Voltage level of CAN communication

Question:

Which voltage levels can be expected on the bus cables in case of communication via CAN?

Answer:

If communication is made via CAN bus (according to ISO 11898) the voltage levels of the CAN High / CAN Low signal refer to a reference voltage of 2.5 V. In High state the voltage level of the CAN high signal is raised by 1 V to 3.5 V and simultaneously the CAN Low signal is lowered by 1 V to 1.5 V. In Low state the voltage levels of the two signal cables are 2.5 V each (reference voltage). The indicated voltage values refer to the CAN ground potential. The figure below shows this.

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/200605636/1/

Meta data

Taxonomy: CANopen AIF EMF2175IB , CANopen AIF EMF2178IB , CANopen CMVCAN01 , CANopen E84DGFCC , CANopen E94ZACAN1 , CANopen ESVZAC0 , CANopen FIF E82ZAFD , CANopen FIF E82ZAFUC , CANopen MC-CAN2 , CANopen MXI E94AYCCA , CANopen S94CAN01A , CANopen , CAN AIF EMF2171IB , CAN AIF EMF2172IB , CAN AIF EMF2174IB , CAN FIF E82ZAFCC0 , CAN-IO FIF E82ZAFCC2 , CAN-IO-RS FIF E82ZAFCC1 , CAN system bus
AKB-ID: 200605636
Last update: 2024/01/11
Category: FAQ, Tips and Tricks

Lenze reserves the right to change information on this page at any time. Any liability for the accuracy of the information is excluded.