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What is a CAN bus node?

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What is a CAN bus node  ?


Devices on a CAN bus are called nodes   

 

Nodes cannot send data directly to each other

 

All nodes can send and receive data, but not at the same time. 

 

In many bus systems, over 70 electronic control units ECUs are at work. 

 

An ECU that performs its tasks in a CAN network is referred to as a CAN node.

 

Each node consists of a CPU, CAN controller, and a transceiver, which adapts the signal levels of both data sent and received by the node. 

 

CAN node refers to the unit that can be connected to the CAN bus, and can realize the communication between each node through the CAN bus, so as to realize the complicated control process. 

 

It is mainly used for the communication between many sensors of the car at present.

 

Nodes in the CAN bus: Nodes in the bus system include control units and bus auxiliary devices. 

 

The control unit consists of a controller, a transceiver, and two data transmission terminals. 

 

Compared with the controller ECU of the traditional automotive microcomputer control system, the control unit has more special bus interface devices,such as CAN bus interface in hardware, and has corresponding software, that is, the support of communication standards. 

 

Sensors and actuators in the traditional sense are called bus auxiliary devices, and one or more auxiliary devices on the same site are combined with a controller to form a bus module, also known as a node.

 

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