Reasons why 485 to USB serial ports may be vulnerable to damage include:
Voltage and current problems: Voltage spikes, excessive or unstable currents can cause damage to chips and circuits.
Electrostatic discharge: Electrostatic discharge can cause circuit damage, so it is important to use anti-static equipment and anti-static measures.
Illegal operation: Incorrect operation, incorrect insertion, removal, or rough use may cause damage to interface components.
Low-quality products: Cheap or low-quality 485 to USB adapters may have problems in circuit design and material selection, and are prone to damage.
Electromagnetic interference: Electromagnetic interference may interfere with 485 communications and may affect the adapter if adequate electromagnetic interference protection measures are not in place.
To extend the service life of 485 to USB serial ports, it is important to use high-quality products, pay attention to proper operation, anti-static measures and electromagnetic interference protection.