USB1784CP10 / 9399C28 AB PLC/5 Series USB Port Programming & Download Cable — Yellow A purposebuilt programming and download cable for connecting a PC USB port to AllenBradley PLC/5 Series controllers. This cable provides a direct, reliable link for programming, downloading code or firmware, and performing diagnostic or commissioning tasks with PLC/5 equipment. Key benefits Direct USB connection to AB PLC/5 Series controllers for programming and downloads, simplifying setup and reducing connection steps. Reliable data transfer for programming, firmware updates, and troubleshooting tasks, helping minimize downtime. Distinctive yellow color for easy identification in control cabinets and service kits. Key attributes Model: USB1784CP10 (also referenced as 9399C28 / USB 1784CP10). Functionality: Programming cable / download cable for use with PLC/5 Series controllers. Port type: USB (connects a PC USB port to the PLC/5 programming interface). Color: Yellow — improves visibility and identification in industrial environments. Use: Designed specifically for AB PLC/5 Series programming and download operations. Typical applications Plant commissioning: Connect a laptop to a PLC/5 controller to load control programs during system commissioning. Maintenance and troubleshooting: Download updated logic, retrieve program data, or run diagnostic sessions while servicing PLC/5 equipment. Firmware and configuration updates: Facilitate firmware or configuration downloads when updating PLC/5 devices during scheduled maintenance. Simple to use Connect the USB end to your PC and the other end to the PLC/5 programming port to begin programming or downloads. Intended for technicians and engineers working with AllenBradley PLC/5 Series hardware. Compatibility Specifically identified for use with AllenBradley PLC/5 Series controllers (models listed: USB1784CP10 / 9399C28 / USB 1784CP10). Verify controller and software compatibility before use. Packaging and identification Supplied in yellow cable color as indicated by the model designation for easy recognition in tool and spare parts inventories. Notes Intended for programming and download tasks with AB PLC/5 Series controllers. Confirm compatibility with your PLC/5 hardware and development tools prior to use.