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RKS-G4028 Series

4 1GbE, 24 modular 1GbE-port (802.3bt PoE optional) Layer 2 modular managed Ethernet switches

Features and Benefits

  • Meets a wide range of demands from Fast Ethernet to full Gigabit industrial networks (up to 28 Gigabit ports)
  • Modular interfaces for flexible connector type combinations
  • Support for IEEE 802.3bt PoE for up to 90 W output per port
  • High EMC immunity compliant with IEC 61850-3 and IEEE 1613
  • Hardware-based IEEE 1588 PTP for high-precision time synchronization
  • Turbo Ring and Turbo Chain (recovery time < 20 ms @ 250 switches) If the port link speed is 1 Gigabit or higher, the recovery time is < 50 ms. , and STP/RSTP/MSTP for network redundancy
  • Supports MXstudio for easy, visualized industrial network management
  • IEC 62443-4-2 Security Level 2 certified
  • -40 to 75°C operating temperature range
Certifications
Overview
Specifications
Resources
Models
Contact Sales

Introduction

The RKS-G4028 Series is designed to meet the rigorous demands of mission-critical applications for industry and business, such as power substation automation systems (IEC 61850-3, IEEE 1613), railway applications (EN 50121-4), and factory automation systems. The RKS-G4028 Series’ Gigabit and Fast Ethernet backbone, redundant ring, and 24 VDC, 48 VDC, or 110/220 VDC/VAC dual isolated redundant power supplies increase the reliability of your communications and save on wiring costs.

The modular design of the RKS-G4028 Series also makes network planning easy, and allows greater flexibility by letting you install up to 28 Gigabit ports with various connector types.

Additional Features and Benefits

  • IEEE 1588v2 PTP (Precision Time Protocol) for network time synchronization

  • Command line interface (CLI) for quickly configuring major managed functions

  • IGMP snooping and GMRP for filtering multicast traffic

  • Port-based VLAN, IEEE 802.1Q VLAN, and GVRP to ease network planning

  • QoS (IEEE 802.1p/1Q and TOS/DiffServ) to increase determinism

  • IEEE 802.3ad, LACP for optimum bandwidth utilization

  • Line-swap fast recovery

  • TACACS+, IEEE 802.1X, SNMPv3, HTTPS, and SSH to enhance network security

  • SNMPv1/v2c/v3 for different levels of network management

  • RMON for proactive and efficient network monitoring

  • Bandwidth management prevents unpredictable network status with “Lock port” to restrict access to authorized MAC addresses

  • Port mirroring for online debugging

  • Automatic warning by exception through email and relay output

  • Automatic recovery of connected device’s IP addresses

  • Configurable by web browser, Telnet/serial console, CLI, Windows utility, and ABC-02 or ABC-03 automatic backup configurator

IEC 62443-4-2 Security Level 2 Certified

RKS-G4028 Series models are IEC 62443-4-2 Security Level 2 certified, enhancing cybersecurity in industrial networks.

L3 models: https://certificates.iecee.org/#/deliverables/CERT/1530510/view

All other models: https://certificates.iecee.org/#/deliverables/CERT/1530507/view

  • Alarm Contact Channels

    1 relay output with current carrying capacity of 2 A @ 24 VDC

  • Buttons

    Reset button

  • 10/100/1000BaseT(X) Ports (RJ45 connector)

    RKS-G4028-4GT models: 4

  • 100/1000BaseSFP Slots

    RKS-G4028-4GS models: 4
    RKS-G4028-PoE-4GS models: 4

  • Module

    There are 3 module slots on the switch. Users can select different types of modules to insert into the switch. The modules that can be selected include 8-port/6-port modules with 10/100/1000BaseT(X), 10/100BaseT(X), 100/1000BaseSFP, or 100BaseFX (SC/ST connector) interfaces.

    Refer to Expansion Modules in the Accessories section for a full list of supported interface modules.

