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| Best Seller  | StarTech.com 2-port PCI Express RS232 Serial Adapter Card PCIe RS232 Serial Host Controller Card PCIe to Serial DB9 COM Ports 16950 UART Low Profile Expansion Card Windows/macOS/Linux - Full/Low-Profile (PEX2S953LP) - serial adapter - PCIe - RS-232 x 2 more | FREE shipping go to store |
 | 4-Port Industrial USB to RS-232/422/485 Serial Adapter - 15 kV ESD Protection more | FREE shipping go to store |
| Best Seller  | Digi International EP-USB-4 4-4 RS-232 Serial DB-9 Digi Edgeport USB-to-Serial Converters & Adapter Digi Edgeport USB-to-serial converters offer instant I/O expansion for peripheral device connectivity. An out-of-the-box (external) alternative to PCI cards Edgeport makes it easy to add serial and USB ports to a PC server or thin client in minutes -... more | FREE shipping go to store |
 | StarTech 8-Port PCI Express RS232 Serial Adapter Card PEX8S1050 Add eight RS-232 DB9 serial ports to your desktop computer through a PCIe expansion card slots. This PCI express serial card with 8-port breakout cable provides you with multiple ports to connect a wide variety of serial peripherals at speeds of up to... more | $209.99 $186.99 FREE shipping go to store |
 | SYBA Multimedia 4-port Serial Adapter - PCI Express x1 - 4 x DB-9 RS-232 - Serial Via Cable - Plug-in Card - Retail more | $49.00 $37.79 FREE shipping go to store |
 | BlackBox Network Services IC1023A 8port Usb Hub Rs232 Perp Why install an internal serial adapter to get extra COM ports when using an external USB connection makes more sense? Our USB Hubs convert your serial devices to USB-adaptable peripherals without sacrificing serial connection speeds. The hubs feature... more | $582.68 $531.96 FREE shipping go to store |
 | Siig AC Quad Serial Port RS232 Pcie Card 256 Bytes Brown Box Black SIIG s Quad-Serial Port RS-232 PCIe Card is designed to provide four 9-pin RS-232 serial ports to your PCI Express-enabled desktop computer. This 4-port serial PCIe adapter card features 256-byte FIFO buffers to support fast data transferring to ensure... more | FREE shipping go to store |
 | Adds four RS-232 serial ports to PCI Express enabled computer systems. Replaces part # JJ-E40011-S4 Note: Replaces part # JJ-E40011-S4 Easily adds four RS232 DB9 serial ports through an available PCI Express slot PCI Express 1-lane (x1) adapter works... more | $113.43 $98.99 FREE shipping go to store |
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