ATC-108N optical isolation interface converter, compatible with RS-232C, RS-422, RS-485 standards, can convert single-ended RS-232 signals to balanced differential RS-422 or RS-485 signals, built-in optical isolators, can provide 3500V isolation voltage, two fast transient voltage suppressors (TVS) can effectively suppress lightning (Lightning) and ESD, provide 1000W per line lightning surge protection, can effectively prevent lightning and common grounding interference.