The differences between them are as follows:
Different working principles CAN bus adopts ID-based packet transmission, that is, each data frame has a unique identifier ID, and the receiver judges the priority and content of the data frame according to the ID. The 485 bus uses an address-based approach, that is, each device has a unique address, and in the communication process, the address is used to determine the sending and receiving devices.
Different transmission rates CAN bus can achieve a higher transmission rate, generally between 500kbps to 1Mbps, and 485 bus transmission rate is generally between 10kbps to 10Mbps.
Different number of nodes CAN bus supports more nodes, generally can be connected to about 120 nodes, while the number of 485 bus nodes is limited by factors such as transmission rate and bus length, generally not more than 32.
The network distance of different CAN buses is relatively short, generally within 1000 meters, while the 485 bus can reach a longer distance, generally more than 1200 meters.
Different anti-interference ability CAN bus has strong anti-interference ability, suitable for harsh industrial environment, while 485 bus is relatively weak in anti-interference.
According to the introduction of electricians, the difference between can bus and 485 bus is mainly reflected in the following three aspects:
First of all, the number of can buses is 11.25% more than the 485 bus.
Secondly, in terms of sample volume, the can bus is 11.26% larger than the 485 bus.
3 Finally, in terms of sales price, can bus is 11.37% higher than 485 bus.