  • Standards

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

  • Management

    ARP
    Back Pressure Flow Control
    DHCP Server/Client
    DHCP Relay Agent (Option 82)
    Fiber check
    Flow control
    HTTP
    HTTPS
    IPv4/IPv6
    Linkup Delay
    LLDP
    Private MIB
    Port Mirroring (SPAN, RSPAN)
    RARP
    RMON
    SFTP
    SMTP
    SNMP Trap
    SNMP Inform
    SNMPv1/v2c/v3
    Syslog
    Telnet
    TFTP

  • Filter

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

  • Redundancy Protocols

    Link Aggregation
    MRP
    MRP Interconnection
    MSTP
    Multiple Dual Homing
    Multiple Network Coupling
    Network Loop Protection
    Ring Coupling
    RSTP
    STP
    Tracking
    Turbo Chain
    Turbo Ring v2

  • Security

    Access control list
    Broadcast storm protection
    DHCP Snooping
    Dynamic ARP Inspection
    HTTPS/SSL
    IEEE 802.1AE MAC security
    IP Source Guard
    Login and password policy
    MAC authentication bypass
    RADIUS
    Rate Limit
    Secure boot
    SSH
    Static port lock
    Sticky MAC
    TACACS+
    Trust access control

  • Time Management

    IEEE 1588v2 PTP (hardware-based)
    NTP Authentication
    NTP Server/Client
    SNTP
    Supported power profiles: IEEE 1588 Default 2008, IEC 61850-9-3-2016, IEEE C37.238-2017

  • Protocols

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

  • Industrial Protocols

    EtherNet/IP
    Modbus TCP
    PROFINET

  • MIB

    P-BRIDGE MIB
    Q-BRIDGE MIB
    IEEE8021-SPANNING-TREE-MIB
    IEEE8021-PAE-MIB
    IEEE8023-LAG-MIB
    LLDP-EXT-DOT1-MIB
    LLDP-EXT-DOT3-MIB
    SNMPv2-MIB
    RMON MIB Groups 1, 2, 3, 9

  • Power Substation

    MMS
    1588 PTP Power Profile IEC 61850-9-3
    1588 PTP Power Profile C37.238-2017

    GOOSE Check

  • IGMP Groups

    1024

  • Jumbo Frame Size

    9.216 KB

  • MAC Table Size

    16 K

  • Max. No. of VLANs

    256

  • Packet Buffer Size

    1.5 MB

  • Priority Queues

    8

  • VLAN ID Range

    VID 1 to 4094

  • Storage Port

    USB Type A

  • Storage Port

    microSD card

  • LED Indicators

    PWR1, PWR2, STATE, FAULT, MSTR/HEAD, CPLR/TAIL, SYNC, EPS

  • Console Port

    RS-232 (RJ45)

  • Total PoE Power Budget

    300 W

  • Max. PoE Power Output per Port

    IEEE 802.3af: 15.4 W
    IEEE 802.3at: 30 W
    IEEE 802.3bt: 90 W

  • Input Voltage

    RKS-G4028-LV models: 24/48 VDC
    RKS-G4028-2LV models: 24/48 VDC (redundant power supplies)
    RKS-G4028-HV models: 110/220 VAC, 110/220 VDC
    RKS-G4028-2HV models: 110/220 VAC, 110/220 VDC (redundant power supplies)
    PoE models: 48 VDC (for the PoE system)

  • Operating Voltage

    RKS-G4028-LV/2LV models: 18 to 72 VDC
    RKS-G4028-HV/2HV models: 88 to 300 VDC, 85 to 264 VAC
    PoE models: 46 to 57 VDC (for the PoE system)

  • Overload Current Protection

    Supported

  • Reverse Polarity Protection

    Supported

  • Input Current

    RKS-G4028-LV/2LV models:
    Max. 2.53 A @ 24 VDC
    Max. 1.25 A @ 48 VDC

    RKS-G4028-HV/2HV models:
    Max. 0.55 A @ 110 VDC
    Max. 0.29 A @ 220 VDC
    Max. 1.01 A @ 110 VAC
    Max. 0.62 A @ 220 VAC

    EPS (PoE models only):
    Max. 7.50 A @ 48 VDC

  • Power Consumption (Max.)

    RKS-G4028-LV/2LV models:
    Max. 60.72 W @ 24 VDC
    Max. 60 W @ 48 VDC

    RKS-G4028-HV/2HV models:
    Max. 60.5 W @ 110 VDC
    Max. 63.8 W @ 220 VDC
    Max. 62.2 W @ 110 VAC
    Max. 64.1 W @ 220 VAC

    Note: These are the maximum power consumption ratings for the device with the maximum number of modules installed.
    Note: These are the maximum power consumption ratings for the device with the maximum number of modules installed.

