PCI-E 1X 2-Port Serial Expansion Card AX99100 Chip, Dual DB9 Male COM Ports Support RS232 RS485 RS422 with 12CM Standard Bracket

This PCI-E 1X serial riser card uses stable AX99100 control chip to expand dual independent DB9 male serial ports for computers lacking native COM interfaces. Users can flexibly switch RS232, RS485 or RS422 signal modes to match different industrial serial equipment.

It comes with a 12-centimeter standard metal mounting bracket, which can be firmly installed in full-size PC cases and industrial control cabinets. The internal anti-surge protection circuit effectively avoids signal distortion caused by voltage spikes and workshop electromagnetic noise, ensuring continuous stable serial data transmission.

Two serial channels run separately without mutual signal crosstalk, allowing simultaneous debugging of multiple PLCs, inverters, barcode scanners and laboratory testing instruments. Complete official drivers support mainstream Windows and Linux operating systems. Widely applied in industrial automation equipment, retail POS cash registers, monitoring hosts and equipment parameter debugging workstations.