Audio Outputs - Dynacord DPA 8225 Bedienungsanleitung

PROMATRIX 8000
Illustration 2-2: Unbalanced wiring of an audio input

2.4 Audio Outputs

The audio outputs of the DPA power am-
plifier are galvanically separated and are
constantly monitored for ground fault.
The loudspeaker cables are connected
to the DPA power amplifier using screw-
lock connectors (supplied with the am-
plifier). The 6-pin plug that is used for
the connection can be removed for easy installation. The
maximum cable diameter is 1.5 mm² when using the
screw-lock connection method. It is possible to connect a
maximum of as many loudspeaker systems as it takes, until
the total power consumption of the entire loudspeaker
network equals the rated output value of the power ampli-
fier and as long as the nominal load impedance of the pow-
er amplifier outputs is not exceeded. For more information
about the actual values of rated output and nominal load
impedance, please refer to the chapter "Specifications"
(page 30). Please also refer to the paragraph"Integrated
Relays" on page 9.
Figure 2-3: Example of a DPA 8225 with a load of 8 x 30 W =
240 W or respectively 41 x 6 W = 246 W at the outputs of the
power amplifier
DPA 8000 - 8
CAUTION: It is possible that during operation shock-
hazard voltages (>34 V peak value) may be
present at the outputs. Therefore, the con-
nected loudspeaker zones have to be
installed in accordance with applicable
safety regulations. When installing and
operating 100 V loudspeaker networks,
compliance with the VDE regulation DIN
VDE 0800 is mandatory. Especially, when
100 V loudspeaker networks in alarm sys-
tem applications are concerned, all safety
precautions have to be in accordance with
the safety class 3 standard.
C O T O
ONFIGURATION F HE UTPUT
The default stetting of the output voltage of the audio out-
puts is 100 volts. The connection of the output transformer
needs to be rewired when the setting is changed to 70
volts or 50 volts. For this purpose carry out the following
steps:
1. Turn the power amplifier off.
2. Disconnect the power amplifier from the mains and
the DC voltage supply.
3. Wait approximately 2 minutes until the internal
capacitors have been discharged.
4. Remove the 12 screws in the power amplifier's cover
plate (see illustration 2-4).
Illustration 2-4: Removing the cover plate of the power amplifier
5. Remove the cover plate of the power amplifier. The
following illustration shows the 7-pin clamp termi-
nals inside of the appliance that are used for config-
uring the output voltage.
NOTE: Each clamp terminal represents an output
channel. The illustration 2.5 shows the
DPA 8412 power amplifier with the four
clamp terminals AMP 1 to AMP 4. Looking at
the power amplifier from the front, the
clamp terminals are numbered in ascending
order from left to right (see also the imprint
on the printed board). Power amplifiers
with two or only one output channel corre-
spondingly provide fewer clamp terminals.
V
OLTAGE