Desktop PC PCI serial card - 4 COM ports. PCI to COM 9-pin RS232 expansion card.

4-Port Serial Expansion Card: Professional PCI add-on card adds four independent RS232 COM ports to desktop computers. Solves serial port shortage for legacy equipment, industrial devices, and specialized hardwareessential upgrade for systems requiring multiple simultaneous serial connections.

Standard 9-Pin DB9 Connectors: Features four full-function 9-pin (DB9) male RS232 ports with complete signal support including TX/RX, RTS/CTS, DTR/DSR. Universal connectivity for serial mice, modems, printers, barcode scanners, CNC machines, PLC controllers, and industrial automation equipment.

PCI Interface Compatibility: Standard PCI 2.2/2.3 compliant card fits all desktop motherboards with available PCI slots. Dedicated chipset provides independent COM port resources without IRQ conflictsreliable performance for multi-port serial communication requirements.

Plug-and-Play Driver Support: Automatic driver installation on Windows 10/11, Windows 7/8, Linux, and legacy operating systems. Recognized as standard COM ports (COM3, COM4, COM5, COM6)seamless integration with existing serial communication software and applications.

Industrial & Professional Applications: Ideal for point-of-sale systems, cash register connectivity, label printers, data acquisition equipment, satellite receivers, security systems, and manufacturing automation. Essential tool for IT professionals, system integrators, and industrial facilities maintaining legacy serial infrastructure.