MGate MB3660 Series

8 and 16-port redundant Modbus gateways

moxa-mgate-mb3660-series-image-1-(1).jpg | Moxa
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Features and Benefits

  • Supports Auto Device Routing for easy configuration
  • Supports route by TCP port or IP address for flexible deployment
  • Innovative Command Learning for improving system performance
  • Supports agent mode for high performance through active and parallel polling of serial devices
  • Supports Modbus serial master to Modbus serial slave communications
  • 2 Ethernet ports with the same IP or dual IP addresses for network redundancy
  • microSD card for configuration backup/duplication and event logs
  • Accessed by up to 256 Modbus TCP clients
  • Connects up to Modbus 128 TCP servers
  • RJ45 serial interface (for “-J” models)
  • Serial port with 2 kV isolation protection (for “-I” models)
  • Dual VDC or VAC power inputs with wide power input range
  • Embedded traffic monitoring/diagnostic information for easy troubleshooting
  • Status monitoring and fault protection for easy maintenance


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The MGate MB3660 (MB3660-8 and MB3660-16) gateways are redundant Modbus gateways that convert between the Modbus TCP and Modbus RTU/ASCII protocols. They can be accessed by up to 256 TCP master/client devices, or connect to 128 TCP slave/server devices. The MGate MB3660 isolation model provides 2 kV isolation protection suitable for power substation applications. The MGate MB3660 gateways are designed to easily integrate Modbus TCP and RTU/ASCII networks. The MGate MB3660 gateways offer features that make network integration easy, customizable, and compatible with almost any Modbus network.

For large-scale Modbus deployments, MGate MB3660 gateways can effectively connect a large number of Modbus nodes to the same network. The MB3660 Series can physically manage up to 248 serial slave nodes for 8-port models or 496 serial slave nodes for 16-port models (the Modbus standard only defines Modbus IDs from 1 to 247). 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.

High Performance with Innovative Command Learning

The MGate MB3660 gateways support two communication modes: transparent mode and agent mode. For transparent mode, the gateway converts Modbus commands from Modbus TCP to Modbus RTU/ASCII, and vice versa, or from serial (master) to serial (slave). However, since only one Modbus protocol request-response action can be executed at any given time, each Modbus device has to wait its turn, resulting in poorer performance.

In order to provide better performance, the MGate MB3660 gateways are designed with an innovative Command Learning function, which can be activated with a single mouse click. Once activated, the gateway will learn and remember the Modbus commands it receives, and once a command has been learned, the gateway will act as though it were in agent mode, and actively send Modbus requests to the relevant Modbus devices. Since the data is saved in a different memory space that can be accessed by the SCADA system, the SCADA system can retrieve Modbus response data directly from the gateway’s memory, instead of waiting for the data to pass through the Modbus devices, dramatically increasing communication performance.

Auto-Device Routing for Easy Configuration (Patent Pending)

Moxa’s 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 that’s 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 reduces cost.

Modbus Gateway with Power and Ethernet Redundancy

For a complicated Modbus system, redundancy is extremely important. The MGate MB3660 Modbus gateways support redundancy for both the power input and Ethernet connection. The MGate MB3660 gateways come with dual AC or DC power inputs built in for power redundancy, and have dual Ethernet ports (with different IPs) for network redundancy. To accommodate different types of applications, the dual Ethernet ports can be configured in one of two ways:

  • Use the same IP for both Ethernet ports. In this case, the MGate MB3660 gateway will automatically switch to the backup LAN when the main LAN fails.

  • Use different IP addresses for each of the two Ethernet ports. In this case, Modbus clients/masters can use both Ethernet ports to communicate with Modbus RTU/ASCII slave devices at the same time.

