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| 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.
| | #REDIRECT [[Serial port pinout]] |
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| The serial port 0 can be RS232 only, the serial port 1 can be RS232, RS422 or RS485.
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| The RJ45 pinout is as follows:
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| {|border="1"
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| |-
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| !width="90pt"|
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| !style="background:#ffdead;" width="100pt"|AlphaCom E
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| |-
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| |RS232||3 = TX<br\>6 = RX<br\> 4&5 = GND
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| |-
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| |RS422||1 = RX-<br\>2 = RX+<br\>7 = TX-<br\>8 = TX+
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| |-
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| |RS485||1/7 = Data - <br\> 2/8 = Data+
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| |-
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| |}
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| <br\><br\>
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| [[RIO]]: Multidrop (RS485) cabling: | |
| <pre>
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| AlphaCom RIO #1
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| Serial 1 15 pin DSUB
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| RJ45
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| 1 -----------------+-- 9
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| --- 11
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| 7 -----------------+-- 2
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| --- 4
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| </pre>
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