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1 Port
USB 2.0 Industrial Adapter User Selectable RS232/422/485 FTDI ChipModel #: USB-COMiPLUS
8 Port
RS232 PCI Combo Expansion Module BoxModel #: PCIMODBOX232
8 Port USB 2.0 to RS232, RS422, RS485 Auto Setup AdapterModel #: USBG-8COM-PRO