  • IP Rating

    IP30

  • Dimensions

    440 x 44 x 296 mm (17.32 x 1.37 x 11.65 in)

  • Weight

    RKS-G4028-LV/HV models: 4900 g (10.80 lb)
    RKS-G4028-2LV/2HV models: 5200 g (11.46 lb)
    RKS-G4028-PoE-LV/HV models: 5000 g (11.02 lb)
    RKS-G4028-PoE-2LV/2HV models: 5300 g (11.68 lb)

  • Installation

    Rack mounting

  • Operating 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
    EN 61000-6-2/-6-4

  • 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 Voltage Dips & Interruptions

  • Industrial Cybersecurity

    IEC 62443-4-2 Security Level 2

  • Safety

    EN IEC 62368-1
    IEC 60950-1
    IEC 62368-1
    UL 61010
    UL 62368-1

  • Power Substation

    IEC 61850-3
    IEEE 1613

  • Railway

    EN 50121-4

  • Traffic Control

    NEMA TS2

  • Shock

    IEC 60068-2-27

  • Vibration

    IEC 60068-2-6

  • Freefall

    IEC 60068-2-32

  • Time

    RKS-G4028-4GT-HV models: 572,888 hours
    RKS-G4028-4GT-2HV models: 518,894 hours
    RKS-G4028-4GS-HV models: 529,925 hours
    RKS-G4028-4GS-2HV models: 483,436 hours
    RKS-G4028-4GT-LV models: 548,589 hours
    RKS-G4028-4GT-2LV models: 479,574 hours
    RKS-G4028-4GS-LV models: 508,639 hours
    RKS-G4028-4GS-2LV models: 449,160 hours
    RKS-G4028-PoE-4GS-HV models: 508,190 hours
    RKS-G4028-PoE-4GS-2HV models: 465,282 hours
    RKS-G4028-PoE-4GS-LV models: 488,598 hours
    RKS-G4028-PoE-4GS-2LV models: 433,472 hours

  • Standards

    Telcordia (Bellcore), GB

Software, Firmware, and Drivers

FILTER

All Firmware Software Package
Name Type Checksum Version Operating System Release Date
GSD file for RKS-G4000 Series Download
197.7 KB 		Software Package
SHA-512
v1.0
Aug 01, 2025 Aug 01, 2025 Release notes
Firmware for RKS-G4000 Series Download
56.5 MB 		Firmware
SHA-512
v5.0
Aug 01, 2025 Aug 01, 2025 Release notes
MIB file for RKS-G4000 Series Download
420.5 KB 		Software Package
SHA-512
v5.0
Aug 01, 2025 Aug 01, 2025 Release notes
EDS file for RKS-G4000 Series Download
132.9 KB 		Software Package
SHA-512
v2.0
Aug 01, 2025 Aug 01, 2025 Release notes
AOI file for RKS-G4000 Series Download
57.6 KB 		Software Package
SHA-512
v2.0
Aug 01, 2025 Aug 01, 2025 Release notes
GSD file for RKS-G4000 Series (L3 models) Download
197.7 KB 		Software Package
SHA-512
v1.0
Nov 08, 2024 Nov 08, 2024 Release notes
MIB file for RKS-G4000 Series (L3 models) Download
451.5 KB 		Software Package
SHA-512
v5.0
Nov 08, 2024 Nov 08, 2024 Release notes
Software Package for RKS-G4028 Series (MIB file) Download
403.8 KB 		Software Package
SHA-512
v4.0
Jun 28, 2023 Jun 28, 2023 Release notes
Firmware for RKS-G4028 Series Download
65.2 MB 		Firmware
SHA-512
v4.0
Jun 28, 2023 Jun 28, 2023 Release notes
Firmware for RKS-G4028 Series (L3 models) Download
66.7 MB 		Firmware
SHA-512
v4.0
Jun 28, 2023 Jun 28, 2023 Release notes

