210-068 is a PmodRS232 Converter Module Board (the RS232 module) translates voltage from the logic levels used by Digilent system boards to the RS232 voltage used for serial communications. The RS232 module creates a two way I/O exchange by converting RS232 voltage to logic level voltage and converting logic voltage to RS232 voltage. RS232 voltage levels are -3 to -12V for a logic 1, and +3 to +12 for a logic 0. The RS232 module is configured as a data communications equipment (DCE) device. It connects to data terminal equipment (DTE) devices, such as the serial port on a PC, using a straight through cable.