  • 10/100BaseT(X) Ports (RJ45 connector)

    2 IP addresses
    Auto MDI/MDI-X connection

  • Industrial Protocols

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

  • Configuration Options

    Web Console (HTTP/HTTPS), Device Search Utility (DSU), Telnet Console

  • Management

    ARP, DHCP Client, DNS, HTTP, HTTPS, SMTP, SNMP Trap, SNMPv1/v2c/v3, TCP/IP, Telnet, UDP, NTP Client, RADIUS

  • MIB

    RFC1213, RFC1317

  • Time Management

    NTP Client

  • Console Port

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

  • No. of Ports

    MGate MB3660-8 Series: 8
    MGate MB3660-16 Series: 16

  • Connector

    MGate MB3660-8/16: DB9 male
    MGate MB3660-8/16-J: RJ45

  • Serial Standards

    R2-232/422/485 (software selectable)

  • Baudrate

    50 bps to 921.6 kbps

  • Data Bits

    7, 8

  • Parity

    None, Even, Odd, Space, Mark

  • Stop Bits

    1, 2

  • Flow Control

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

  • 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

    120 ohms

  • Isolation

    2 kV (I models)

  • RS-232


  • RS-422

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

  • RS-485-2w

    Data+, Data-, GND

  • RS-485-4w

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

  • Industrial Protocols

    Modbus RTU/ASCII Master, Modbus RTU/ASCII Slave

  • Configuration Options

    Serial Console

  • Functions Supported

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

  • Max. No. of Commands

    256 per serial port

  • Memory Size

    65535 bytes

  • Functions Supported

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

  • Max. No. of Commands


  • Memory Size

    65535 bytes

  • Max. No. of Client Connections


  • Max. No. of Server Connections


  • Input Voltage

    All models: Redundant dual inputs
    AC models: 100 to 240 VAC (47 to 63 Hz)
    DC models: 20 to 60 VDC (1.5 kV isolation)

  • No. of Power Inputs


  • Power Connector

    Terminal block (for DC models)

  • Power Consumption

    MGate MB3660-8-2AC: 144 mA @ 110 VAC
    MGate MB3660-8-J-2AC: 111 mA @ 110 VAC
    MGate MB3660-16-2AC: 178 mA @ 110 VAC
    MGate MB3660-16-J-2AC: 133 mA @ 110 VAC
    MGate MB3660I-8-2AC: 244 mA @ 110 VAC
    MGate MB3660I-16-2AC: 351 mA @ 110 VAC
    MGate MB3660-8-2DC: 312 mA @ 24 VDC
    MGate MB3660-16-2DC: 390 mA @ 24 VDC

  • Contact Current Rating

    Resistive load: 2 A @ 30 VDC

  • Housing


  • IP Rating


  • Dimensions (with ears)

    480 x 45 x 198 mm (18.90 x 1.77 x 7.80 in)

  • Dimensions (without ears)

    440 x 45 x 198 mm (17.32 x 1.77 x 7.80 in)

  • Weight

    MGate MB3660-8-2AC: 2731 g (6.02 lb)
    MGate MB3660-8-2DC: 2684 g (5.92 lb)
    MGate MB3660-8-J-2AC: 2600 g (5.73 lb)
    MGate MB3660-16-2AC: 2830 g (6.24 lb)
    MGate MB3660-16-2DC: 2780 g (6.13 lb)
    MGate MB3660-16-J-2AC: 2670 g (5.89 lb)
    MGate MB3660I-8-2AC: 2753 g (6.07 lb)
    MGate MB3660I-16-2AC: 2820 g (6.22 lb)

  • 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)

  • Safety

    EN 60950-1, UL 60950-1

  • EMC

    EN 55032/24

  • 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: 10 V/m
    IEC 61000-4-4 EFT: Power: 1 kV; Signal: 1 kV
    IEC 61000-4-5 Surge: Power: 2 kV; Signal: 1 kV
    IEC 61000-4-6 CS: 10 V
    IEC 61000-4-8 PFMF

  • Freefall

    IEC 60068-2-31

  • Shock

    IEC 60068-2-27

  • Vibration

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

  • Time

    MGate MB3660-8-2AC: 716,647 hrs
    MGate MB3660-8-2DC: 706,783 hrs
    MGate MB3660-8-J-2AC: 616,505 hrs
    MGate MB3660-16-2AC: 487,416 hrs
    MGate MB3660-16-2DC: 482,835 hrs
    MGate MB3660-16-J-2AC: 437,337 hrs
    MGate MB3660I-8-2AC: 224,851 hrs
    MGate MB3660I-16-2AC: 114,595 hrs

