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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.
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.
Delivery & Returns
We offer a range of delivery options to suit your needs.
UK Mainland
Northern Ireland & Highlands
Ireland
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.
Moxa 28 Port Gigabit Modular Managed Ethernet Switch
Please complete the details below to receive your quote
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
Our customer required a modern, reliable long-lifetime panel PC solution for installation in an ROV control room. The main requirement of the project was to upgrade existing ROV control room hardware, while continuing to run a legacy piece of control software.