User manual

AE9ZP0BD - DUALAC2/&HP/POWER - User Manual Page - 17/89
- The best cable for can connections is the twisted pair; if it is necessary to
increase the immunity of the system to disturbances, a good choice would
be to use a cable with a shield connected to the frame of the truck.
Sometimes it is sufficient a simple double wire cable or a duplex cable not
shielded.
- In a system like an industrial truck, where power cables carry hundreds of
Ampere, there are voltage drops due to the impedance of the cables, and
that could cause errors on the data transmitted through the can wires. In the
following figures there is an overview of wrong and right layouts of the cables
routing.
U Wrong Layout:
The red lines are can wires.
The black boxes are different modules, for example traction controller, pump
controller and display connected by canbus.
The black lines are the power cables.
This is apparently a good layout, but can bring to errors in the can line.
The best solution depends on the type of nodes (modules) connected in the
network.
If the modules are very different in terms of power, then the preferable
connection is the daisy chain.
Module
1
Module
3
Module
2
R
R
Can Bus
Power cables