=== Configuration ===
'''Serial Ports Configuration'''
Each serial port can be individually configured to act in RS232
half/ full duplex or RS485 full duplex modes. The configuration is selected in fit-PC3 BIOS setup.
The default selection between RS232 and RS485/RS422 is determined by E1 jumper position. Default mode determines the power-up state of the Dual Protocol Transceiver. It is applied to all ports and remains valid in case that software configuration is not performed.
The options of jumper E1 selections are detailed in Table 4.