MDS-G4020 Series

20G-port Layer 2 full Gigabit modular managed Ethernet switches

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Features and Benefits

  • Multiple interface type 4-port modules for greater versatility
  • Easy replacement of defect ports to minimize downtime and MTTR
  • Passive backplane to minimize the risk of malfunction
  • Ultra-compact size for easy installation
  • Rugged die-casting design for use in harsh environments
  • HTML5 for a better user experience


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The MDS-G4020 Series modular switches support up to 20 Gigabit ports, including 4 embedded ports, 4 interface module expansion slots, and 2 power module slots to ensure sufficient flexibility for a variety of applications. The highly compact MDS-G4000 Series is designed to meet evolving network requirements, ensuring effortless installation and maintenance, and features a hot-swappable module design that enables you to easily change or add modules without shutting down the switch or interrupting network operations.

The multiple Ethernet modules (RJ45, SFP, and PoE+) and power units (24/48 VDC, 110/220 VAC/VDC) provide even greater flexibility as well as suitability for different operating conditions, delivering an adaptive full Gigabit platform that provides the versatility and bandwidth necessary to serve as an Ethernet aggregation/edge switch. Featuring a compact design that fits in confined spaces, multiple mounting methods, and convenient tool-free module installation, the MDS-G4000 Series switches enable versatile and effortless deployment without the need for highly skilled engineers. With multiple industry certifications and a highly durable housing, the MDS-G4000 Series can reliably operate in tough and hazardous environments such as power substations, mining sites, ITS, and oil and gas applications. Support for dual power modules provides redundancy for high reliability and availability while LV and HV power module options offer additional flexibility to accommodate the power requirements of different applications.

In addition, the MDS-G4000 Series features an HTML5–based, user-friendly web interface providing a responsive, smooth user experience across different platforms and browsers.

  • Pre-installed Modules

    4 embedded Gigabit ports

  • Module

    4 slots for optional 4-port FE/GE modules

  • Slot Combination

    See the LM-7000H module series datasheet for more information

  • Standards

    IEEE 802.3 for 10BaseT
    IEEE 802.3u for 100BaseT(X) and 100BaseFX
    IEEE 802.3ab for 1000BaseT(X)
    IEEE 802.3z for 1000BaseX
    IEEE 802.3x for flow control
    IEEE 802.3ad for Port Trunk with LACP
    IEEE 802.1Q for VLAN Tagging
    IEEE 802.1D-2004 for Spanning Tree Protocol
    IEEE 802.1w for Rapid Spanning Tree Protocol
    IEEE 802.1p for Class of Service
    IEEE 802.1X for authentication

  • Filter

    GMRP, GVRP, GARP, 802.1Q VLAN, IGMP Snooping v1/v2/v3, IGMP Querier

  • Management

    IPv4/IPv6, Flow control, Back Pressure Flow Control, DHCP Server/Client, ARP, RARP, LLDP, Port Mirror, Linkup Delay, SMTP, SNMP Trap, SNMP Inform, SNMPv1/v2c/v3, RMON, TFTP, SFTP, HTTP, HTTPS, Telnet, Syslog, Private MIB

  • MIB


  • Redundancy Protocols

    STP, RSTP, Turbo Ring v2, Turbo Chain, Ring Coupling, Dual-Homing, Link Aggregation

  • Security

    Broadcast storm protection, Rate Limit, Trust access control, Static Port Lock, MAC Sticky, HTTPS/SSL, SSH, RADIUS, TACACS+, Login and Password Policy

  • Time Management

    SNTP, NTP Server/Client, NTP Authentication

  • Protocols

    IPv4/IPv6, TCP/IP, UDP, ICMP, ARP, RARP, TFTP, DNS, NTP Client, DHCP Server, DHCP Client, 802.1X, QoS, HTTPS, HTTP, Telnet, SMTP, SNMPv1/v2c/v3, RMON, Syslog

  • MAC Table Size

    16 K

  • Max. No. of VLANs


  • VLAN ID Range

    VID 1 to 4094

  • IGMP Groups


  • Priority Queues


  • Packet Buffer Size

    12 Mbits

  • Console Port

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

  • USB Connector

    USB Type A (Reserved)

  • Digital Input Channels

    1 (On MGMT Module)

  • Digital Inputs

    +13 to +30 V for state 1
    -30 to +3 V for state 0
    Max. input current: 8 mA

  • Alarm Contact Channels

    3 (On MGMT, PWR1, PWR2 Module)
    Relay output with current carrying capacity of 2 A @ 30 VDC

