In some applications, the RS-485 bus might be exposed to high voltage, due to various reasons like direct shorts to power supplies, mis-wiring faults, connector failures, damaged cables, and tool mis-applications. The ±70-V fault-protection of THVD24x0 means that bus interface pins are protected against up to ±70-V DC overvoltage conditions mentioned above. For example, the A and B pins are accidentally shorted to 48-V power supply in an industrial automation equipment. THVD24x0 devices will not be damaged in this fault condition. As the communication fails, the fault condition can be detected and cleared. After the 48-V DC short is resolved, the devices resume working normally without requiring a power cycle.