Black Box SP390A-R3 USB to RS422 485 Media Converter with Opto-Isolation

Black Box SP390A-R3

USB to RS422/485 Media Converter with Opto-Isolation

The Black Box SP390A-R3 is a professional USB-to-RS422/485 media converter designed to provide reliable serial communication between USB-equipped systems and RS-422/RS-485 devices. Featuring built-in opto-isolation, it ensures safe data transmission by protecting connected equipment against surges, ground loops, and electrical noise.

As part of the Black Box connectivity portfolio, the SP390A-R3 combines durability and advanced protection in a compact form factor. It’s ideal for industrial, commercial, and lab environments requiring stable and secure communication between modern USB hosts and legacy serial equipment.

Features :

The SP390A-R3 converts USB input to RS422/RS485 outputs seamlessly, supporting both half- and full-duplex communication. Its opto-isolation design ensures galvanic isolation between the USB interface and serial line — improving safety and data integrity in electrically noisy environments.

Advanced Options :

This Converteris powered through the USB port, requiring no external adapters. Automatic sensing for RS‑422/485 communication and easily installed drivers provide plug‑and‑play functionality. Rugged enclosure and stable construction meet the needs of factory automation, SCADA, point-of-sale, and test bench environments.