MITSUBISHI EVO 4-8 PLUGIN ECU USER MANUAL
WWW.EMTRON.WORLD
© EMTRON AUSTRALIA PTY LTD MAY 2018
6
The following points should be noted when using the CAN Bus:
▪
CAN Bus High and Low are differential signals, so twisted pair
MUST
be used. Failing to
do so will compromise the entire CAN Bus System. It is recommended to twist the CAN
wire pairs at a minimum one twist per 40mm of cable.
▪
In some extreme environments, shielded twisted pair may be required to help with
reliability and data integrity.
▪
The less connectors in any transmission system the better. Unnecessary connectors are
almost guaranteed to present an impedance discontinuity and hence may cause
reflections and data loss.
▪
CAN Bus termination must be done correctly by using a 120 ohm 0.25W resistor at each
END of the bus system. See the example in Figure 3.1.
▪
Maximum Stub length to a device from the main Bus is recommended at 0.3m, in
accordance with High-Speed ISO 11898 Standard specification. See Figure 3.2.
ALL Emtron CAN devices do
not
include an on-board CAN termination resistor, allowing the
device to be wired at any position on the Bus. CAN Bus termination must be done correctly
by using a 120 ohm 0.25W resistor at each end of the bus system as mentioned above.
Figure 3.1. CAN Bus Wiring Example. ECU and ELC1 at each end with 120 Ohm Termination
Figure 3.2. CAN Bus Wiring Example. Stub Length less than 0.3m
