Data Recording & Safety


Data Acquisition and Recording
Founded in 1887, HaslerRail has always produced speed indication and data recording systems – a fact underlined by the more than 40’000 mechanical and electronic systems in daily service all over the world today.
Since trains are more complex than ever, there is a barrage of information to gather which has either – in the case of signalling data (such as ETCS information) – to be handled instantly or has a more informative character and can be evaluated later on.
Data Recording is no longer only used for post incident / accident data analysis; it’s gone a step further and now supports safety management during daily operations as well as driver and fleet management.

Operation Module Data Recording


The Hasler®TELOC system covers the entire speed chain – from data acquisition by different sensors to the actual data recorder, acquisition of data from third party systems, speed indication, signal transmission and data evaluation. For different functions, SIL certifications up to levels 2 and 4 can be obtained.



According to current EU legislation, new or modified devices with safety relevant functions have to be designed according to the EN 50126 standard in order to receive a defined Safety Integrity Level (SIL) certification. Safety-relevant information is often already avail- able in the data recorder; therefore, it is sensible to use it to carry out safety-related functions such as roll protection, dead man function, Driver Safety Device (SIFA), speed threshold, etc. To assist our customers in the design of functions up to SIL4 level in new rolling stock or modernisation projects, HaslerRail has developed the Hasler®SABO Safety Board which also helps to simplify the certification process of an entire system.

ETCS Juridical Recording Units (JRU)
The requirements for ETCS Juridical Recording Units (JRU) are defined in TSI OPE and CCS. TSI OPE defines that data pertaining to the running of a train must be recorded and retained for the purposes of supporting systematic safety monitoring as a means of preventing incidents and accidents, identification of driver, train and infrastructure performance in the period leading up to and, if appropriate, immediately after an incident or accident, enabling the identification of causes, and supporting the case for new or changed measures to prevent recurrence and recording information relating to the performance of both the locomotive/traction unit and the person driving.


TELOC © 3000

04_datarecording-18TELOC® 3000 is part of a brand new smart-tech equipment generation that satisfies the most demanding requirements. Due to the open architecture of the system, new functions can be integrated at hardware and at software level. The housing can be customised
to the customer’s requirements and is based on 19 inch technology. The TELOC® 3000 generation has been developed for use on all railway vehicles such as electric and diesel locomotives, high speed trains, electric and diesel multiple units and mountain railways as well as light rail vehicles, trams and metro trains.

TELOC® 3000 is certified to be used as a JRU (Juridical Recording Unit) for ETCS on-board installations in combination with national data recording. Crash protected memories are available that comply with different standards. Furthermore,
it is possible to integrate safety functions up to SIL4 (EN50126). Available functions include vigilance control, dead man function, SIFA, rollback-protection, roll-protection, speed monitoring, brake curve supervision, etc.

Data Transfer & Data Evalutation

04_datarecording-12Data Transfer

TELOC® systems can be connected to mobile gateways (routers) to send data to an off-board server.
This makes data accessible to different interest groups.

Data Evaluation

Data recorders have often only been used for accident / incident investigation, i.e. data is recorded and viewed on rare occasions. Therefore, the analysis software tools used were focused on data visualization. Creating information with existing accident/incident analysis software tools is a recurring and manual activity which requires training and specific domain knowledge and hence is slow and error-prone. Data analysis has to be automated in order to look at data continuously and in

a uniform manner and to generate information out of recorded data. With this in mind, HaslerRail has developed its software tool Hasler® EVA+.

The Hasler® Pulse Generators

04_datarecording-22The design of HaslerRail’s optical pulse generator, Hasler® OPG, based on an optical system that operates in the infrared range, has been designed to resist the most extreme mechanical and thermal stress.

In recent years however, the increase of operational speeds and the optimization of network capacities have led to the fact that the existing standards no longer represent real-life conditions in the rail environment. Based on vibration data collected in the field, HaslerRail has designed a heavy duty pulse generator, Hasler® HDPG, around a new sensor technology in the form of a lightweight ASIC.

Pulse generators deliver signals to measure and record distance as well as speed, wheel slip and slide sensing, various control and safety functions, train safety system, etc. Due to its accuracy and reliability, Hasler® Pulse Generators are used for different signalling applications, e.g. ETCS and CBTC.

Voice and Video

04_datarecording-24HaslerRail developed a cab voice recording system for its TELOC® system a decade ago and it is in successful use on various trains. After an incident/accident it can be useful to hear and/or see what happened during the final minutes. With the new powerful TELOC® 3000 system it is also possible to record camera pictures. The camera(s) can either be installed inside the drivers’ cab in order to record the driver’s actions as well as his or her track view or it can be installed anywhere in the vehicle’s front (e.g. in a headlight) in order to see possible events below the driver’s natural line of sight. With the Hasler® EVA+ evaluation tool, it is possible to see time-synchronised pictures with other recorded data/events.04_datarecording-6

Additional Equipment

04_datarecording-16HaslerRail offers different peripheral equipment such as:

  • –  Pressure sensors
  • –  Different speed indicators, e.g. moving coil instruments, Hasler® SPEEDO(step motor controlled with pointer feedback), displays
  • –  RFID card reader to record driver number, access control, etc.
  • –  etc.HaslerRail also offers service unit software to support the customer
    in commissioning and fault finding. Test equipment including bench test equipment is available on customer demand.

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