... count and to adapt serial devices to your USB PC. Edgeport USB-to-Serial converters are intelligent expansion units that ... operating systems. No IRQ, I/O address, DMA or memory address requirements. Serial port models require no external power. ... rate300-115200bps, automatic sense signal rateTransmission RS232 side 15M, USB side less than 5MProtection600W sugre protection, 15KV static electricity ...