MGate MB3180 , MB3280 & MB3480


Features and Benefits

  • Convert between Modbus TCP and Modbus RTU/ASCII Download Moxa’s MGate Gateway Brochure and White Paper
  • 1 Ethernet port and 1, 2, or 4 RS-232/422/485 ports
  • Supports 16 simultaneous TCP masters with up to 32 simultaneous requests per master
  • Easy hardware setup and configuration
  • Supports Moxa’s MXview industrial network management software via the MXview Plug-i



The MB3180, MB3280, and MB3480 are standard Modbus gateways that convert between Modbus TCP and Modbus RTU/ASCII protocols. Up to 16 simultaneous Modbus TCP masters are supported, with up to 31 RTU/ASCII slaves per serial port. For RTU/ASCII masters, up to 32 TCP slaves are supported.
Standard Modbus network integration
MGate MB3000 standard models include the MB3180, MB3280, and MB3480, and are designed for easy integration of Modbus TCP and RTU/ASCII networks. With these models, Modbus serial slave devices can be seamlessly incorporated into an existing Modbus TCP network, and Modbus TCP slaves can be made accessible to serial masters. The MB3180, MB3280, andMB3480 offer features that make network integration easy, customizable, and compatible with almost any Modbus network.

High density, cost effective gateway
The MGate MB3000 can effectively integrate networks with a high density of Modbus nodes. The MB3280 can manage up to 62 serial slave nodes, whereas the MB3480 can manage 124. Each RS-233/422/485 serial port can be individually configured for Modbus RTU or Modbus ASCII operation or even different baudrate, allowing both types of networks to be integrated with Modbus TCP within one package.


Ethernet Interface
Number of Ports 1
Speed 10/100 Mbps, Auto MDI/MDIX
Connector 8-pin RJ45
Magnetic Isolation Protection 1.5 KV built-in
Serial Interface
Number of Ports MB3180: 1MB3280: 2MB3480: 4
Serial Standards RS-232/422/485, software selectable
Connectors DB9 male
ESD Protection 15 KV for all signals
RS-485 Data Direction Control ADDC® (automatic data direction control)
Serial Communication Parameters
Data Bits 7, 8
Stop Bits 1, 2
Parity None, Even, Odd, Space, Mark
Flow Control RTS/CTS, DTR/DSR (RS-232 only)
Baudrate 50 bps to 921.6 Kbps
Serial Signals
RS-422 Tx+, Tx-, Rx+, Rx-, GND
RS-485-4w Tx+, Tx-, Rx+, Rx-, GND
RS-485-2w Data+, Data-, GND
Operation Modes RTU Slave, RTU Master, ASCII Slave, ASCII Master
Utilities MGate Manager for Windows 98/ME/NT/2000, Windows XP/2003/Vista/2008/7 x86/x64
Multi-master and Multi-drop Master mode: 32 TCP slavesSlave mode: 16 TCP masters (request queue 32-deep for each master)
Bonus Feature Smart Routing
Physical Characteristics
Housing Metal, IP30 protection
Weight MGate MB3180: 340 gMGate MB3280: 360 gMGate MB3480: 740 g
Dimensions Without ears:MB3180: 22 x 52 x 80 mm (0.87 x 2.05 x 3.15 in)MB3280: 22 x 77 x 111 mm (0.87 x 3.03 x 4.37 in)MB3480: 35.5 x 103 x 158 mm (1.40 x 4.06 x 6.22 in)With ears:MB3180: 22 x 75 x 80 mm (0.87 x 2.95 x 3.15 in)MB3280: 22 x 100 x 11
Environmental Limits
Operating Temperature 0 to 55°C (32 to 131°F)
Storage Temperature -20 to 70°C (-4 to 158°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Power Requirements
Input Voltage 12 to 48 VDC
Power Connector MGate MB3180: Power jackMGate MB3280/3480: Power jack and terminal block
Power Consumption MGate M3180: 200 mA (max.)MGate M3280: 250 mA (max.)MGate M3480: 385 mA (max.)
Standards and Certifications
Safety UL 60950-1, EN 60950-1
EMI EN 55022 Class A, FCC Part 15 Subpart B Class A
EMS EN 55024,EN 61000-4-2 (ESD) Level 2,EN 61000-4-3 (RS) Level 2,EN 61000-4-4 (EFT) Level 2,EN 61000-4-5 (Surge) Level 2,EN 61000-4-6 (CS) Level 2,EN 61000-4-8,

EN 61000-4-11,

EN 61000-4-12

MTBF (mean time between failures) MGate M3180: 628,376 hrsMGate M3280: 503,029 hrsMGate M3480: 295,812 hrs
Warranty Period 5 years
Details See