Black Box RS-422/RS-485 Opto-Isolator

Linking two devices powered by separate AC sources can create the potential for a ground-loop surge - a damaging electrical condition that can destroy your computer and wipe out data. But BLACK BOX Opto-Isolators interrupt that lethal pathway by completing the connection between the two devices with an internal fiber optic link. Data signals, converted to light pulses inside the Isolator, continue along on the circuit. But the fiber optic air gap stops ground loops from wreaking havoc with your hardware. With Opto-Isolators, it is easy to isolate your equipment from ground-loop potentials up to 2500 volts.

The RS-422/485 Opto-Isolator (SP401A) can protect RS-422/485 lines up to 2000 feet (609.6 m).