#39 - CAN communication in industrial testers

🔗 CAN communication in industrial testers

The CAN bus is an extremely robust and noise-tolerant communication protocol, but only if the basic physical constraints are respected.

At short distances and lower speeds (~500 kbaud), communication often works even with non-standard wiring; however, this is not an acceptable solution in industrial test equipment.

👉 When working with longer cabling (20–30 m) or in noisy environments (motors, high-current DC-DC converters), standard CAN wiring is essential.

Elements of optimal CAN wiring:
✔️ CAN High / CAN Low on a twisted pair
✔️ Reference ground
✔️ Shielded cable, grounded on one side
✔️ 120 Ω termination on both ends (not optional!)

It is important to clarify whether the DUT includes termination, if not, it must be provided with an external resistor close to the connector.

Have a question? Feel free to reach out! 😁 

Download 39_CANComm.pdf