The Conceptronic SRC01G is a PCIe expansion card designed to integrate RS-232 serial interfaces into desktop computer systems. This card utilizes the PCI Express 1.1 standard for a reliable connection to the motherboard, offers transmission rates of up to 2.5 Gbit/s, and is suitable for both professional and industrial applications with RS-232 interfaces. The successor model of serial interface cards enables the connection of older industrial equipment, scientific devices, network components, or cash register systems with serial ports. The PCIe form factor ensures compatibility with modern cases and motherboards that lack integrated serial interfaces. Installation is done via an available PCI Express slot, with no external power supply required. The robust design with a green circuit board and manufacturing in China ensures stable operation in data-intensive tasks within continuous operating environments. This expansion solution provides IT professionals, laboratory technicians, automation specialists, and users with a practical way to maintain connectivity with RS-232 devices while using current computer hardware. The card delivers consistent serial communication performance for reliable data transmission in PCIe form.