Kramer Electronics VP-43XL VP-43xl is a bi-directional format converter between RS-232, RS-485, and RS-422 protocols. Input data in any format is converted to the other two formats. Ports - RS-232, RS-485, and RS-422. Format Conversion - Any control message is converted to the other 2 formats at the same baud rate. RS-485 - Up to 32 units can be connected via RS-485. Baud Rates - 1200, 2400, 9600, 19200 and 38400. Compact Kramer TOOLS - 3 units can be rack mounted side-by-side in a 1U rack space with the optional RK-3T rack.