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Example uses of the GPIO port lines
Given the flexibility of the GPIO lines on the
undoubtedly be many uses beyond what we intend, but just to help, here are
some examples of how we envisage the port to be used.
Connection to building management systems to report amplifier errors
As explained earlier, the general purpose output line and its associated relay,
may be configured through ICORE to trigger on a variety of error conditions.
In this example, we will configure the line to trigger if the amplifier goes into
protect.
In ICORE, select the amplifier and open its properties window
(View
Device Properties)
If multiple amplifiers are required to all be connected to the same "sense" line,
then the relay output must be used. In this case, connect the appropriate
"trigger" voltage to the common relay contact and parallel up the normally open
contacts, as shown overleaf:
Amplifier Operator's Manual
If the building control system will recognise a 3V3 signal,
then just connect its "sense" input to pin 1 of the GPI port.
If the system requires a higher voltage (12V and 24V are
common) then connect an appropriate supply to the
common relay pin (pin 2) and the "sense" input to the
normally open relay contact (pin 1).
Ti Series
of amplifiers, there will
Set the GPIO Config
"Output" property to
"A/P Monitor", and the
"Aux Relay" property
to "Follows GP Out".
This ensures that,
should the amplifier go
into "Protect" for any
reason, it will send the
output pin on the GPI
port high, and also flip
the state of the relay.
Page 39
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