  • Standards

    Telcordia SR332

Software, Firmware, and Drivers

Name Type Version Operating System Release Date
MXview Trial Version
331.7 MB
Software Package v3.0
2019-03-21 Mar 21, 2019 Release notes
Firmware for MGate MB3660 Series
1.2 MB
Firmware v2.3
2019-01-15 Jan 15, 2019 Release notes
MXview plugin for MGate Series
2.8 MB
Software Package v2.5
2018-12-24 Dec 24, 2018 Release notes
MXconfig plugin for MGate Series
404.4 KB
Software Package v1.5
2018-12-23 Dec 23, 2018 Release notes
Moxa CLI Configuration Tool for Linux
8.1 MB
Utility v1.1
2018-11-16 Nov 16, 2018 Release notes
Moxa CLI Configuration Tool for Windows
1.4 MB
Utility v1.1
2018-11-15 Nov 15, 2018 Release notes
Device Search Utility
1.1 MB
Utility v2.2
2017-12-04 Dec 04, 2017 Release notes

Support Documents

Name Type Version Release Date
Moxa CLI Configuration Tool User's Manual
1.1 MB
Manual v2.0 2019-03-05 Mar 05, 2019
Manual for MGate MB3660 Series
7.1 MB
Manual v4.0 2018-12-26 Dec 26, 2018
Datasheet for MGate MB3660 Series
796.7 KB
Datasheet v1.0 2018-11-11 Nov 11, 2018
QIG for MGate MB3660 Series
918.1 KB
QIG v2.0 2017-11-22 Nov 22, 2017
3D CAD for MGate MB3660
44.0 MB
3D CAD 2017-11-22 Nov 22, 2017
3D CAD for MGate MB3660-J
3.0 MB
3D CAD 2017-11-22 Nov 22, 2017
3D CAD for MGate MB3660I
44.0 MB
3D CAD 2017-11-22 Nov 22, 2017
2D CAD for MGate MB3660-J
303.1 KB
2D CAD 2017-11-22 Nov 22, 2017
2D CAD for MGate MB3660
1.1 MB
2D CAD 2017-11-22 Nov 22, 2017
2D CAD for MGate MB3660I
378.8 KB
2D CAD 2017-11-22 Nov 22, 2017

Available Models (8)

Show Images
moxa-mgate-mb3660-8-2dc-image.jpg | MoxaMGate MB3660-8-2DCmoxa-mgate-mb3660-16-2dc-image.jpg | MoxaMGate MB3660-16-2DCmoxa-mgate-mb3660-8-2ac-image.jpg | MoxaMGate MB3660-8-2ACmoxa-mgate-mb3660-16-2ac-image.jpg | MoxaMGate MB3660-16-2AC
No. of Serial Ports816816
Serial ConnectorDB9 maleDB9 maleDB9 maleDB9 male
Serial Isolation
Input Voltage20-60 VDC (1.5 kV isolation)20-60 VDC (1.5 kV isolation)100-240 VAC (47-63 Hz)100-240 VAC (47-63 Hz)
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moxa-mgate-mb3660i-8-2ac-image.jpg | MoxaMGate MB3660I-8-2ACmoxa-mgate-mb3660i-16-2ac-image.jpg | MoxaMGate MB3660I-16-2ACmoxa-mgate-mb3660-8-j-2ac-image.jpg | MoxaMGate MB3660-8-J-2ACmoxa-mgate-mb3660-16-j-2ac-image.jpg | MoxaMGate MB3660-16-J-2AC
No. of Serial Ports816816
Serial ConnectorDB9 maleDB9 maleRJ45RJ45
Serial Isolation2 kV2 kV
Input Voltage100-240 VAC (47-63 Hz)100-240 VAC (47-63 Hz)100-240 VAC (47-63 Hz)100-240 VAC (47-63 Hz)
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MGate MB3660 Series

MGate MB3660-8-2DC

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MGate MB3660 Series

MGate MB3660-16-2DC

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MGate MB3660 Series

MGate MB3660-8-2AC

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MGate MB3660 Series

MGate MB3660-16-2AC

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MGate MB3660 Series

MGate MB3660I-8-2AC

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MGate MB3660 Series

MGate MB3660I-16-2AC

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MGate MB3660 Series

MGate MB3660-8-J-2AC

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MGate MB3660 Series

MGate MB3660-16-J-2AC

moxa-mgate-mb3660-16-j-2ac-image.jpg | Moxa

Buy online from our distributors