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Connections and cablings
NOTE : there is only one connection per interface (RS232 or RS422 or RS485)
RS232 connection
Standard PC connection
Sub-D 9 pins connector
Pin 2 :
Rx
Pin 3 :
Tx
Pin 5 :
GND
Isolated RS485 connection
2 wires connection
« dip-switch
» allows connecting the terminal resistor
Isolation via “opto-coupler”
2 polarization resistors could be removed easily (if needed).
Isolated RS422 connection
4 wires connection
« dip-switch
and
» allows connecting the terminal resistors
Isolation via “opto-coupler”
4 polarization resistors could be removed easily (if needed).
RECOMMENDATIONS
Before making any connection, please check the cabling. A wrong connection or cabling can damage
the serial link interface.
RTX-
RTX+
TX-
TX+
RX+
RX-
