Product category:
Plant- and Machine-Wide Communications
News Release from: Westermo Data Communications | Subject: Lynx400 industrial Ethernet switches
Edited by the Engineeringtalk Editorial
Team on 24 August 2007
Ethernet switch order received for
motorway
65 Lynx400 industrial Ethernet switches will support an industrial Ethernet network that will manage safety information on the new A75 motorway in France.
Westermo Data Communications has received an order for 65 of its Lynx400 ultra-rapid reconfiguration industrial Ethernet switches to support an industrial Ethernet network that will manage safety information on the new A75 motorway in France The A75, also known as "La Meridienne", is the panoramic motorway between Clermont-Ferrand and Beziers, which provides a new North to South route in the region of the Massif Central made famous by the new Millau multi-span cable-stayed viaduct which it runs over
This article was originally published on Engineeringtalk on 30 May 2003 at 8.00am (UK)
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In a forthcoming project, the networked safety information system including variable message signs (VMS), weather stations, vehicle counting, emergency calls and surveillance videos will all use an Ethernet network to send an receive all information.
The network architecture is based on a backbone consisting of 2Gbit/s high-speed Ethernet trunks.
Each node is configured for optimum transport of the information flows for the various functions.
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Westermo Lynx400 Ethernet switches with optical couplers cable of spanning over 40km enable local communication with the VMS, radio data transmission station and weather station.
The flows generated are channelled by VLAN sub-networks to avoid network overloads and ensure real-time interchange of all the necessary information.
The selection of Westermo industrial products with high MTBF and wide temperature, vibration and shock resistance ensures the high availability of this solution.
In addition to the industrial Ethernet switches, Westermo are also supplying LD-64 convertors specifically for the Millau multi-span cable-stayed viaduct.
The variable message signs (VMS) located just before and on the viaduct itself communicate over a serial communication protocol using a redundant optical fibre Ethernet link based on Westermo LD-64 convertors.
The Westermo LD-64 convertors are used to build a redundant ring network over fibre where connected equipment has either an RS-232 or RS-422/485 interfaces.
As the fibre is completely insensitive to external interference it is the perfect solution for applications in exposed locations such as the roadside and when there is a requirement for fault tolerant communication.
The LD-64 provides a high level of data security as fibre or fibre pair failure does not affect the communication.
There are also digital alarm outputs that can be connected to a relay to control an external alarm indicator.
LD-64 supports data rates of up to 375Kbit/s, which meet the requirements of the Millau project.
The device can also handle transmission ranges up to 25km using single-mode cable.
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