HESC-T-004 is a RS-232 serial port photoelectric isolator. It adopts advanced photoelectric isolation technology, and maximumly protects RS-232 serial interface devices from harsh environment damage, such as ground loop circuit voltage, surge, lightning, ESD, hot-plug and electromagnetic interference, etc. It converts the electrical signal to optic signal, then transmits the signal to another end, finally converts it back to electrical signal. This protects the communication device from ground loop circuit and surge interference, which greatly improve the reliability and stability of the communication system.

HESC-T-004 is widely applied in point-to-point RS-232 communication system which is used in the industry of power, insurance, telecommunications, railway, post office, finance, banking, securities and program control, and other systems such as UNIX multi-user system, surveillance monitoring system, satellite receiver system and ATM system.