Manufacturer Product Type Startech Interface Hubs. Collection Model Startech 4 Port Serial Hub USB to RS232/RS485/RS422 Adapter - Industrial USB 2.0 to DB9 Serial Conv. FLEXIBLE POWER: This serial hub can be powered with either the 12V screw-locking power adapter or the 5V USB input while each serial port (pin 9) can be set to 5V 12V (power adapter required) or 0V_x000D_.
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