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Used in the interlocking system ZSB 2000 are LED signal transducers. Actuation of the signals is brought via a safe electronic subassembly, namely the LSS-BG (Light-Signal-Control Subassembly), which is installed at each main signal location. This subassembly is connected to the safe interlocking level on the EBUS (element bus executed as CAN-bus) and gets transmitted the data for the signal aspects (images) to be displayed. For this the LSS-BG communicates via the SCAN (SignalCAN bus) with the safe processors of the individual LED light points of the main and advance signals and — in so far as these are present — with the auxiliary signals and speed displays at the location of the specific signal. Here the individual light points are brought together in a logical signal group and actuated via the SCAN bus per telegram. Thus each optical device possesses its “own intelligence” for the actuation and monitoring of the particular light point. In the case of an interruption in the link to the relevant interlocking level, an appropriate relapse management system in the LSS subassembly is processed.

Axle counting is an integral component of the ZSB 2000 logic. Axle counting is not formed as a separate functional unit but as software. Accordingly the sensor system needed for capturing the axles only provides the information “axle and direction” to the ZSB 2000 interlocking level. The evaluation of the “axle” information is carried out safely in the interlocking level with the formation of appropriate sections. The transmission of the information between sensor and interlocking is carried out with the aid of EBUS, executed as CAN-Bus (Controller Area Network Bus).

In the interlocking system ZSB 2000 additional display and operating devices are provided and used for particular operating situations or for variances from normal operations.

For operating at local level, so-called local operation user interface equipment (ÖBE) can be used. Here a HST subassembly (Key switch for local operation) is used, this being also connected to the EBUS (Element Bus as CAN Bus). The use of key buttons and operating on the dispatching and diagnostic system are also possible.

Each interlocking system ZSB 2000 has a station computer for dispatching and diagnostic tasks. The station computer is linked with the safe system on the one hand in a reaction free manner and on the other hand via a dispatching interface (DISPO). For diagnosis the CAN telegrams that have been sent on the system bus can be read and displayed with the aid of an analysis program.