Control System 48Service Manual – CS7000
CAN Bus Circuit
The main machine controller and the control panel are the two major players on the CAN Bus. The main
machine controller provides a “bias voltage” on the CAN bus wires that the messages ride on. It also has a
termination resistor inside it that connects the CAN Hi and CAN Lo circuits together. The control panel also
has a termination resistor. These termination resistors are important for normal circuit operation. If one of
them fails, communication will stop. The steering controller and the drive controller are both tied into the
CAN Bus circuits but do not contain termination resistors.
Main Machine Controller
Drive Controller
Steering Controller
Control Panel
Bias volts
CAN Hi Can Lo
Termination
Resistor
120 ohms
Termination
Resistor
120 ohms
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