The FX30E/FX60E has two serial ports (Figure 1). Each port has a Universal Asynchronous Receive Transmit (UART) capable of operating up to 115,200 baud. The left port is an RS-232 port that requires a DB-9 male plug connector. The right port is a non-isolated RS-485 port that uses two wires with a shield connection and a screw-terminal connector plug.
Note: A green receive LED and yellow transmit LED are provided for each serial port. These LEDs are located on the bottom board opposite of the serial connectors (Figure 7). The LEDs are labeled on the board (COM1, COM2) and are not visible with the cover on.