Computing
Displays
Networking
DAQ & Control
Solutions
About Us
EN 50155 M12 Managed Switch – 12x Fast Ethernet M12 – 4x Gigabit uplinks – bypass relay – 24–110 VDC – 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 TN-4516A-4GTXBP-WV-T is an EN 50155-compliant managed switch equipped with bypass relay functionality for uninterrupted railway networking. It provides 12x Fast Ethernet M12 ports and 4x Gigabit uplinks, balancing local device access with high-capacity backbone connectivity.
Bypass relay technology ensures communication continuity by bridging traffic even during power loss or device failure, supporting critical safety applications in rolling stock and wayside infrastructure. Dual isolated 24–110 VDC power inputs provide redundant supply resilience, while the -40 to 75°C operating range guarantees reliable service under extreme conditions.
The switch is certified to meet the mandatory test requirements of EN 50155 for temperature, vibration, surge, insulation, and ESD, making it rail-ready. Rugged M12 connectors provide shock-resistant cabling, ensuring stability in high-vibration environments.
Network resiliency is enhanced by Turbo Ring and Turbo Chain (<20 ms recovery) and standards-based RSTP/MSTP. Security features such as IEEE 802.1X, SSH, TACACS+, and HTTPS provide strong protection against unauthorised access. Advanced Layer 2 functions include VLANs, Quality of Service, IGMP snooping, Ethernet/IP, and Modbus TCP.
Designed for long-term deployment in trains and rail infrastructure, the TN-4516A-4GTXBP-WV-T combines bypass relay protection, robust M12 connectivity, and proven EN 50155 compliance.
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 16 Port EN 50155 Rail Certified Managed Ethernet Switch – 12x Fast Ethernet – 4x Gigabit Ethernet – Bypass Relay
Please complete the details below to receive your quote
Select the quantity you wish to request pricing or lead time information for:
TN-4516A-4GTXBP-WV-T
16 Port EN 50155 Rail Certified Managed Ethernet Switch – 12x Fast Ethernet – 4x Gigabit Ethernet – Bypass Relay
Our customer was looking for ways to improve efficiency and reliability, and reduce operation costs and overheads for their manufacturing facility. The initial step in this transformation was to add additional monitoring and measurements to several areas of their facility to allow the collection of usage data from older machinery for analysis. The machinery to be analysed would be located in many areas of the complex, with some sitting in concrete outbuildings far from the source of the main network.