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Industrial 4-Port RS-232 to USB 2.0 High Speed Converter with Locking – HardboxUSA
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Gearmo USB 8 Port Serial RS232 featuring FTDI Chipset with LED Indicators
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Rugged Industrial 8-Port Terminal Block RS232/422/485 to USB Adapter
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Gearmo USB 8 Port Serial RS232 featuring FTDI Chipset with LED Indicators
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4 Port Serial RS-232 Hub w/ FTDI Chipset & RX/TX LED Indicators
![CTF4XRS232USB (Automotive/Industry 4-port RS232 USB adapter, FT4232HL, 9-48VDC) [ USB-Hub ]](https://www.cartft.com/image_db/CTF4XRS232USB.jpg "CTF4XRS232USB (Automotive/Industry 4-port RS232 USB adapter, FT4232HL, 9-48VDC) [ USB-Hub ]")