3: Installation and HardwareXPress DR+ User Guide 18Figure 3-2. Front Panel LayoutSerial InterfaceThe XPress-DR+ supports RS-232 via RJ45 connectors. It also supports RS-422/485 viascrew terminals (Serial Port 2 only).Note: Serial Port 2 supports RS232, RS422, and RS485, but only one mode at atime. This means you can use either the RJ45 connector or the terminal block,not both.The serial RJ45 serial connectors support RS232, up to 230400 bits per second.Table 3-1. RJ45 Serial Connector PinoutsPin Direction Name Function1 Output from DR+ RTS Ready To Send2 Output from DR+ DTR Data Terminal Ready3 Output from DR+ TXD Transmitted Data4 Ground GND Signal Ground5 Ground GND Signal Ground6 Input to DR+ RXD Received Data7 Input to DR+ DSR Data Carrier Detected8 Input to DR+ CTS Clear To SendFigure 3-3. RJ45 Connector – Front View
