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Axle sensor AZSB 300

For the realisation of safety information in direction to road traffic participants an absolutely safety detection of the train vehicle at the railway is necessary. By using BUES 2000 as modern and fully computer controlled level crossing system are the outsourcing of safety controlling tasks, directly located at field element, possible. By using of this possibility and based on the existing axle counter of interlocking system ZSB 2000 could be enlarged the using tarin detection variants with axle counter for BUES 2000 as well. The axle counters works on a self-intelligent base and communicates data telegram via CAN-Bus (Controller-Area-Network) with BUES 2000. The activation and deactivation is equipped in "Software" of BUES 2000 logic and will be not as separate hardware unit (axle counter computer) as BUES 2000 field element available. Based on the safety philosophy (US=Signal protected; FU=fully automatic controlled without any connection to train driver) axle counters are necessary in special by using of iron sleepers. Signal protected (US) level crossing systems are equipped for each activation point with one axle sensor. Systems with Fü safety characteristic are equipped with two axle sensors for activation point (redundant). The deactivation are realised with one axle sensor before and one after level crossing section. By leaving both deactivation points of level crossing section the opposite activation detection point will automatically observe and correct counting differences. Each axle sensor is evaluated by safety computer of ASA-Subassembly. ASA-Subassembly transfer telegram via element bus (EBUS) to safety main level of BUES 2000 with information about detected train axles number and direction of train. That means real activation and deactivation are carry out in the safety main level of BUES 2000. 

Scheidt &  Bachmann‘s axle counting sensor system (AZSB 300) for the activation and deactivation of level crossings always consists in hardware terms of a number of: 

  • axle counting sensors AS
  • axle sensor evaluation subassembly (ASA-BG)


  • axle counting sensor AS as double induction loop
  • impact-resistant and waterproof welded plastic housing 
  • universal mounting system for clamping to the rails. Rail connection housing with connection distributor board, junction plate, axle sensor evaluation subassembly and cable entry 
  • axle sensor evaluation ASA subassembly for activation and evaluation of the axle sensor signals and for communication with the control level of the BUES 2000 via the element bus (CAN)

Further characteristics:

  • small longitudinal extension in the track
  • maintenance-free system
  • universal fastening independent of the rail type
  • no new adjustment necessary after disassembling of the axle counting sensor (e.g. due to tamping work)
  • independent of the track superstructure and thereby independent of the sleeper
  • simple installation without drilling in the rails
  • continuous and intelligent evaluation through the axle sensor evaluation subassembly directly at the track with automatic recalibration
  • connection of a number of activation points via four wires (2 x power, 2 x CAN bus)
  • self-diagnosing system with automatic alarm message
  • connection of manual switching keys (UT) directly at the activation point possible

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