Otherwise, if two controllers are similar in power (for example a traction and a
pump motor controller) and a third module works with less current, the best way
to deal this configuration is to create a common ground point (star configuration)
U Correct Layout:
Note: Module 1 power
≈ Module 2 power > Module 3 power
In this case the power cables starting from the two similar controllers must be as
short as possible. Of course also the diameter of the cable concurs in the voltage
drops described before (higher diameter means lower impedance), so in this last
example the cable between the minus of the Battery and the common ground
point (pointed by the arrow in the image) must dimensioned taking into account
thermal and voltage drop problems.
Module
1
Module
2
Module
3
4 Can advantages
The complexity of today systems needs more and more data, signal and
information must flow from a node to another. CAN is the solution to different
problems that arise from this complexity
- simplified design (readily available, multi sourced components and tools)
- lower costs (less and smaller cables )
- improved reliability (fewer connections)
- analysis of problems improved (easy connection with a pc to read the data
flowing through the cable)
4.2.4 Wirings: I/O connections
- After crimping the cable, verify that all strands are entrapped in the wire
barrel.
- Verify that all the crimped contacts are completely inserted on the connector
cavities
U A cable connected to the wrong pin can lead to short circuits and failure;
so, before turning on the truck for the first time, verify with a multimeter the
continuity between the starting point and the end of a signal wire
- connector pin assignment see the paragraph
“description of the connectors”
for information about the mating
AEQZP0BA – COMBI AC1 - User Manual Page - 15/86
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