The HD67119 interface converter is a cost-effective device for transferring serial data via USB. USB/RS485 Opto is designed to make serial port expansion quick and easy. Connected to a USB port on a computer or USB hub, this device instantly provides your system with additional serial communication ports. When you plug the device into the USB port, it is automatically recognized and installed. There are no IRQ and COM port conflicts as the port does not require additional IRQ, DMA or memory on the system. This USB/RS485 Opto provides instant networking for 485 communication devices for factory automation, multi-drop data acquisition devices, barcode readers, time clocks, scales, data entry devices, PC to PC communication over long distances.