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| Alister – Electronic Interlocking System for Small and Medium-Sized Stations |
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Switching to Cost-Effectiveness
Alister, the electronic interlocking system developed by FunkwerkInformation Technologies, is a unique and cost-effective solution using modular system architecture based on standard components and adapted system functionality. It replaces obsolete technologies which were based on manufacturer-specific platforms and entailed high life-cycle costs.
Alister has been designed specifically for small and medium-sized stations. Here the volume of transport is much lower and the stations are smaller and less complex than those in the core of the network. Alister meets all the main specifications of rail network operators – low investment and operational costs, specifically adapted control and safety technology and long-term availability of spare parts.
The Innovative System for Small and Medium-Sized Stations
The electronic interlocking system Alister has all the features required by railway operators today - safety, a high degree of automation and remote control and networking functions. The system constitutes an innovation as it predominantly works with standard components of proven industrial performance and reliability. This not only leads to considerable cost savings, but also increases future-compliance. The first system was developed for the Swedish infrastructure operator Banverket.
The Advantages of Alister
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Modern system architecture with the highest safety level and high availability of the entire system |
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Tool-supported development process with verifiable requirement management |
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Use of modular hard- and software components from numerous areas of industrial automation (e.g. power and chemical plant control) |
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Simple engineering |
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Ease of maintenance plus convenient diagnostics system |
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Simple connection to existing interlocking systems |
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Low investment and maintenance costs |
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Low-cost spare parts inventory |
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Simple to upgrade |
Future-Compliance Thanks to Industrial Standards
Thanks to the use of industrial standards, Alister works with open interfaces. Connections to external systems such as an existing control centre or neighbouring interlockings are therefore problem-free and future hard- or software upgrades affect only individual parts, but not the system as a whole. Alister is one of the few interlocking systems in the world which has been implemented according to formal specifications.
On The Way to Approval throughout Europe
As safety takes pride of place in all types of stations, the interlocking system was designed and developed in full compliance with CENELEC, meeting Safety Integrity Level SIL 4 in accordance with CENELEC EN 50126/50128/50129. The stringent application of European standards has paved the way for cross-acceptance of the safety approval for the system by other rail authorities.
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The platform (generic product) has now also been approved in Denmark in the wake of the Swedish authorities having granted approval for the system. |
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Provisional approval was granted for applications in the Hungarian state railway MÁV in April 2004. |
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In the Netherlands Alister ensures safe operation of the "IJ-Tram" in Amsterdam. |
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The control and safety technology of the Corsican railway network is currently being renewed with Alister. |
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The Eisenbahn-Bundesamt (EBA) in Germany has also approved the safety and system concept of Alister. The next step is type approval. |
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