Motec MDC User Manual download pdf (Page 17)

MoTeC MDC 15 Appendices

Appendix C – CAN Wiring Practices

The CAN bus should consist of a twisted pair trunk with 100R (0.25Watt) terminating resistors at each end of the

trunk.

The preferred cable for the trunk is 100R Data Cable but twisted 22# Tefzel is acceptable.

The maximum length of the bus is 16m (50ft) including the MoTeC CAN Cable (PC to CAN Bus Communications

Cable)

CAN Devices (such as MoTeC ADL, M800 etc) may be connected to the trunk with up to 500mm (20in) of twisted

wire.

The connector for the CAN Communications Cable may also be connected to the trunk with up to 500mm (20in) of

twisted wire and should be within 500mm of one end of the trunk. If desired two CAN Cable connectors may be

used so that the MoTeC CAN Cable may be connected to either side of the vehicle. Both connectors must be

within 500mm of each end of the trunk.

CAN

100R

CAN

Device

500mm

Max

CAN

CAN Cable

Connector

500mm

Max

<< CAN Bus >>

500mm Max

100R Terminating

Resistors at each

end of the CAN Bus

CAN

Device

CAN

Device

These wires must be Twisted

Minimum one twist per 50mm (2in)

Short CAN Bus

If the CAN Bus is less than 2m (7ft) long then a single termination resistor may be used. The resistor should be

placed at the opposite end of the CAN Bus to the CAN Cable connector.

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Motec MDC User Manual Page 17