Motec Systems C185 - CAN Bus Wiring Requirements

MoTeC Appendices 59
CAN Bus Wiring Requirements
• The CAN bus should consist of a twisted pair trunk with 100R (0.25 watt)
terminating resistors at each end.
o If the CAN bus is less than 2 meter (7 ft) long, a single termination
resistor may be used.
• The preferred cable for the trunk is 100R data cable.
• The maximum length of the bus is 16 meter (50 ft)
• CAN devices (such as MoTeC Dash Loggers, ECUs etc) may be
connected to the trunk with up to 500 mm (20 in) of twisted wire.
CAN-LO
CAN-HI
100R
100
R
CAN-LO CAN-HI
CAN
Device
500 mm
max
<< CAN Bus >>
500 mm max
100R Terminating
Resistors at each
end of the CAN Bus
CAN-LO CAN-HI
CAN
Device
CAN-LO CAN-HI
CAN
Device
These wires must be twisted
Minimum one twist per 50 mm (2 in)