RKS-G4028 Series - Moxa 28 Port Gigabit Modular Managed Ethernet Switch

  • RKS-G4028-4GS-2HV-T
  • RKS-G4028-4GS-HV-T
  • RKS-G4028-4GS-LV-T
  • RKS-G4028-4GS-2LV-T
  • RKS-G4028-4GT-2HV-T
  • RKS-G4028-4GT-2LV-T
  • RKS-G4028-4GT-HV-T
  • RKS-G4028-4GT-LV-T
  • RKS-G4028-POE-4GS-2HV-T
  • RKS-G4028-POE-4GS-2LV-T
  • RKS-G4028-POE-4GS-HV-T
  • RKS-G4028-POE-4GS-LV-T

IEC 61850-3 modular managed rackmount switch – 24× Gigabit copper – 4× Gigabit SFP uplinks – 24/48 VDC input – IEC 62443 cybersecurity – Extended wide -40 to 75°C operation

Moxa Products Supplied To the UK, From the UK

As an official UK distributor of Moxa products since 2014, we at Impulse are proud to be affiliated with Moxa Technical College. Our partnership enables us to provide comprehensive in-house training and first-line technical support, and our team of Industrial Internet of Things (IIoT) specialists are fully equipped to guide you through every step of the process. Whether you require assistance with installation, troubleshooting or anything else, our team is ready to assist you.

Technical Support from Impulse

Our commitment doesn't end with the initial setup—we provide lifelong technical support for the entire range of Moxa products at no extra charge. Count on us to ensure that your network operates at its peak performance throughout its entire lifespan.

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The RKS-G4028 Series delivers a fully modular, substation-grade Ethernet platform for demanding industrial backbones. Designed for long-life reliability in power, rail, and factory environments, each chassis provides three hot-swappable module bays to mix 8-port/6-port interface cards, allowing up to 28 Gigabit interfaces across copper RJ45, fibre SFP, or 100BaseFX (SC/ST) as your layout evolves. Select models include four fixed 1G uplinks (RJ45 or SFP) and optional IEEE 802.3bt PoE (up to 90W per port, with a 300W system budget on PoE variants) to simplify edge powering.

High EMC immunity verified to IEC 61850-3 and IEEE 1613 keeps traffic flowing amid severe electrical noise, supported by fanless IP30 construction and a -40 to 75°C operating range. Hardware-based IEEE 1588v2 PTP enables sub-microsecond time sync for protection, measurement, and motion applications, while Turbo Ring and Turbo Chain deliver sub-20 ms recovery at scale (up to 250 switches). Standard STP/RSTP/MSTP, Link Aggregation, and Loop Protection add topology flexibility.

Robust security aligns with IEC 62443-4-1/-4-2 development and compliance, featuring 802.1X, RADIUS/TACACS+, HTTPS/SSH, MAC authentication bypass, ACLs, sticky MAC, and secure boot. Deterministic performance is maintained with QoS, IGMP Snooping/Querier, VLAN/GVRP, and eight hardware queues. Powerful management (CLI, web, SNMPv1/v2c/v3, RMON, LLDP, Syslog, SFTP/TFTP) accelerates deployment, while alarms, dual isolated power options (24/48 VDC or 110/220 VDC/VAC), and optional ABC-02/03 config tools streamline maintenance.

Whether you’re modernising a substation LAN, segmenting a railway's side, or consolidating a factory backbone, the RKS-G4028 Series combines modular flexibility, precise timing, and substation-class resiliency to anchor mission-critical networks.

Device Type Managed Switch
Ethernet Ports 28
Input Voltage 24V to 48V DC or 110V to 220V DC
IP Rating IP30
Market Certifications IEC 62443-4-2, NEMA-TS2, EN 50121-4, IEC 61850-3, IEEE 1613, FCC, CE, RoHS
Operating Temperature -40°C to +75°C
Ethernet Speed 10/100/1000 Mbps
Fibre Ports 4x SFP
Fibre Speed 100/1000 Mbps
Mounting Rack-mount
PoE Power Budget 30W (90W per channel IEEE 802.3bt, 30W per Channel IEEE 802.3at)
Warranty 5 years

Delivery & Returns

We offer a range of delivery options to suit your needs.