  • Input Voltage

    Isolated redundant power module

    with PWR-LV-P48 installed:
    24/48 VDC for the switch system
    48 VDC for PoE system (53 to 57 VDC is recommended for PoE+ devices)

    with PWR-HV-P48 installed:
    110/220 VDC/VAC for the switch system
    48 VDC for PoE system (53 to 57 VDC is recommended for PoE+ devices)

  • Operating Voltage

    with PWR-LV-P48 installed:
    18 to 72 VDC for the switch system
    46 to 57 VDC for PoE systems

    with PWR-HV-P48 installed:
    88 to 300 VDC, 90 to 264 VAC for the switch system
    46 to 57 VDC for PoE systems

  • Input Current

    with PWR-LV-P48 installed:
    PWR input current (switch system)
    Max. 0.53 A @ 24 VDC
    Max. 0.28A @ 48 VDC

    with PWR-HV-P48 installed:
    PWR input current (switch system)
    Max. 0.11 A @ 110 VDC
    Max. 0.06 A @ 220 VDC
    Max. 0.29 A @ 110 VAC
    Max. 0.18 A @ 220 VAC

  • Overload Current Protection


  • Reverse Polarity Protection


  • IP Rating


  • Dimensions

    176 x 115 x 163.25 mm (6.93 x 4.53 x 6.44 in)

  • Weight

    2500 g (5.51 lb)

  • Installation

    DIN-rail mounting, Wall mounting (with optional kit)

  • Operating Temperature

    Standard Temperature: -10 to 60°C (-14 to 140°F)
    Wide Temperature: -40 to 75°C (-40 to 167°F)

  • Storage Temperature (package included)

    -40 to 85°C (-40 to 185°F)

  • Ambient Relative Humidity

    5 to 95% (non-condensing)

  • EMC

    EN 55032/35

  • EMI

    CISPR 32, FCC Part 15B Class A

  • EMS

    IEC 61000-4-2 ESD: Contact: 8 kV; Air: 15 kV
    IEC 61000-4-3 RS: 80 MHz to 1 GHz: 20 V/m
    IEC 61000-4-4 EFT: Power: 4 kV; Signal: 4 kV
    IEC 61000-4-5 Surge: Power: 4 kV; Signal: 4 kV
    IEC 61000-4-6 CS: 10 V
    IEC 61000-4-8 PFMF
    IEC 61000-4-11

  • Safety

    EN 62368-1

  • Railway

    EN 50121-4

  • Traffic Control

    NEMA TS2

  • Vibration

    IEC 60068-2-6

  • Shock

    IEC 60068-2-27

  • Freefall

    IEC 60068-2-31

  • Time

    1,007,790 hrs

  • Standards

    Telcordia SR332

Software, Firmware, and Drivers


Name Type Version Operating System Release Date
Firmware for MDS-G4020 Series
56.5 MB
Firmware v1.1
Oct 26, 2020 Oct 26, 2020 Release notes
SNMP MIB File for MDS-G4000 Series
337.9 KB
Software Package v1.0
Jun 01, 2020 Jun 01, 2020 Release notes

Support Documents

Name Type Version Release Date
Moxa Next-generation OS Command Line Interface Manual
2.1 MB
Manual v1.1 Oct 26, 2020 Oct 26, 2020
Datasheet for MDS-G4020 Series
981.2 KB
Datasheet v1.0 Jun 01, 2020 Jun 01, 2020
Moxa Managed Switch Next-generation OS Manual
8.2 MB
Manual v1.0 Jun 01, 2020 Jun 01, 2020
QIG for MDS-G4000 Series
1.3 MB
QIG v1.1 Jun 01, 2020 Jun 01, 2020
2D CAD for MDS-G4020 Series
1.8 MB
2D CAD Mar 31, 2020 Mar 31, 2020

Available Models (2)

Show Images
moxa-mds-g4020-image.jpg | MoxaMDS-G4020moxa-mds-g4020-t-image.jpg | MoxaMDS-G4020-T
Total No. of Ports2020
100/1000Base SFP SlotsUp to 16Up to 16
10/100/1000BaseT(X) Ports RJ45 ConnectorUp to 20Up to 20
PoE 10/100/1000BaseT(X) Ports RJ45 ConnectorUp to 16Up to 16
10/100BaseT(X) Ports RJ45 ConnectorUp to 16Up to 16
PoE 10/100BaseT(X) Ports RJ45 ConnectorUp to 16Up to 16
Operating Temp.-10 to 60°C-40 to 75°C
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MDS-G4020 Series


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Buy online from our distributors

MDS-G4020 Series


moxa-mds-g4020-t-image.jpg | Moxa

Buy online from our distributors