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Full Gigabit modular managed rackmount switch – 4× 1G RJ45 uplinks – up to 28× Gigabit ports via modules – dual 110/220 VDC/VAC inputs – IEC 61850-3 & IEEE 1613 – hardware 1588v2 PTP – 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-G4028-4GT-2HV-T enhances backbone availability with dual isolated 110/220 VDC/VAC inputs, enabling seamless power failover in substations and harsh industrial sites. It offers four fixed 1G RJ45 uplinks plus three hot-swappable module bays to scale toward 28 Gigabit interfaces across copper, SFP, or FX, letting you evolve from aggregation to dense access without rewiring the chassis.
Certified to IEC 61850-3 and IEEE 1613, the switch withstands extreme EMI/EMS and temperature swings (-40 to 75°C). Hardware-based IEEE 1588v2 PTP ensures tight time alignment for GOOSE, sampled values, and time-sensitive automation flows. Network resiliency features include Turbo Ring/Chain (<20 ms) at scale, plus STP/RSTP/MSTP, LACP, Loop Protection, Dual-Homing, and Ring Coupling to accommodate complex, layered topologies.
Security and integrity follow IEC 62443-aligned practices: secure boot, 802.1X, RADIUS/TACACS+, HTTPS/SSH, ACLs, sticky MAC, MAC authentication bypass, and rate limiting. Deterministic behaviour is maintained with eight hardware queues, quality of service/DSCP, VLAN/GVRP, and IGMP Snooping/Querier.
Admins benefit from comprehensive tooling—web/CLI, SNMPv1/v2c/v3 with traps/informs, RMON, LLDP, Syslog, SFTP/TFTP—and physical alarm relays for event handling. Optional ABC-02/03 media enables rapid configuration backup/restore and firmware lifecycle management, while USB/MicroSD storage supports logging and file ops.
For operators who cannot compromise on uptime, the RKS-G4028-4GT-2HV-T merges dual-HV power redundancy, modular port growth, and substation-class immunity—ideal for control centres, bays, and high-availability field cabinets.
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 – 4x Gigabit RJ45 Ports – Redundant 2x 110V to 220V AC Input
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RKS-G4028-4GT-2HV-T
28 Port Gigabit Modular Managed Ethernet Switch – 4x Gigabit RJ45 Ports – Redundant 2x 110V to 220V AC Input
London Underground signalling engineers required a number of panel PCs for temporary use as in-cab Signal Interface Displays (SIDs) in test trains, to allow the engineers to test the information being sent to the train from the new Thales computer-based signalling system.