•
Enable ACK Relay:
here you can set the closing of a Logic Output Channel relay as soon as
zones where an event has to be played are freed from higher priority events.
•
Enable Busy Relay:
here you can specify an Logic Output Channel relay that will be closed as
soon as you will trying to speak in zones where a higher priority event currently playing.
8.32 Create a Monitorable Button
The surveillance of a contact line, a microphone line or speaker line is based on the same
measurement. An internal voltage source is applied to the input or output terminal. By measuring this
tension, it is possible to know the state of the input or output.
With a normal contact (see picture below), you only will be able to measure two states: Open or
Shorten. Shorten (when contact is closed) forces the voltage source to zero.
FigAnnexe 1
In this case, the measurement unit can only detect 0V (closed) or 4.4 V (opened). In order to have
different state measurement like open line and short-circuit we need to add a resistor network to the
end of the line, see picture below.
FigAnnexe 2
Using the resistor Network, the measurement unit can detect 4 different states: 1.3 V, 2 V, 2.7 V and
4.4 V. The 4 states correspond respectively to Shortcut, Closed Contact, Opened contact and Absent
(open line).
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