Manufacturer-verified compatible cameras, recorders, mounts, accessories, and licenses for this product. Adjust quantities and add the entire bundle to your cart in one click.
Questions about this product? Free pre-sales support from a senior specialist — product questions, compatibility checks, BOM quotes, price confirmation — typically answered within one business day. Need camera placement or system design work? Engineering time is $175 per hour (qty 1 = 1 hour). Hardware buyers get up to one hour ($175) credited back on their order.
The Black Box SP390A-R3 is a USB to RS422/485 serial converter designed to bridge the gap between modern USB-equipped systems and legacy serial devices. This unit is essential for integrating older industrial equipment, point-of-sale systems, or specific surveillance hardware that relies on RS422 or RS485 communication protocols but lacks native USB interfaces. Its primary function is to provide a stable, reliable serial port connection over a standard USB 2.0 interface, simplifying deployments where hardware upgrades are not feasible.
This converter is compatible with any system featuring a USB 2.0 or higher port running Windows operating systems. It is designed to interface with devices requiring RS422 or RS485 serial communication. Specific applications include connecting older CCTV camera pan-tilt-zoom (PTZ) controllers, industrial automation sensors, or data acquisition modules that utilize these serial standards. It is not intended for use with RS232 devices.
Installation requires the driver software to be installed on the host computer before connecting the converter. Once drivers are active, the converter enumerates as a standard COM port, allowing configuration via device manager. Ensure the correct RS422 or RS485 termination and wiring configuration is applied to the serial device side to prevent signal reflection and ensure data integrity. The device draws power directly from the USB port, eliminating the need for an external power supply.
Manufacturer-verified compatible cameras, recorders, mounts, accessories, and licenses for this product. Adjust quantities and add the entire bundle to your cart in one click.
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