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| Best Seller  | 4-Port Industrial USB to RS-232/422/485 Serial Adapter - 15 kV ESD Protection more | 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 | $39.74 $35.79 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 | 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 | $113.64 $102.12 go to store |
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