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11
NOTE
The use of the dry contact inputs will priority over the digital control functions. There won’t
be any direct feedback or monitoring possible through to the digitally controlling devices.
All connects must be “dry” contacts (voltage free)
Relay input contacts:
The relay input connections are available on the upper side of the ARU20x and are marked
with the x2 (x2’) and x4 (x4’) indicators. The x2 marked contacts are normally closed contacts,
while the x4 marked contacts are normally open contacts.
Relay output contacts:
The relay output connections are available on the lower side of the ARU20x and are marked
with the x1 and x1’ indicators where the ‘x’ stands for the relay number. Both contacts with
the same number are switched by the same relay.
Ground contacts:
When switching differential signals, the ground (common) shall be connected to the ‘G’
terminals.
Contact description
Line output APM:
When an APM1xx series paging console is connected to the ‘RS485’ databus, the analogue
line output signal from the paging console is available on this terminal. The line output is a
balanced audio signal.
This signal shall be fed to all the relay inputs which are meant for switching the paging audio
signal to the outputs and the connection should be done by external wiring. When connecting
the analogue output signal to an external amplifier, this terminal should be used as well.
Music / paging input:
All contact pairs are labelled with a double digit number, the first number indicates the
relay number, the second number indicates the type of contact. An example of such contact
configuration (relay 5) is shown below, contact 51 is connected to 52 for a normal closed
connection and 54 for a normal open connection.
Connections
x1
Out
x2
NC
x4
NO
G
Ground
Multiple simultaneous connections (NO and NC) are possible. In neutal position, the relay
will return back to its idle state, which has the normal closed contacts enabled (contacts
x2). Same situation will happen in case of a power shutdown, which makes the relay return
back to the idle state, meaning contacts x2 are connected.
Summary of Contents for ARU20 Series
Page 1: ...ARU20x User Manual www audac eu ...
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Page 8: ...8 ...
Page 27: ...27 Notes ...
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