Serial port pinout

In the AlphaCom E20 and E26 the two serial ports are available on RJ45 connectors. In the AlphaCom E7 serial port 0 is 9 pin DSUB, and serial poret 1 is RJ45.

The serial port 0 can be RS232 only, the serial port 1 can be RS232, RS422 or RS485.

The pinout on the RJ45 connector is as follows:

RJ45 pinout
RS232	3 = TX<br\>6 = RX<br\> 4&5 = GND
RS422	1 = RX-<br\>2 = RX+<br\>7 = TX-<br\>8 = TX+
RS485	1/7 = Data - <br\> 2/8 = Data+

<br\><br\> Cabling between RIO unit and AlphaCom E using multidrop RS485:

RJ45 - AlphaCom E	RIO 15 p DSUB
1 (RX-)	9 (TX+)
2 (RX+)	2 (TX-)
7 (TX+)	11 (RX+)
8 (TX+)	4 (RX-)