This USB to RS232 converter is perfect for industrial engineers, system integrators, and automation professionals who need opto-isolated converter technology for secure serial communication. Our BLACK BOX SP385A-R3 delivers:
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Galvanic isolation providing electrical protection up to 2500V RMS for hazardous environment applications
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Opto-isolated converter eliminating ground loops and protecting connected equipment from electrical surges
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Industrial-grade noise immunity ensuring reliable data transmission in electrically noisy environments
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USB to serial adapter functionality supporting legacy RS-232 devices with modern computer systems
Key Features
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Serial interface isolation protecting both USB host and RS-232 device from electrical faults
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Industrial communication standards supporting harsh environment operation with extended temperature range
- Designed for noise protection applications in manufacturing, automation, and process control
- Consistent RS-232 compatibility supporting full handshaking and flow control
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Plug-and-play operation with automatic driver installation for Windows, Mac, and Linux systems
Technical Specifications
| Manufacturer |
BLACK BOX |
| Model Number |
SP385A-R3 |
| Type |
USB to RS232 Opto-Isolated Converter |
| Isolation Voltage |
2500V RMS galvanic isolation |
| USB Interface |
USB 2.0 Type-A connector |
| Serial Interface |
RS-232 DB9 male connector |
| Data Rates |
300 bps to 921.6 Kbps |
| Operating Temperature |
-40°C to +85°C (-40°F to +185°F) |
| Power |
USB bus-powered, no external adapter required |
| Protection |
ESD protection, surge protection, optical isolation |
| Compatible Systems |
Windows, Mac OS, Linux, industrial automation systems, SCADA |
Frequently Asked Questions
Q: How does optical isolation protect connected equipment?
A: The opto-isolated converter uses optical coupling to electrically separate the USB and RS-232 sides, preventing ground loops, voltage spikes, and electrical noise from damaging sensitive equipment while maintaining reliable data transmission.
Q: What industrial applications benefit from this isolation?
A: This isolated converter is essential for factory automation, process control, and SCADA systems where electrical noise, ground potential differences, and hazardous voltages require galvanic isolation for safe and reliable operation.
Q: Is this compatible with legacy RS-232 devices?
A: Yes, the USB to RS232 converter provides full RS-232 compatibility including DTR, DSR, RTS, CTS, DCD, and RI signals, ensuring seamless integration with industrial equipment, test instruments, and legacy serial devices.
Q: How does this improve system reliability in noisy environments?
A: The optical isolation eliminates common-mode noise, ground loops, and voltage transients that can cause communication errors or equipment damage, making it ideal for industrial environments with motors, welders, and high-power equipment.
BLACK BOX SP385A-R3 USB to RS232 opto-isolated converter with 2500V galvanic isolation for industrial serial communication and noise protection.
