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USB to RS232, USB to RS422 or USB to RS485 serial converter - 4-port. The USB-401 is a self-contained unit, obtaining it's power from the USB port. Internal high-speed transient suppressors on each data line and 3kv isolation protect the US-401 from dangerous voltages levels or spikes. Supplied with virtual serial port software to mimic a traditional serial port for use with legacy software.
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