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Blue USB adapter with two DB-9 serial ports and cable

USBGear

USBGear USBG-232FT-1 Dual Port DB-9 USB Serial Adapter

SKU CH-EM3Y-PK15M

Adds two RS-232 serial ports via USB with baud rates up to 921.6K bps and full modem control signals

  • Adapter typeUSB to DB9 (RS-232)
  • Product colorBlue
  • Adds two RS-232 ports via a single USB connection
  • Baud rates up to 921.6 Kbps for fast serial data transfer
  • Full modem control signals and hardware/software flow control supported
  • LED indicators show TxD and RxD activity for easy monitoring
  • Compatible with Windows 98 through Windows 8, Linux and Mac OS 10.X

Dual RS-232 Serial Adapter

The USBGear USBG-232FT-1 adds two DB-9 serial ports to a computer through a single USB connection. It supports standard RS-232 signals including TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI and GND. The adapter installs as standard COM ports and operates without IRQ or DMA conflicts. An external power adapter is included for reliable operation.

Industrial and Legacy Device Connectivity

This adapter suits users connecting industrial equipment, point-of-sale hardware or legacy instruments that require dual serial interfaces. It works with Windows 98 through Windows 8, Linux and Mac OS 10.x. Buyers needing more than two ports or a different physical connector should look at alternative expansion options.

921.6K bps Maximum Baud Rate

The serial ports deliver a maximum baud rate of 921.6K bps with support for non-standard rates. Full hardware and software flow control is provided alongside LED indicators for TxD and RxD activity monitoring. This speed rating determines whether the adapter meets the timing requirements of the attached serial devices.

How it compares

Measured against everything we stock in USB Adapter Cables & Dongles, at today’s prices. Recalculated every night.

Price $36.99
Pricier than about 90% of the 1,430 comparable items (median $14.99).

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Specifications

Product
Brand nameUSBGear
Model nameUSBG-232 ft-1
Product colorBlue
Adapter typeUSB to DB9 (RS-232)

Questions about this item

Will the FTDI chipset or the DB-9 connectors need replacement after heavy use?

The FTDI chipset is integrated and has no user-serviceable parts; the DB-9 connectors are rated for thousands of mating cycles and typically outlast the adapter itself.

What limits throughput when both ports run at 921.6K bps continuously?

The shared USB link and driver scheduling set the practical ceiling; each port can reach 921.6K bps, but combined sustained traffic is constrained by the single USB connection.

How much heat or noise does the adapter produce when powered all day?

It runs cool and silent with no fan; the external power adapter handles the load, so the unit itself stays near room temperature during continuous operation.

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