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Plugable USB to DB9 serial adapter with moulded end and short cable

Plugable Technologies

Plugable Technologies PL2303-DB9 USB to Serial Adapter

SKU CH-T55R-TV3N5 MPN PL2303-DB9

Adds a DB9 RS-232 serial port via USB with programmable baud rates from 75 to 128000 bits per second

  • Product typeUSB Wi-FI Adapter
  • Connects legacy DB-9 serial devices to modern USB computers
  • Adds a 9-pin RS-232 port replacing built-in or PCIe adapters
  • Programmable baud rate from 75 to 128000 bits per second
  • Prolific PL2303GT chipset supports Windows 11, 10, 8.1, 7, Vista, Mac, Linux
  • Powered by USB with no external power required

USB to Serial Adapter

The Plugable PL2303-DB9 adds a DB9 RS-232 serial port to any computer with a USB-A socket. It targets engineers, technicians and hobbyists who must talk to legacy industrial, networking or scientific equipment that still uses a nine-pin DTE male connector.

Check Before Ordering

Verify that the host machine runs Windows 11, 10, 8.1, 8, 7 or Vista, macOS or a current Linux kernel; ARM-based Windows devices such as Surface are explicitly unsupported. The target device must present a standard RS-232 DB9 interface and you may need a null-modem or straight-through cable depending on its wiring.

Build Integration

The adapter draws all power from the USB bus so no external supply is required. Its Prolific PL2303GT chipset creates a virtual COM port automatically, freeing a PCIe slot that a legacy serial card would otherwise occupy while supporting programmable baud rates from 75 to 128000 bits per second.

How it compares

Measured against everything we stock in Wi-Fi Cards & USB Adapters, at today’s prices. Recalculated every night.

Price $24.99
Pricier than about 63% of the 1,565 comparable items (median $18.99).

Specifications

Product
Brand namePlugable Technologies
Model namePL2303-DB9
Product typeUSB Wi-FI Adapter
Size & build
Shipping weight0.13 kg
Package size185 × 132 × 43 mm

Questions about this item

Does the package include a serial cable or do I need to buy one separately?

The adapter provides a DB9 male connector with retention screws; a NULL modem or straight-through serial cable must be purchased separately for most device connections.

Which operating systems are supported by the PL2303GT chipset?

Windows 11, 10, 8.1, 8, 7 and Vista are supported via Windows Update or downloaded drivers; macOS and Linux use embedded serial drivers, while ARM-based Windows is not compatible.

What baud-rate range can I expect when the adapter is installed in a computer?

The programmable baud rate spans from 75 bits per second up to 128000 bits per second, allowing use with a wide variety of legacy RS-232 equipment.

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