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.
Product Key Features
- USB to RS‑422/485 converter with opto‑isolation
- Provides galvanic protection against surges & ground loops
- Supports half- and full-duplex RS422/RS485 communication
- Powered directly via USB port (no external PSU required)
- Rugged compact metal housing
- Plug‑and‑play installation with drivers
- Trusted Black Box reliability
Reliability & Performance :
The Black Box SP390A-R3 delivers high reliability and secure data transmission even in demanding industrial conditions. Its optically isolated design ensures devices remain protected from damaging electrical conditions, while maintaining consistent throughput for mission-critical data communication.
Key Features :
- USB to RS‑422/485 isolated Converter
- Safe, reliable industrial communication
- Compact, rugged enclosure
- Powered directly via USB
- Backed by Black Box engineering
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