UK Mainland

  • Free next day shipping on all orders over £150 (UK Mainland only)
  • Next day delivery - £12 (UK Mainland only)
  • Postcode Exclusions: ZE, KW15+ PO 30, JE, HS, GY, TR, IM, AB31+, KW 1-14, FK19+, PA20+, IV, PH

Northern Ireland & Highlands

  • Northern Ireland (2 business day delivery) - from £40 (UKIMS required for NI)
  • Highlands delivery (up to 3 business days) - from £30

Ireland

  • Ireland Economy (2-5 business days) - from £35
  • Ireland Priority (1-3 business days) - from £50

RMA

In order to process returned goods, Impulse Embedded Limited uses an internal RMA system. Before returning goods for any reason, please contact Impulse Embedded Limited (returns@impulse-embedded.co.uk) to request an RMA number. Please confirm the reason for the return of the goods, providing the Serial Number, Product Code, and Impulse Embedded Limited Invoice Number (if known).

When returning goods, please ensure they are suitably packed so as to avoid damage, are in the original packaging, along with all accessories, with the outer packaging marked with the RMA number. It is recommended that you use a signed delivery service, as goods lost in transit are not the responsibility of Impulse Embedded Limited.

Please do not write the RMA number on the goods or on the original packaging. Impulse Embedded Limited may refuse returned goods and return them if they arrive without an RMA number, or not in the original packaging.

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Moxa 28 Port Gigabit Modular Managed Ethernet Switch

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Select the products of this series that you wish to request quantity or project pricing, or lead time information for:

  • RKS-G4028-4GS-2HV-T

    28 Port Gigabit Modular Managed Ethernet Switch – 4x Gigabit SFP Ports – Redundant 2x 110V to 220V AC Input

  • RKS-G4028-4GS-HV-T

    28 Port Gigabit Modular Managed Ethernet Switch – 4x Gigabit SFP Ports – 110V to 220V AC Input

  • RKS-G4028-4GS-LV-T

    28 Port Gigabit Modular Managed Ethernet Switch – 4x Gigabit SFP Ports – 18V to 72V DC Input

  • RKS-G4028-4GS-2LV-T

    28 Port Gigabit Modular Managed Ethernet Switch – 4x Gigabit SFP Ports – Redundant 2x 18V to 72V DC Input

  • RKS-G4028-4GT-2HV-T

    28 Port Gigabit Modular Managed Ethernet Switch – 4x Gigabit RJ45 Ports – Redundant 2x 110V to 220V AC Input

  • RKS-G4028-4GT-2LV-T

    28 Port Gigabit Modular Managed Ethernet Switch – 4x Gigabit RJ45 Ports – Redundant 2x 18V to 72V DC Input

  • RKS-G4028-4GT-HV-T

    28 Port Gigabit Modular Managed Ethernet Switch – 4x Gigabit RJ45 Ports – 110V to 220V AC Input

  • RKS-G4028-4GT-LV-T

    28 Port Gigabit Modular Managed Ethernet Switch – 4x Gigabit RJ45 Ports – 18V to 72V DC Input

  • RKS-G4028-POE-4GS-2HV-T

    28 Port Gigabit Modular Managed Ethernet Switch – PoE – 4x Gigabit SFP Ports – Redundant 2x 110V to 220V AC Input

  • RKS-G4028-POE-4GS-2LV-T

    28 Port Gigabit Modular Managed Ethernet Switch – PoE – 4x Gigabit SFP Ports – Redundant 2x 18V to 72V DC Input

  • RKS-G4028-POE-4GS-HV-T

    28 Port Gigabit Modular Managed Ethernet Switch – PoE – 4x Gigabit SFP Ports – 110V to 220V AC Input

  • RKS-G4028-POE-4GS-LV-T

    28 Port Gigabit Modular Managed Ethernet Switch – PoE – 4x Gigabit SFP Ports – 18V to 72V DC Input

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