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the 5 "Inputs" pins would be pulled to ground to activate them, and they share a common pin for a high-
side rail, on Pin #10. If more than one remotely-controlled device is to be connected to a single 15-pin
I/O port, you must make sure that the two units in question have the same ground potential or ground
loops will occur. Therefore, it is recommended that only one remote device be connected to each I/O
port connector to assure complete electrical isolation.
The Axia accessory modules use the 5vDC
supply to illuminate LED based buttons. So a
one-to-one pin connection is all that is needed
between any accessory modules and a GPIO
port.
Note, all of the inputs and outputs on a specific
GPIO port are "grouped together". The 5 "Outputs"
are on 5 separate output pins, however, they share
the same "Common Return" connection on Pin #7.
Similarly,
© 2016 Axia Audio - Rev 2.0
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