/x64
Operation Modes RTU Slave, RTU Master, ASCII Slave, ASCII Master
Multi-master and Multi-drop Master mode: 32 TCP slaves
Slave mode: 16 TCP masters (request queue 32-deep for each master)
Configuration Options Web Console, Serial Console, Telnet Console, Windows Utility
Bonus Features Smart Routing, Serial Redirection, Priority Control
Serial Communication Parameters
Flow Control RTS/CTS, DTR/DSR (RS-232 only)
Data Bits 7, 8
Parity None, Even, Odd, Space, Mark
Stop Bits 1, 2
Baudrate 50 bps to 921.6 Kbps
Ethernet Interface
Connector 8-pin RJ45
Speed 10/100 Mbps, Auto MDI/MDIX
Magnetic Isolation Protection 1.5 KV built-in
Number of Ports 2 (1 IP)
Environmental Limits
Operating Temperature Standard Models: 0 to 55°C (32 to 131°F)
Wide Temp. Models: -40 to 75°C (-40 to 167°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Physical Characteristics
Weight MGate MB3170: 360 g
MGate MB3270: 380 g
Dimensions Without ears: 29 x 89.2 x 118.5 mm (1.14 x 3.51 x 4.67 in)
With ears extended: 29 x 89.2 x 124.5 mm (1.14 x 3.51 x 4.90 in)
Housing Plastic
Serial Interface
Connectors MB3170/3170I: DB9 male for RS-232, Terminal block for RS-422/485
MB3270/3270I: DB9 male x 2
Serial Standards RS-232/422/485, software selectable
RS-485 Data Direction Control ADDC® (automatic data direction control)
ESD Protection 15 KV for all signals
Number of Ports MB3170/3170I: 1
MB3270/3270I: 2
Pull High/Low Resistor for RS-485 1 KΩ, 150 KΩ
Terminator for RS-485 120 Ω
MTBF (mean time between failures) MGate MB3170: 210,794 hrs
MGate MB3270: 125,234 hrs
Serial Signals
RS-485-4w Tx+, Tx-, Rx+, Rx-, GND
RS-485-2w Data+, Data-, GND
RS-422 Tx+, Tx-, Rx+, Rx-, GND
Standards and Certifications
EMI EN 55022 Class A, FCC Part 15 Subpart B Class A
Safety UL 60950-1, EN 60950-1
Hazardous Location UL/cUL Class I Division 2 Groups A/B/C/D,
ATEX Zone 2
Shock IEC 60068-2-27
Vibration IEC 60068-2-6
EMS EN 55024,
EN 61000-4-2 (ESD) Level 3,
EN 61000-4-3 (RS) Level 3,
EN 61000-4-4 (EFT) Level 4,
EN 61000-4-5 (Surge) Level 3,
EN 61000-4-6 (CS) Level 3,
EN 61000-4-8,
EN 61000-4-11,
EN 61000-4-12
Freefall IEC 60068-2-23
Marine DNV
Warranty Period 5 years
Details See
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