Simga2N Traction Advanced Manual– V1.3 Page 29 (166) ©2021 DMC GmbH Herten Germany
3.1.4 Wiring of the CAN bus
CAN bus communication wires should be terminated at both ends with a 120Ω resistor.
All Simga2Ncontrollers have a 120Ω termination resistor installed, it is up to the user to use it or not.
By linking pin A24 and A25 on a Simga2Ncontroller the termination resistor becomes active.
If a CAN bus network is installed in a machine, special care should be taken which two CAN nodes should have the build-
in termination resistor connected. Make sure that only 2 termination resistors are active.
Below 4 examples of a CAN bus network, with and without DMC CAN Display, with and without isolated CAN bus.
Non-isolated CAN bus wiring example with DMC Display:
The DMC Display and the DMC Colour Display have a CAN bus termination resistor installed. This resistor is fixed installed
and cannot be disconnected. The schematic below shows how the CAN bus termination should be wired when a DMC
Color Display is part of the CAN bus installation and the CAN lines are not isolated. The schematic also shows the optional
wiring of a 8-way female Molex Minifit connector which could be used to plug the DMC Calibrator. Mind that in this
case the DMC Calibrator can also be plugged into DMC Simga2NConnector B - Communications - 8 Way (Molex Minifit).
Non-isolated CAN bus wiring example without DMC Display:
The schematic below shows how the CAN bus termination should be wired when no DMC Display is part of the CAN bus
installation and the CAN lines are not isolated. The schematic also shows the optional wiring of a 8-way female Molex
Minifit connector which could be used to plug the DMC Calibrator. Mind that in this case (non Isolated Can) the DMC
Calibrator can also be plugged into DMC Simga2NConnector B - Communications - 8 Way (Molex Minifit).
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