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

The Black Box SP390A-R3 USB to RS422/485 Converter with Opto-Isolation provides a reliable solution for connecting legacy serial devices to modern computers. This compact transceiver easily links older serial equipment to your PC's USB port, supporting both 2-wire RS-485 and 4-wire RS-422/RS-485 operation for versatile industrial and commercial applications. Its high-retention USB connector ensures a secure connection, while LEDs indicate data transmission activity for easy monitoring. The converter is compatible with USB 1.0, 1.1, and 2.0 interfaces, offering data transfer rates up to 12 Mbps without requiring external power, thanks to its powered interface design. The included serial terminal block can be removed for simplified wiring, making installation straightforward.

Safety and equipment protection are paramount, which is why this device features 2000-volt optical isolation. This isolates your PC and connected devices from voltage spikes and surges on the RS-422/485 network, safeguarding sensitive electronics and ensuring system stability. Configuring the converter is simple; just plug it into your PC’s USB port using the provided 3-foot cable and set the DIP switches for your desired operation mode. Once connected, the device appears as a COM port in Windows Device Manager, allowing seamless integration with existing applications.

Designed for environments prone to electrical disturbances, the Black Box SP390A-R3 enhances system reliability and safety. It supports multidrop networks with extended range capabilities, enabling multiple devices to communicate over a single connection. Additionally, it complies with environmental standards including WEEE and is TAA compliant, ensuring eco-friendly manufacturing practices. Built in the United States, this converter comes with a five-year limited warranty, offering peace of mind for long-term use. Whether used in industrial automation, commercial settings, or other critical applications, the Black Box USB to RS422/485 Converter with Opto-Isolation provides a robust, secure, and easy-to-use interface for legacy serial device integration.

Features:

• Supports both 2-wire RS-485 and 4-wire RS-422/RS-485 operation for versatile connectivity

• Offers 2000-volt optical isolation to protect against voltage spikes and surges

• High-retention USB connector ensures a secure connection

• Compatible with USB 1.0, 1.1, and 2.0 interfaces with data transfer rates up to 12 Mbps

• Powered interface requires no external power supply

• Removable serial terminal block simplifies wiring and installation

• LED indicators display data transmission activity for easy troubleshooting

• Includes 3-foot USB cable for quick setup

• Supports multidrop network configurations for extended range

• Built in the USA with environmentally friendly standards and a 5-year limited warranty