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Environmental control system for Taiwan high speed railway

產業 交通運輸
相關產品 EDS-408A/405A系列
簡述 The Taiwan High Speed Railway (THSR) line covers a distance of about 345 km from Taipei to Kaohsiung. The train passes through many of Taiwan's major cities and regions, and will provide many benefits to a large percentage of Taiwan's citizens once it starts running at the end of 2006.
聯絡Moxa

項目簡介


The Taiwan High Speed Railway (THSR) line covers a distance of about 345 km from Taipei to Kaohsiung. The train passes through many of Taiwan's major cities and regions, and will provide many benefits to a large percentage of Taiwan's citizens once it starts running at the end of 2006.


Five sub-systems form the core of the Taiwan High Speed Railway—tracks, power substations, signal controls, the communication system, and the train system. Devices in different sub-systems are required to work properly under Taiwan's unique environmental conditions. Equipment used outdoors must be able to withstand high temperatures, humidity, and air pollution. Devices that are used indoors are often in areas without air conditioning. Another major concern is electromagnetic interference along the railway line. In general, equipment must be immune from EMI/EMC (this requirement also holds for non-high speed railways).


The design and maintenance of a high-speed railway system requires many high-tech products, including mechanical, electronic, material, and even control techniques. To ensure high security and quality service, stringent demands are placed on the design, the products used, and the monitoring schema.


System Description

The mission of a railway communication system is to support the trains, power distribution, signal control, environmental monitoring, maintenance, and passenger service. As a whole, the communication system is required not only to meet the basic needs of communication and administration, but also to satisfy the demands for safety monitoring, such as exception alarms, fire security, monitoring, and first aid.


The ECS (Environmental Control System) of Taiwan's High Speed Railway uses equipment from Siemens due to the high reputation that Siemens has earned for stability and reliability. However, the quality and reliability of the entire ECS can only be achieved if Siemens PLC devices are connected to secure reliable communication networks. In addition, for real-time communication, network devices must have access to high bandwidth connections. In order to build up a cost-effective communication network with high quality and reliability, the system integrates three different media:

  • Single mode fiber for long distance communication
  • Multi mode fiber for medium or short distance communication
  • Twisted pair copper to connect field PLC devices, sensors, and controllers


The system uses sixty ED6008-SS-SC industrial Ethernet switches to form an interference-free backbone network with optical fiber. The built-in Turbo Ring functionality makes it easy for system integrators to set up a redundant network using ring topology. The ED6008-SS-SC manged Ethernet switches are designed for industrial environments, and have an MTBF (Mean Time Between Failure) of 230000 hours to ensure that the system is secure, reliable, and high quality.


Network diagram for environmental control system


Overall Benefits:

  • Moxa Turbo Ring supports fast media redundancy with a recovery time under 300 ms, to provide customers with reliable and stable data transmission over the network.
  • The ED6008-SS-SC has an industrial design, and is certified by key international regulatory agencies.
  • The ED6008-SS-SC is comparably with high costperformance ratio to help users stay within budget.
  • Moxa provides fast technical support and a 5-year warranty.
  • The ED6008-SS-SC supports single mode fiber for long-haul communication.
  • The fan-less and low power design ensures an MTBF of up to 230000 hours.


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