Why only 120 ohm is used in CAN?

The use of 120 ohm resistance in CAN (Controller Area Network) is not only a standard but also offers various advantages.

Firstly, it provides reliable communication between different electronic modules in a network. The 120 ohm resistance ensures that signal reflections and disruptions are minimized, which is crucial in high-speed data transmission. This helps to prevent information loss or data corruption in the network, resulting in more stable and efficient performance.

Secondly, the use of 120-ohm resistance also complies with national and international standards. Compliance with regulations ensures that different manufacturers' devices and equipment can communicate without any issues, even if they come from various sources.

Moreover, 120 ohms resistance also offers low power consumption, reducing the amount of energy needed to operate the network. It helps to make the design of CAN networks economical and efficient.