×

Sale ends todayGet 30% off any course (excluding packages)

Ends in --- --- ---

Terminations resistances

CANBus Communications Decoded

Forum Posts

Courses

Blog

Tech Articles

Discussion and questions related to the course CAN Bus Communications Decoded

= Resolved threads

Author
790 Views

About the use of resistors, I would like to know which kind of problems we can cause on adding an additional 120 ohms resistance on the bus?

If this resistence is introduced on the "main line" or on the nodes?

Some CAN devices can't drive the current required if the total resistance is too low (ie, you add to many terminating resistors). I had a customer yesterday with the problem adding an Aim SmartyCam with built-in CAN termination to a Lamborghini Super Trefeo race car. The proper location of the termination resistor is one 100 - 120 ohm resistor at each end of the CAN bus. Often a simple 2-node bus will operate with only a single resistor on the bus.

The symptom is messages that aren't received, or devices that see too many errors so they stop transmitting.

We usually reply within 12hrs (often sooner)

Need Help?

Need help choosing a course?

Experiencing website difficulties?

Or need to contact us for any other reason?