Pin
Signal
1
A(-)
2
B(+)
3
GND
RS422/485 connector mapping
Pin
Signal
1
TXA(-) / A(-)
2
TXB(+) / B(+)
3
GND
4
RXA(-)
5
RXB(+)
System—Bottom (DIP switches)
Feature
1
RS422/RS485 port toggle switch
Toggle between RS422 or RS485 standard.
2
RS422/RS485 port resistor switch
Enable/disable the differential termination resistor.
3
RS422/RS485 port bias resistor switch
Enable/disable the bias resistor for the RS422/RS485 port.
4
ePSA diagnostic switch
When the position of the switch changes, the system starts in ePSA
(Enhanced Preboot System Assessment) mode on the next start.
5
RS485 port resistor switch
Enable/disable the differential termination resistor for RS485.
6
RS485 port bias resistor switch
Enable/disable the bias resistor for the RS485 port.
7
RS485 port resistor switch
Enable/disable the differential termination resistor for RS485.
8
RS485 port bias resistor switch
Enable/disable the bias resistor for the RS485 port.
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