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Viper Unmanaged & Managed Ethernet Switches

To meet the growing demand for reliable onboard railway communications networks, Westermo manufacturers a new generation of industrial Ethernet switches that provide highly robust networks and long term field operation. Specifically designed for onboard applications around the “Westermo IP train concept”, the new Viper are twelve-port switches, designed to deliver a complete solution for onboard control systems, including improved levels of reliability and simplified network design, installation and maintenance.

The Westermo IP train concept provides a complete EN50155 Ethernet switch and routing solution providing for an ultra-reliable network backbone addressing the needs of the intelligent trains. This concept has been developed in answer to the many unique requirements of the rail industry which can be solved using a suite of IP protocols delivered by the Westermo Operating System - WeOS.

Onboard rolling stock applications present one of the toughest environments for any electronic device. The Viper series exceeds the EN 50155 onboard railway standard for electronic equipment, which encompasses not only EMC requirements, but also shock, vibration, extended temperature range and humidity. The switches have also been designed to achieve the highest mean time between failures of up to 900,000 hours, ensuring the extremely long-term and reliable field operation that is expected within the railway industry.

The Viper series incorporates M12 connectors that are integrated into the housing to reduce size and further protect against vibration. With an ultra-robust design, sealed to IP67 and vibration resistant to military standards, these units are ideal for situations where mechanical stress, moisture, condensation; dirt or continuous vibrations (such as those produced by engine) could adversely affect the function of standard Ethernet switches. A unique Gore-Tex membrane is used to prevent condensation build up by normal climatic day/night cycling. The Viper-212 is also very compact and ultra-thin, enabling installation within the confined spaces of railcar panels.

The WeOS operating system, incorporated into the Viper is able to balance data traffic on the network to maintain maximum throughput and stability. The introduction of increased data traffic from new cameras and video stream will therefore not affect the stability of the entire network. In the event of any link or hardware failure, Westermo’s unique FRNT technology is able to re-configure a large network in 20ms.

For easy configuration, the Ethernet switches can be safely accessed from anywhere in the network, or directly via a console port on the Viper switch or an Ethernet or USB port on the RedFox switch. The configuration can be backed up and restored in seconds using a using a special M12 USB memory stick. An easy to use, secure web configuration interface simplifies the setting up of a redundant ring network.

Westermo offers three distinct levels of functionality in the Viper:

  • Viper 212A is a managed layer 3 routing switch,
  • Viper 112A offers managed layer 2 switching functionality and the
  • Viper 012 is an unmanaged solution.

These different levels of software functionality allow users to select the most appropriate level of functionality for their network whilst still having hardware that meets the toughest environmental challenges.

Unmanaged Viper Switches  
Layer 2 Viper Switches - with WeOS  
Layer 3 Viper Routers - with WeOS      

What do the IP ratings mean?

They are a combination of numbers that indicate level of protection against solids and liquids. The first number represents the level of protection against solid materials. The second number represents the level of protection against liquids. The table below provides definitions for each number in relation to each class of material. We will apply the ratings for the Viper 408 and Moxa TN5508-LV-LV-T in order to provide understanding for this comparison:

Viper 408 - IP65 (Solid Protection = Totally protected against dust; Liquid Protection = Protected against low pressure jets if water from all directions - limited ingress permitted)

Moxa TN5508-LV-LV-T = IP54 (Solid Protection = Protected against dust - limited ingress (no harmful deposit); Liquid Protection = Protected against sprays from all directions - limited ingress permitted)

By the standards provided below, the Viper 408 provides superior protection for demanding enviroments.

1st Number (Solids) Definition of Protection 2nd Number (Liquids) Definition of Protection
0 No protection 0 No protection
1 Protected against solids objects over 50mm (e.g. accidental touch by hands 1 Protected against vertically falling drops of water
2 Protected against solids objects over 12mm (e.g. fingers) 2 Protected against direct sprays up to 15o from the vertical
3 Protected against solids objects over 2.5mm (e.g. tools and wires) 3 Protected against direct sprays up to 60o from the vertical
4 Protected against solids objects over 1mm (e.g. tools, wires and small wires 4 Protected against sprays from all directions - limited ingress permitted
5 Protected against dust - limited ingress (no harmful deposit) 5 Protected against low pressure jets if water from all directions - limited ingress permitted
6 Totally protected against dust 6 Protected against strong jets of water e.g. for use on shipdecks - limited ingress permitted
    7 Protected against the effects of temporary immersion between 15cm and 1m. Duration of test 30 minutes
    8 Protected against long periods of immersion under pressure
Cat5 Cordset
Field Attachments
Industrial Recepticles

Got Cordsets!!!

Contact ESI with your specifications for your M12 requirements.

We offer the synergy of putting together your Ethernet Switch / Router with the cables you need for your application.

One Source.

One Solution.

Industrial Tees & Spliters
Passive Distribution Block
Cat6 Cordset


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