Difference between revisions of "Serial port pinout"
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Revision as of 10:09, 3 March 2008
The AlphaCom E exchanges has two serial ports. In AlphaCom E20 and E26 they are available on RJ45 connectors. In AlphaCom E7 the serial port 0 is on a 9 pin DSUB connector, and the serial port 1 is on a RJ45 connector.
The serial port 0 is RS232 only, the serial port 1 can be RS232, RS422 or RS485.
Pinout of the RJ45 connector:
| 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\>
Adaptor cable from RJ-45 to 9-pin Female D-SUB:
| RJ45 - AlphaCom E | 9 p Female DSUB |
|---|---|
| 3 | 2 |
| 5 | 5 |
| 6 | 3 |
Cabling between RIO unit and AlphaCom E using multidrop RS485:
AlphaCom RIO #1 RIO #n
Serial 1 15 pin DSUB 15 pin DSUB
RJ45
1 -----------------+-- 9 --+----------------+-- 9
| | |
--- 11--- --- 11
7 -----------------+-- 2 --+----------------+-- 2
| | |
--- 4 --- --- 4
In the 15 pin DSUB of the RIO unit pin 2 & 4 and 9 & 11 must be connected together.