MGate MB3180/MB3280/MB3480 Series


  • Supports Auto Device Routing for easy configuration
  • Supports route by TCP port or IP address for flexible deployment
  • Converts between Modbus TCP and Modbus RTU/ASCII protocols
  • 1 Ethernet port and 1, 2, or 4 RS-232/422/485 ports
  • 16 simultaneous TCP masters with up to 32 simultaneous requests per master
  • Easy hardware setup and configuration


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

The three standard MGate models (MB3180, MB3280, and MB3480) 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, and MB3480 offer features that make network integration easy, customizable, and compatible with almost any Modbus network.

High Density, Cost-Effective Gateways

The MGate MB3000 gateways can effectively connect a high density of Modbus nodes to the same network. The MB3280 can manage up to 62 serial slave nodes, and the MB3480 can manage up to 124 serial slave nodes. Each RS-232/422/485 serial port can be configured individually for Modbus RTU or Modbus ASCII operation and for different baudrates, allowing both types of networks to be integrated with Modbus TCP through one Modbus gateway.

Auto-Device Routing for Easy Configuration (Patent Pending)

Moxas Auto-Device Routing function helps eliminate many of the problems and inconveniences encountered by engineers who need to configure large numbers of Modbus devices. A single mouse click is all thats required to set up a slave ID routing table and configure Modbus gateways to automatically detect Modbus requests from a supervisory control and data acquisition (SCADA) system. By removing the need to manually create the slave ID routing table, the Auto-Device Routing function saves engineers significant time and cost.

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Additional information

Ethernet Software Features

Industrial Protocols
Modbus TCP Client (Master), Modbus TCP Server (Slave)

Configuration Options
Web Console (HTTP), Device Search Utility (DSU), MGate Manager, Telnet Console

ARP, DHCP Client, DNS, HTTP, HTTPS (MGate MB3180 Excluded), SMTP (MGate MB3180 Excluded), SNMP Trap (MGate MB3180 Excluded), SNMPv1/v2c/v3, TCP/IP, Telnet, UDP, NTP Client (MGate MB3180 Excluded)

RFC1213, RFC1317

Time Management
NTP Client (MGate MB3180 Excluded)

Serial Interface

No. of Ports
MGate MB3180: 1
MGate MB3280: 2
MGate MB3480: 4

DB9 male

Serial Standards
RS-232/422/485 (software selectable)

50 bps to 921.6 kbps

Data Bits
7, 8

None, Even, Odd, Space, Mark

Stop Bits
1, 2

Flow Control
DTR/DSR, RTS Toggle (RS-232 only), RTS/CTS

RS-485 Data Direction Control
ADDC® (automatic data direction control)

Pull High/Low Resistor for RS-485
1 kilo-ohm, 150 kilo-ohms

Terminator for RS-485
MGate MB3180: None
MGate MB3280/MB3480: 120 ohms

Power Parameters

Input Voltage
12 to 48 VDC

Input Current
MGate MB3180: 200 mA @ 12 VDC
MGate MB3280: 250 mA @ 12 VDC
MGate MB3480: 385 mA @ 12 VDC

Power Connector
MGate MB3180: Power jack
MGate MB3280/MB3480: Power jack and terminal block

Enviromental Limits

Operating Temperature
0 to 60°C (32 to 140°F)

Storage Temperature (package included)
-40 to 85°C (-40 to 185°F)

Ambient Relative Humidity
5 to 95% (non-condensing)