RS485 cable is a kind of cable specially used for RS485 communication interface, with specific technical parameters to meet the requirements of RS485 communication. The following are some common RS485 cable technical parameters:

1 Conductor material: The conductor of RS485 cable is usually made of copper material, because copper has good electrical conductivity and stability. Common conductor specifications are 24AWG, 26AWG, etc., indicating the cross-sectional area or diameter of the conductor.

2. Insulation material: Insulation layer is an important part of protecting conductors and preventing electrical failures. RS485 cables usually use insulating materials such as polyvinyl chloride (PVC) or polyethylene (PE), which have good insulation properties and wear resistance.

3. Shielding layer: In order to improve anti-interference ability, RS485 cable usually includes shielding layer. The shielding layer can be made of materials such as copper wire braid, aluminum foil or copper tape to effectively absorb and resist external electromagnetic interference.

4. Twisted wire structure: The wires in RS485 cables usually use twisted wire structure, that is, multiple wires are twisted together. This structure can reduce electromagnetic interference and signal attenuation, and improve transmission stability.

5. Transmission distance and rate: The transmission distance and rate of RS485 cable are the key technical parameters. The transmission distance depends on the quality of the cable and the communication rate, in general, the higher the transmission rate, the shorter the transmission distance. The RS485 standard specifies a transmission distance of about 1200 meters, but in practical applications, the transmission distance may be affected by factors such as cable quality, interface circuits and transmission rates.

6. Number of nodes: The RS485 bus standard supports multi-node communication, that is, a host can have multiple slaves. The number of nodes in a cable refers to the number of devices connected to the bus. In general, the number of nodes supported by the RS485 bus standard ranges from 32 to 256, depending on the driver and receiver chip used.

It should be noted that the above technical parameters are only some common introductions and do not apply to all types of RS485 cables. When selecting and using an RS485 cable, select the appropriate cable specifications and parameters according to the specific application requirements and environmental conditions, and consider various factors.

In addition, it is also necessary to pay attention to the quality of the cable, the reputation of the manufacturer and the certification in accordance with the relevant standards to ensure that the purchase of reliable and compliant RS485 cables.

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