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The VSCOM USB-COMi+2 is one Port RS-422/485 USB-to-Serial Adapter, with Easy Mode Setting by Hidden DIP Switch Adds one RS-422 or RS-485 serial port by connecting to a USB port One DB9 male connector. There is no need to open chassis to set operation modes as upper case can be sliding open for easy RS-422, RS-485 mode.
The unit supports: RS-422 : RS-485 4-wire and RS-485 2-wire: As well units is equipped with automatic transmit and receive control for 2-wire RS-485 half-duplex mode and built-in termination and biasing.