Lisle Design - Solutions for transport


Digidown Details

With the arrival of digital tachographs according to EU Regulation 3821/85 Annex 1B, there is a requirement to download data from digital tachograph vehicle units (VUs).  In order to do this an appropriate piece of equipment must be connected to the download connector on the front of the VU, and then the data within the VU can be transferred (downloaded) to the download equipment.

The download equipment can be:

  • A laptop computer with appropriate software
  • A palmtop computer with appropriate software
  • A unit explicitly designed for the downloading of digital tachograph data - the Digidown from Lisle Design.

Digidown with writing Digidown with icons

The Lisle Design Digidown has three controls:

  • All VU - pressing this causes the Digidown to download all the data stored in the VU.
  • Latest VU - pressing this causes the Digidown to download only the latest data within the VU.
  • Card - pressing this causes the Digidown to download the data from the driver card (if any) inserted into the VU.

The control buttons can either have text or symbols on them, as shown above.

For fleet operators, 'Latest VU' typically downloads data recorded by the VU during the previous 2 to 3 months. For drivers' hours enforcement purposes, 'Latest VU' typically downloads data relating to the last 8 or 28 days. For accident analysis, 'Latest VU' perhaps downloads the detailed speed data.

During operation the three LEDs by the buttons indicate the progress of the download activities. The downloaded data is stored in the SD memory card inserted in the Digidown.

Digidown Image Labelled

After downloading, the downloaded data may be transferred to a permanent store and to any appropriate drivers' hours analysis software package.  The data transfer may be carried out by:

  • carrying or posting the SD card to the appropriate office and then reading the data from the card using an SD memory card reader.  A suitable memory card reader is available from Lisle Design.
  • connecting the Digidown to a vacant USB port on a suitable computer and then reading the downloaded files in just the same way that files might be read from other memory devices.  A suitable USB lead for this purpose is supplied with the Digidown.  When connected to a USB port in this way the Digidown appears to the computer as another mass storage device.

Files downloaded by the Digidown are in the precise format specified in EU regulation 3821/85 Annex 1B Appendix 7 and thus should be readable by any drivers' hours software package which is otherwise capable of handling data from digital tachographs.


  • Interface and storage matches requirements of EU Regulation 3821/85 Annex 1B.
  • Robust self-coloured case.
  • No batteries needed.
  • Downloads all or part of the contents of a vehicle unit (VU) including activities, events/faults and detailed speed.
  • Downloads driver cards via a VU. (Especially useful whilst away from home.)
  • Three buttons to select VU download type. Three LEDs to show status and progress.
  • Connects directly to PCs USB port for easy file transfer.

Digidown with button symbols


  • Easy to store, easy to carry, easy to use.
  • Low cost unit.
  • User choice of download options.
  • Memory card removable for storage, sending back to base or retention as evidence.
  • Works with all Drivers hours and Working Time Analysis Software.



80 x 40 x 20mm


Approx 60g

Cable Lengths

Integral download cable - 200mm.

USB upload cable - 2m

Memory Card Capacity

2GBytes ready-formatted memory card supplied as standard.


The Digidown illustrated in the images above carries the Lisle Design logo. However, the Digidown can also be supplied with colours and logos to suit your company image. The "Latest VU" download can also be altered to suit your needs.

Operations Manual

Digidown Videos

Digidown Configuration - Digidown File Name Format

What is downloaded when the 'Latest VU' button of a Digidown product is pressed is is configurable.

Each time a Digidown product saves a tachograph data file that file is given a name. The format of this name is not specified in any EU tachograph regulations. However the authorities in France and Spain have defined file name formats which must be used in those countries. Elsewhere there is no specific requirement for any particular name format but there are several commonly used name formats.

If you would like to change what is downloaded when 'Latest VU' is pressed or you would like to change the name format of saved files

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