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Layer 2 Modular Managed Switch – IEC 61850-3 – 20x Gigabit ports – modular copper/fibre/PoE options – PRP/HSR redundancy – IEEE 1588 PTP – dual LV/HV power – Wide -10 to 60°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 MDS-G4020 is the standard temperature model of Moxa’s modular managed switch family, delivering up to 20 Gigabit ports in a compact chassis. With IEC 61850-3 and IEEE 1613 certification, it provides the high EMC immunity and rugged reliability demanded in substations and industrial networks.
It includes 4x fixed Gigabit ports plus 4x modular slots, supporting LM-7000H expansion cards for copper, fibre, PoE+, or PRP/HSR. This flexibility makes it suitable for both edge and aggregation roles. Two hot-swappable power module slots support redundant LV (24/48 VDC) or HV (110/220 VAC/VDC) supplies.
PRP and HSR redundancy (IEC 62439-3), Turbo Ring/Chain, and RSTP/MSTP provide resilient networking. Hardware IEEE 1588 PTP with IEC 61850-9-3 and IEEE C37.238 profiles ensures precision timing. MMS/IEC 61850-90-4 integration, along with an HTML5 web interface, simplifies SCADA connectivity and configuration.
With an operating temperature range of -10 to 60°C, the MDS-G4020 is a versatile, modular solution for substation automation, power grids, and industrial Ethernet applications that require flexible, high-density Gigabit connectivity.
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 20 Port Layer 2 Gigabit Modular Managed Ethernet Switch
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MDS-G4020
20 Port Layer 2 Gigabit Modular Managed Ethernet Switch
A customer in the nuclear sector wished to replace the rack computers at heart of their control system, as critical system components had gone out of support. The control system itself forms part of an essential cog in the nuclear supply chain, and is deployed in numerous locations around the world.