CAN Interface

Connect the device interfaces to the CAN bus whose data you want to visualize.
For test purposes, connect the device to a PC using a communication gateway (e.g. PCAN-USB - CAN/USB Interface).
The CAN connection terminal CAN-High and CAN-Low signals must match the signals of the connector on the device. You can connect ground of the power supply connector with CAN1-GND or CAN3-GND because the CAN1 and CAN3 interface has no galvanic isolation.
The CAN2 interface is galvanically isolated from the rest of the circuit and must not be connected with supply-GND.

Note

CAN3 has a lower performance compared to CAN1/CAN2.

The following table provides an overview of some CAN baud rates in relation to the bus length:

CAN baudrate	Maximum bus length
1 Mbit/s	25 m
800 kbit/s	50 m
500 kbit/s	100 m
250 kbit/s	250 m
125 kbit/s	500 m
50 kbit/s	1000 m

CAN Bus Termination

In any bus system, signal reflections at the end of a wire or cable can cause interference which can in turn cause transmission errors.
To minimize the reflections, place a termination resistor at each end of transmission lines.
The terminating resistance between CAN-High and CAN-Low must match the characteristic impedance of the transmission lines.

In CAN bus networks, normally unshielded, twisted cable pairs are used for signal transmission.
The characteristic impedance of the transmission lines is around 120 Ohm. So, the termination resistor between CAN-High and CAN-Low must be rated 120 Ohm.