The CAN bus is a two-wire serial communication bus. The two wires are called CAN High and CAN Low. These two wires are twisted together to provide protection against electromagnetic interference (EMI) and to minimize signal distortion.
The CAN High wire carries the high voltage signals and the CAN Low wire carries the low voltage signals. The CAN bus wires are terminated at each end with a resistor to ensure that the signal is properly terminated and prevents signal reflections.
The wiring of the CAN bus is done in a daisy chain style, where all the devices or nodes are connected in series. Each node in the network is connected to the previous node and the next node in the chain. The first and the last nodes in the network are connected together forming a loop.
The CAN bus wiring can be divided into two main sections: the main bus and the stubs. The main bus is the main communication line between the nodes. The stubs are shorter wires that branch off the main bus to connect to different devices.
The CAN bus wiring is standardized and follows a specific color code for the wires. The CAN High wire is usually colored orange/white, and the CAN Low wire is usually colored white/orange. These colors are used to help identify the wires and ensure that the wiring is done correctly.
Overall, the wiring of the CAN bus is simple and reliable. It is designed to provide a high-speed and reliable communication system, and it is widely used in various applications around the world.
