StarTech.com 2 Port PCI RS422-485 Serial Adapter Card with 161050 UART Summit X460-24x - 16405 It also features a screw-locking

It also features a screw-locking host connection plus a screw-locking USB-B connector on the included USB cable

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StarTech.com 2 Port PCI RS422-485 Serial Adapter Card with 161050 UART Summit X460-24x - 16405 It also features a screw-lockingThe PCI2S4851050 2 Port PCI Serial Adapter Card (RS422 RS485) with 161050 UART adds two DB9 RS422 RS485 serial ports, using a single PCI expansion slot. The PCI serial card offers a high performance 16C1050 UART and supports both 2 wire and 4 wire RS485 modes. The card delivers an efficient single chip design and a large 256 byte transit receive FIFO buffer that work together to provide high speed serial communication while reducing the overall load