Support Documents

FILTER

All Datasheet Declaration Manual QIG
Name Type Version Release Date
Moxa Managed Switch MX-NOS (v5.x) User Manual Download
21.4 MB 		Manual v1.2 Mar 30, 2026 Mar 30, 2026
Datasheet for RKS-G4028 Series Download
1.1 MB 		Datasheet v2.2 Aug 01, 2025 Aug 01, 2025
FOSS Statement for MX-NOS v5.x Download
233.7 KB 		Declaration v1.1 Aug 01, 2025 Aug 01, 2025
Moxa Managed Switch MX-NOS (v5.x) Command Line Interface User Manual Download
6.8 MB 		Manual v1.1 Aug 01, 2025 Aug 01, 2025
QIG for RKS-G4028 Series Download
2.2 MB 		QIG v1.6 Apr 30, 2025 Apr 30, 2025
FOSS Statement for Various MDS, MDS4XGS, RKS, EDS Series Products Download
2.2 MB 		Declaration v1.0 Aug 14, 2024 Aug 14, 2024
Moxa Managed Switch Next-generation OS (v4.x) Layer 2 Command Line Interface User Manual Download
5.4 MB 		Manual v1.2 Jun 26, 2024 Jun 26, 2024
Moxa Managed Switch Next-generation OS (v4.x) Layer 2 User Manual Download
18.7 MB 		Manual v1.3 Jun 26, 2024 Jun 26, 2024
Declaration of Conformity for RKS-G4028 with RM-G4000 Module Series Download
302.1 KB 		Declaration v1.0 May 02, 2024 May 02, 2024
Moxa Managed Switch Next-generation OS (v4.x) Layer 3 Command Line Interface User Manual Download
1.6 MB 		Manual v1.0 Sep 26, 2023 Sep 26, 2023
Moxa Managed Switch Next-generation OS (v4.x) Layer 3 User Manual Download
3.1 MB 		Manual v1.0 Jun 28, 2023 Jun 28, 2023
IEC 62443-4-2 Security Level 2 Certification for RKS-G4028 With RM-G4000 Module Series Download
257.7 KB 		Declaration v1.0 Jun 14, 2022 Jun 14, 2022

Related Content

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All Application Note Video

Available Models (12)

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moxa-rks-g4028-4gs-lv-t-image.jpg | MoxaRKS-G4028-4GS-LV-T
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moxa-rks-g4028-4gt-hv-t-image.jpg | MoxaRKS-G4028-4GT-HV-T
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moxa-rks-g4028-4gt-2hv-t-image.jpg | MoxaRKS-G4028-4GT-2HV-T
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moxa-rks-g4028-4gs-hv-t-image.jpg | MoxaRKS-G4028-4GS-HV-T
Max. No. of Ports28282828
PoE Support––––
L3 Functionality––––
Input Voltage24/48 VDC110/220 VAC/VDC110/220 VAC/VDC110/220 VAC/VDC
Redundant Power Supplies––✓–
External Power Supply––––
Operating Temp.-40 to 75°C-40 to 75°C-40 to 75°C-40 to 75°C
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moxa-rks-g4028-4gs-2hv-t-image.jpg | MoxaRKS-G4028-4GS-2HV-T
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moxa-rks-g4028-4gt-lv-t-image.jpg | MoxaRKS-G4028-4GT-LV-T
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moxa-rks-g4028-4gt-2lv-t-image.jpg | MoxaRKS-G4028-4GT-2LV-T
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moxa-rks-g4028-4gs-2lv-t-image.jpg | MoxaRKS-G4028-4GS-2LV-T
Max. No. of Ports28282828
PoE Support––––
L3 Functionality––––
Input Voltage110/220 VAC/VDC24/48 VDC24/48 VDC24/48 VDC
Redundant Power Supplies✓–✓✓
External Power Supply––––
Operating Temp.-40 to 75°C-40 to 75°C-40 to 75°C-40 to 75°C
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moxa-rks-g4028-poe-4gs-hv-t-image.jpg | MoxaRKS-G4028-PoE-4GS-HV-T
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moxa-rks-g4028-poe-4gs-2hv-t-image.jpg | MoxaRKS-G4028-PoE-4GS-2HV-T
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moxa-rks-g4028-poe-4gs-lv-t-image.jpg | MoxaRKS-G4028-PoE-4GS-LV-T
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moxa-rks-g4028-poe-4gs-2lv-t-image.jpg | MoxaRKS-G4028-PoE-4GS-2LV-T
Max. No. of Ports28282828
PoE Support✓✓✓✓
L3 Functionality––––
Input Voltage110/220 VAC/VDC110/220 VAC/VDC24/48 VDC24/48 VDC
Redundant Power Supplies–✓–✓
External Power Supply✓✓✓✓
Operating Temp.-40 to 75°C-40 to 75°C-40 to 75°C-40 to 75°C
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