Specifications

S E C U R I T Y T A R G E T D T C O 1 3 8 1 , R e l e a s e 1 . 3 v
Designed by Date Department Released by
Winfried Rogenz
Date
2007-11-14
Department
SV CV Div TCO LRH
Designation
Security Target DTCO 1381, Release 1.3
Document
40225345 SPE 000 AA
Version Pages
7 / 52
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5 Product rationale
5.1 Vehicle Unit description and method of use
The VU is intended to be installed in road transport vehicles. Its purpose is to record, store, display,
print and output data related to driver activities. It is connected to a motion sensor with which it ex-
changes vehicle’s motion data.
Users identify themselves to the VU using tachograph cards.
The VU records and stores user activities data in its data memory, it also records user activities data in
tachograph cards. The VU outputs data to display, printer and external devices.
The vehicle unit’s operational environment while installed in a vehicle is described in the following
figure:
VU
Card Interface
Card Interface
External
storage
media
Display
Motion
sensor
motion
data
Data
download
Other inputs / outputs
calibration
device
Calibration
External
storage
media
(Remote
data download)
user's inputs
Other
devices
downloading &
calibration
connector
Driver slot
Co-driver slot
printer
Figure 1 VU operational environment
The VU general characteristics, functions and mode of operations are described in Chapter II of Annex
1B. The VU functional requirements are specified in Chapter III of Annex IB.
The typical VU is described in the following figure. It must be noted that although the printer mecha-
nism is part of the TOE, the paper document once produced is not.