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Or, again, you can constantly enable the RS-422/485 driver by setting the W15 jumper to the B and C position. Data going from the RS-422/485 interface to the RS-232 interface: When the RS-232 interface is configured as DCE, data received on the RXA and RXB pins of the RS-422/485 port will be transmitted out Pin 3 (RD) of the RS-232 interface. When the RS-232 interface is configured as DTE, data received on RXA and RXB pins of the RS-422/485 interface will be sent out Pin 2 (TD) of the RS-232 int