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 RJ45 pinout is as follows:

	AlphaCom E
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+

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RIO: Multidrop (RS485) cabling:

 AlphaCom               RIO #1                  RIO #n           
 Serial 1             15 pin DSUB             15 pin DSUB
  RJ45

   1 -----------------+-- 9 --+----------------+-- 9
                      |       |                |
                      --- 11---                --- 11

   7 -----------------+-- 2 --+----------------+-- 2
                      |       |                |
                      --- 4 ---                --- 4