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This 3.6-meter USB to DB9 female RS232 serial cable adopts premium FTDI FT232RL chip to ensure excellent signal performance and strong compatibility. It features professional null modem crossover wiring (2RXD 3TXD), which realizes direct data transmission between serial devices without extra adapters. Strictly following RS232 standard, it delivers stable data transfer and anti-interference capability. The adequate 3.6m length meets the demands of long-distance wiring for industrial control, equipment debugging and system maintenance. Plug and play for easy installation, ideal for connecting PLC, industrial sensors, POS machines, serial instruments and other RS232 devices.