Motec E816 User Manual download pdf (Page 21)

MoTeC Appendices 19

Appendix D: CAN Wiring – Multiple Device

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

usually OK.

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, BR2 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-LO

CAN-HI

100R

CAN-LO

CAN-HI

500mm

Max

CAN-LO

CAN-HI

CAN Cable

Connector

500mm

Max

<< CAN Bus >>

500mm Max

100R Terminating

Resistors at each

end of the CAN Bus

CAN-LO

CAN-HI

CAN-LO

CAN-HI

These wires must be Twisted

Minimum one twist per 50mm (2in)

CAN Device

eg M800

CAN Device

eg ADL

CAN Device

eg BR2

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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