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PCI Cards to add serial or USB ports to an existing system through the PCI Slot of the motherboard.
2 Port PCI 422/485 w/ Isolation & Surge Suppression
2 Port PCI RS422/485
PCIe to PCIx4 Expansion Board Component Kit
2 Port PCI RS422/485 w/ Breakout Cable
Not in stock - Backorder allowed
2 Port PCI RS422/485 with Surge Suppression & Isolation