Allen-Bradley 9300-USBS Remote Access USB to RS-232 Serial Adapter

The Allen-Bradley 9300-USBS Remote Access USB to RS-232 Serial Adapter is a dedicated USB-to-serial bridge that lets a computer communicate with legacy Allen-Bradley equipment over RS-232. Built for Rockwell Automation environments, this Rev 3.0 adapter provides a USB interface on the PC side and a true RS-232 serial port on the device side, so programming, diagnostics, and data exchange with older controllers remain possible when no native serial port exists. Driver support and installation steps are documented by Rockwell Automation, and the device commonly appears as a COM-port entry after the appropriate software is installed, enabling AB software and terminal tools to connect through the adapter. Typical applications include connecting a PC to AB PLCs and operator terminals such as MicroLogix, SLC 500, and PanelView devices for configuration, monitoring, and troubleshooting in equipment rooms or remote-access scenarios where USB can substitute for RS-232 console ports. The 9300-USBS is a compact, cable-style USB-to-serial adapter designed specifically for Allen-Bradley serial communications workflows, aligning with Rockwell’s 9300-series accessories and offering reliable compatibility with standard RS-232 signaling to support routine AB programming cables and serial device interfaces.