271 24 3USB-B CONNECTOR ONREAR OF MONITORTouch Screen Pin AssignmentSerial RS-232Pin No. Name Description1 DCD Data Carrier Detect2 RX Receive Data3 TX Transmit Data4 DTR Data Terminal Ready5 GND Ground6 DSR Data Set Ready7 RTS Request To Send8 CTS Clear To Send9 RI Ring IndicatorUSBPin No. Name Description1 VBUS +5V Power2 USB_D− USB Data −3 USB_D+ USB Data +4 GND GroundNote: The touch controller receives it power from the monitor’s internal power supply – not through theUSB connector.Baud Rate 9600Data Size 8 BitsStop Bits 1 BitParity No Parity (Only)Handshaking Hardware CTS/RTS