4 Port Professional RS-232 USB 2.0 to Serial Adapter
USB to Serial adapter for the FLEX-6000 series – FlexRadio
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4 Port Professional RS-232 USB 2.0 to Serial Adapter
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HP USB to Serial Port Adapter - J7B60AA - Storage Mounts & Enclosures - CDW.com
USB to RS-232 DB9 1-Port Serial Interface Adapter - Sealevel
Mini USB to Serial Adapter Hi-Speed 920K FTDI Chip
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1505 - USB to fiber optic serial interface - Taylor Electronics
778473-04 - Ni - Serial Interface Device, USB-232/4, USB 2.0
USB to RS232 DB9/DB25 Serial Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
USB to Serial Adapter Cable
USB Interface Cable(s) | Onset's HOBO and InTemp Data Loggers
Keyspan RS232 to USB-A Adapter, DB9, 3-ft Cable | Eaton
Amazon.com: Plugable USB to Serial Adapter Compatible with Windows, Mac, Linux (RS-232/DB9 DTE Male Connector, Prolific PL2303HX Rev. D Chipset) : Electronics
USB to 4-Port RS-232 DB9 Serial Interface Adapter - Sealevel
StarTech.com USB to Serial Adapter - Prolific PL-2303 - 3 ft / 1m - DB9 (9-pin) - USB to RS232 Adapter Cable - USB Serial - Add an RS232 serial port to
C-USB-SERIAL: USB to RS-232 DB9M Serial Converter - iWorx Systems Inc
USB to 8-Port RS-232 DB9 Serial Interface Adapter - Sealevel
High-Speed USB-to-Serial Adapter for Windows 8 32/64-bit - U.S.Converters
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Dynex™ 16" USB PDA/Serial Adapter Cable Black DX-UBDB9 - Best Buy
