ISO 16844-1:2001

INTERNATIONAL ISO
STANDARD 16844-1
First edition
2001-09-01
Road vehicles — Tachograph systems —
Part 1:
Electrical connectors
Véhicules routiers — Systèmes tachygraphes —
Partie 1: Connecteurs électriques
Reference number
ISO 16844-1:2001(E)
©
ISO 2001

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ISO 16844-1:2001(E)
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ii © ISO 2001 – All rights reserved

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ISO 16844-1:2001(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 16844 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 16844-1 was prepared by Technical Committee ISO/TC 22, Road vehicles,
Subcommittee SC 3, Electrical and electronic equipment.
ISO 16844 consists of the following parts, under the general title Road vehicles — Tachograph systems:
� Part 1: Electrical connectors
Publication of the following parts is also planned:
� Part 2: Electrical interface
� Part 3: Motion sensor interface
� Part 4: CAN interface
� Part 5: Secured CAN interface
� Part 6: Diagnostics
� Part 7: Parameter definitions
© ISO 2001 – All rights reserved iii

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ISO 16844-1:2001(E)
Introduction
ISO 16844 supports and facilitates the communication between electronic units and a tachograph; the tachograph
[1] [2]
being based upon Council Regulations (EEC) No. 3820/85 and (EEC) No. 3821/85 and their amendment
[3]
Council Regulation (EEC) No. 2135/98 .
The purpose of this part of ISO 16844 is to ensure the compatibility of tachographs from various tachograph
manufacturers.
The basis of the digital tachograph concept is a recording unit (RU) that stores data related to the activities of the
drivers of a vehicle on which it is installed. When the RU is in normal operational status, the data stored in its
memory are made accessible to various entities such as drivers, authorities, workshops and transport companies in
a variety of ways: they may be displayed on a screen, printed by a printing device or downloaded to an external
device. Access to stored data is controlled by a smart card inserted in the tachograph.
In order to prevent manipulation of the tachograph system, the speed signal sender (motion sensor) is provided
with an encrypted data link.
A typical tachograph system is shown in Figure 1.
Key
1 Positive supply 3 Speed signal, real time
2 Battery minus 4 Data signal in/out
Figure 1 — Typical tachograph system
iv © ISO 2001 – All rights reserved

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INTERNATIONAL STANDARD ISO 16844-1:2001(E)
Road vehicles — Tachograph systems
Part 1:
Electrical connectors
1 Scope
This part of ISO 16844 gives the dimensions and tests and requirements for the performance of electrical
connectors needed for ensuring the interchangeability of different components of the tachograph systems used for
road vehicles in accordance with Council Regulation (EEC) No. 3821/85 on recording equipment in road transport.
In particular, this part of ISO 16844 specifies the connector used to connect the recording unit of the tachograph to
the vehicle electrical wiring harness.
2 Normative references
The following normative documents c
...