digiDL-B / BT - Installation
DigiDL-B / BT Installation Guide
Page - 6
Specific Vehicle Manufacturer Considerations:
Enhanced Tacho Cable - DDL-ETC (Recommended for all installations)
Please note that whilst we have a range of cable options we recommended the
DDL-ETC for all installations. In the case of vehicles with a conjoined A and B
plug at the rear of the Tachograph you must use DDL-ETC.
Vehicles with conjoined plug:
Mercedes and Volvo
Volvo / Mercedes Plug
Y Cable Secondary CAN-Bus adapter - DDL-CY (Legacy Product)
In some cases a RED plug may already be inserted in the C Connector of the
Tachograph for manufacturer or third party services. In most cases this can be
removed and terminated (see DDL-TM connector Page 7).
If information is required from the
Tachograph for a third party service
we provide a Y Connector which
allows you to plug both devices into
CAN C.
Some 2015 onwards vehicles (Scania
and Volvo to date), seem to have
systems which are tapping into data
from the CAN2 even though they are
not doing remote download.
Both devices cannot share the same CAN address and the truck manufacturers
do not provide a way to change their address. The Y cable is only used in
conjunction with the digiDL standard cable DDL-TC.
DigiDL-B / BT Installation Guide
Page - 7
Y Cable Secondary CAN-Bus adapter - DDL-CY (continued)
The standard CAN bus address for remote download is FB. However for all
Tachosys remote download devices programmed from Nov 2020, the CAN bus
addresses are set to FA as default. This prevents issues occurring where more
than one device is set to FB. For older devices , the CAN bus address should be
manually changed using the digiConnect software whilst connected to a digiDL
with a configuration cable.
For shared devices use DDL-CY and if the third party device is not required use
DDL-TM below.
N.B: we recommend the DDL-ETC where a Y Cable was once required as it
performs the same job. The Y cable has effectively been superseded.
Vehicles most affected:
Iveco, MAN, Mercedes, Scania and Volvo
CAN-Bus Termination plug DDL-TM for Onboard Systems 2012 onwards
Some manufacturers fit a telematics unit as standard
even if the operator does not subscribe to any services.
This telematics unit may use the Tachograph to
terminate their own CAN-Bus. If the Red Plug is
removed from the Tacho errors may occur which are
shown on the vehicle dashboard.
Remove the manufacturer’s or third party’s Red plug
and terminate it with our DDL-TM 120 Ohm resistor.
To check for an active third party device, check voltage between GROUND and
PIN 5 of their RED plug with the vehicle’s ignition ON. It will read +/- 3V if active.
Vehicles most affected:
Iveco, MAN, Mercedes, Scania and Volvo
N.B: we now recommend using the DDL-ETC in
all new installations as both DDL-CY and DDL-
TM have been superseded by it. The DDL-ETC
caters for all aspects of CAN-Bus termination
and the conjoining of sockets A and B as in the
case of Volvo and Mercedes. DDL-CY and DDL-
TM are still supported for legacy
implementations which use our original
standard cable DDL-TC which is still available.
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