USB to Sub-D 9 Pin Serial Adapter Cable Premium InLine 33304D

The InLine USB to Sub-D 9 Pin Serial Adapter Cable Premium (MPN 33304D) is a 0.2 m cable with a USB Type-A connector that converts a USB port to a DB‑9 (Sub‑D 9) serial interface. It uses the PL-2303 chipset and enables connection of legacy serial devices to modern computers. Drivers are available for download from the manufacturer websites.

Advantages

This premium adapter cable provides a compact 0.2 m length for tidy connections, a standard USB Type-A plug for wide compatibility, and a blue jacket for easy identification. The PL-2303 chipset ensures broad driver support for many operating systems when the appropriate drivers from the vendor are installed.

Suitable for

• Connecting legacy serial devices (RS‑232) to modern PCs
• Programming or configuring network equipment, routers, or switches with serial console ports
• Point-of-sale terminals, industrial controllers, and measurement instruments that use DB‑9 serial ports

Key specifications

• Manufacturer: InLine
• Model / MPN: 33304D
• EAN: 4043718111091
• Length: 0.2 m
• Connector 1: USB Type‑A
• Connector 2: DB‑9 (Sub‑D 9)
• Chipset: PL‑2303
• Colour: Blue

How to use

Install the appropriate PL‑2303 drivers for your operating system by downloading them from www.intos.de or www.inline-info.com. After installing the drivers, plug the USB Type‑A connector into an available USB port on your computer and connect the DB‑9 end to the serial device. The operating system should detect the adapter and assign a COM port; use that COM port in your terminal or communication software.

Recommendations

To avoid connection issues, install the vendor-recommended drivers before connecting the cable and secure the DB‑9 connector if the device has thumbscrews or mounting points. Avoid using the adapter in environments with excessive mechanical strain or moisture.