4
Terminator disabled (OFF, default) Terminator enabled (ON)
3.
Bias Resistors Enable/Disable:
Pin 5 to 8 of the DIP switch are to enable (ON) or disable (OFF) the 4 bias
resistors for TX+, TX-, RX+, RX- signals respectively. Please note that you have to
set them to OFF if you are setting the port in RS232 mode.
Disable (default) all 4 Bias resistors for TX+, TX-, RX+ and RX-: