On the rear of all standard digital tachographs there are four 8-way connectors. These
are easily identified by their colours:
- Connector A is white and provides power to the tachograph. It is also used for
CAN1, the main control bus for the vehicle. For safety and good operation of the vehicle,
the Digidown T Chipset does not use CAN1.
- Connector B is yellow and connects to the speed sensor in the gear box. Digidown T Chipset
does not use this connector.
- Connector C is red and contains CAN2, the secondary vehicle control bus. This is
expressly provided for remote downloading and is isolated within the tachograph.
Activities on CAN2 cannot affect the operation of the vehicle. This is the primary
connection used by the Digidown T Chipset.
- Connector D is brown and provides some real time data that can be useful to collect.
We can provide you with a cable to connect to the red and brown slots on the back of the tachograph.
We can supply this cable with a connection to your telematics box, or open ended so you can fit your own.
If you discover other devices plugged into the red or brown connections, or some other
connection situation, please contact us
and we can provide you with appropriate cables.