10 W
10 W
10 W
10 W
20 W
20 W
4
2
8
9
90
1
5
6
7
PIN
0
IN1
IN2
IN3
230 V~
230 V~
Amplifier 1309.1
1309.1 20 W Amplifier with override input. 230 V~
To be used when the audio output of another
MILLENNIUM
device requires whether a nigher power
or the connection with a bigger number of loudspeakers.
10 + 10 W (2
W
) / 20 W (4
W
) amplifier.
With 3 mixed audio inputs, one of them adjustable plus another with override.
It can be used as general line junction box.
230 V~ power supply.
Schematics
1
PIN position
for terminal block "0" to operate
TECHNICAL SPECIFICATIONS
1309.1
Power supply
Consumption
Power
230 V~
40 VA
20 W; minimum line impedance 4
W
or 10 + 10 W; minimum line impedance 2
W
There are three
IN
inputs in the amplifier. The gain of two of them is constant, while the gain of the third one is adjustable. These inputs are added (mixed) internally giving as a result
an input signal to the multiplexer.
If the audio signal reaching a
PIN
or a
IN
input of this amplifier comes from a
MILLENNIUM
device, its origin can be a
OUT
output (such as those present in auxiliary input modules or
in volume regulators for microphone bases) or the
+
terminal of a control unit. In these cases, the micro-controller of the amplifier detects a direct voltage component (7V ) that is
transmitted together with the audio signal and it reacts to that signal by giving access to it according to the above explained priority order. This 7 V signal is typical of the
MILLENNIUM
devices, except for the
1205
.
The order of priority of the amplifier inputs is the following (from higher to lower):
1) Audio signals arriving at the
1
terminal block if the digital information at wires
9
and
90
confirms that there is a general call or a private message to this zone-.
2) Audio signals arriving to the
PIN
input (see below for connection of non-
MILLENNIUM
devices).
3) Audio signals arriving to the
IN
inputs.
Whenever an audio signal reaches one of these inputs, all the inputs that have a lower priority level fade down and remain silent as long as the new signal is present.
Normally non-
MILLENNIUM
audio sources should be connected to the sound system through their specific pre-amplifiers (
1105, 1106
and
1107
). If we wanted an audio signal that
does not come from a
MILLENNIUM
device to directly enter the amplifier, we must connect it to the
PIN
input. In order for this signal to be detected by the
PIN
input, a signal of 15V
must be provided to the terminal block
0
, and it will have to remain present as long as we want the signal to keep being broadcast.
Regarding the amplified output, it can be configured in two different ways: two 10 W outputs over a minimum load of 2 W each or as a single 20 W output over a minimum 4
W
load.
The amplifier itself is able to detect how the speakers are connected (if connected only to the 20 W output or if distributed between the two 10 W outputs) and gets automatically self-
configured according to this.
ONLY ONE CONFIGURATION CAN BE USED.
Speakers output
Ground
Power supply output 15 V
NOT FUNCTIONAL
Terminal blocks to use the amplifier
as a junction box of the general line
Priority
audio input
Priority control input.
A 15 V signal here will give priority
to non-
MILLENNIUM
signals at the PIN input
(optional)
Adjustable audio input
Direct audio input
Direct audio input
NUMBER OF SPEAKERS
Up to 4 speakers
Up to 8 speakers
8 + 8 speakers
16 + 16 speakers
16
W
20 W
32
W
10+10 W
1 speaker
2 + 2 speakers
4
W
Output +7 V to activate
inputs
IN
or
PIN
of other
modules.
10
10
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