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The Az S 350 U (U = universal) microcomputer axle counting system is a fail-safe track vacancy detection device for one or more track sections. The system has been designed for use on main-line and industrial railways, regional lines, and light-rail transit systems. The microcomputer analyzes the information transmitted by the sensor which detects the number of wheels passing on a track section.

The system boasts low acquisition costs, a space-saving design, and the option of expanding its functionalities. In addition, a relay interface enables it to be connected to any interlocking.

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The Clearguard ACM 100 axle counting system is a smart track vacancy detection system for cost-effective operations. It is made up of maintenance-free Clearguard ACM 100 modules, which are programmed via an ID plug and combined with an Ethernet bus and low-cost WSD wheel detectors into a fail-safe axle counting system. This modular, compact system can be connected to both relay and electronic interlockings and complies with the latest compatibility requirements.
 
 

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The Az S M, a microcomputer-based axle counting system from Siemens, is a signaling and safety system for multiple track vacancy detection sections. Two Az S M system variants are available: Az S M (R) and Az S M (E).

The Az S M (R) system has a system-neutral, parallel-relay interface. This enables the transmission of up to 17 output data items (fail-safe outputs) to relay interlockings from any manufacturer. The Az S M (E) is connected to type SIMIS C and SIMIS W electronic interlockings via a bus interface. A further variant is the Az S M (PB) axle counting system, which features a PROFIBUS interface.

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FTG S remote-fed audio-frequency track circuits are used for the precision clear or occupied indication of track sections. The track section is remote-fed with a frequency-modulated voltage. Transmitter and receiver can be accommodated centrally in the interlocking up to 6.5 km from the track section.

FTG S is used on main-line railways as well as on metro, rapid transit, and suburban railways. Apart from track vacancy detection, there are other potential applications for the FTG S track circuit, for example:

The ZP D 43 electronic wheel detector, a further development of the proven ZP 43, is a wheel detection component in a track vacancy detection device that operates on the axle-counting principle. It consists of a DEK 43 double sensor complete with connecting cable and a trackside connection box.

The ZP D 43 is used as a component of axle-counting systems Az S 350 U, Az S M and Az S (M) 350 on mass transit, main-line, and industrial railways.

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The WSR (Wheel Sensor Relay) and WSS (Wheel Sensor Single) wheel sensors are electronic switches that respond contactlessly to wheel flanges.

The WSR sensor replaces mechanically or magnetically operating track-installed switching devices with rated operating voltages from 18 V to 60 V DC or 24 V to 60 V AC – such as S44, MK, and WSSB pulse generators – without need for modifications to cabling or existing analysis equipment. The WSS wheel sensor replaces the RSE sensor without any modification to the cabling or existing evaluation equipment.

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The WSD E (Wheel Sensor Double Electronical) double sensor is an electronic switch featuring contactless response to wheel flanges.

The wheel sensor consists of two electronic proximity initiators offset in the direction of travel. The WSD E is suitable for all switching, indication, and counting functions requiring a directional criterion.

It is compatible with the NAMUR interface (which is applied mainly in the shunting and industrial railway sector).

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The permanent location and identification of vehicles is the foundation for effective handling of the vehicle fleet in railway operations. The Sofis identification and locating system provides optimum support for laying this foundation.

Sofis, the Siemens surface acoustic wave identification system, exploits the properties of surface acoustic waves. The system is used for contactless identification of ID tags located on mobile or stationary objects. The scope of application of this system ranges from object identification through automatic control tasks to vehicle location.