Product name: PCIE (x1) RS232 card (4port) Main control chip: AX99100 Product model: TXB174 Slot type: desktop PCIe x1 slot; compatible with PCIe x4 x8 x16 slots Benefits and key features Adds four RS232 serial ports to a desktop PC, enabling connection to multiple legacy devices at once. Compact PCIe x1 form factor fits standard desktop motherboards and expands capabilities without occupying extra space. Uses the AX99100 main control chip to manage RS232 signaling and communication. Product model TXB174 ensures a defined specification and compatibility path for serial interfaces. Technical details Function: PCIE (x1) RS232 expansion card with 4port serial interfaces Compatibility: Desktop PCs with PCIe slots; compatible with PCIe x4, x8, and x16 slots Form factor: PCIe expansion card designed for desktop systems Ports: 4 RS232 serial ports Use scenarios Industrial automation and control: connect PLCs, sensors, and other RS232 devices for monitoring and control from a single PC. Data acquisition and testing: gather data from multiple serial instruments and test equipment in laboratories or manufacturing environments. Pointof and peripheral integration: interface receipt printers, cash drawers, and other legacy peripherals that rely on RS232 communication. Notes The description adheres to the original product brand, specifications, models, and functions without adding details.