1. Utilization
The amplifier DPA 4411 has been specially designed to ensure durable performance and reliable
operation of sound reinforcement systems with several independent loudspeaker lines. The DPA 4411 is
best suited for call and message transmission installations, alert systems, and for general music
applications in industrial enterprises, offices, multi-function halls and sport arenas, schools, churches,
hotels, hospitals, super markets, cruise ships, and similar applications.
2. Installation Notes
When installing or mounting the amplifier, it is important to make sure that unhindered air-flow from the
air inlets on the front to the air outlets on the rear of the appliance is guaranteed (see paragraph 10).
To maintain EMV disturbance-free operation, the use of shielded cable for all input, output and control
lines, except for mains supply and battery cords, is mandatory. When installed inside of metal housings
or rack systems, running unshielded output and control lines is possible. Cable screens have to be
connected to the enclosure or rack system ground potential.
The amplifier has to be protected against:
- dropping or splashing water
- direct sunlight
- high environmental temperatures or direct radiation of heat sources
- high humidity and moisture
- dust
- shock or vibration
It is not permissible to place containers filled with liquids - e. g. vases - ontop of the appliance
When moving the amplifier from cold into warm environments, condensation of its inner parts can
sometimes occur. If so, the appliance can be operated again after gaining the environmental temperature
(approximately after one hour).
If a solid object has fallen or liquid has leaked into the device, disconnect all connectors and get in contact
with an authorized DYNACORD service center. Do not operate the amplifier after such accidents.
When cleaning the amplifier’s outside enclosure, never use any cleaning sprays or detergents, because
of inflamability. The use of those liquids will damage the appliance.
3. Before Initial Operation
3.1 Mains Operation
When operated on mains power, use the included mains cord to connect the amplifier to a 230 V or 115
V 50/60 Hz wall outlet. Connect the cable’s other end to the appliance’s 3-pole machine-type socket (10).
Caution
The amplifier is factory-set to
230 V AC
. To change the setting to 115 V AC, use the
voltage switch (12).
For the operation with
115 V AC
, the mains fuse (11) has to be replaced by an 8 Ampère
slow-blow fuse with the label print
“T8AL”
(see also paragraph 12).
When correctly connected and with mains power present the green STANDBY indicator (4) will light. Now,
through sending the corresponding command via the serial interface of the Remote Module, it is possible
to start the amplifier from the PROMATRIX Manager DPM 4000 (see PROMATRIX handbook).
The POWER switch (9) on the rear of the amplifier – for bridging the starting relay – is meant for service
purposes only. It offers the possibility to operate the amplifier without remote start.
Note
The POWER switch (9) on the rear of the appliance is for service purposes only. Remote
power-off is not possible with the POWER switch set to ON. In this case, the STANDBY
indicator (4) provides no function.
The DPA 4411 is equipped with a cut-in delay of approximately 3 seconds to efficiently suppress power-on
noise. After this period of time and when no fault was detected, the green READY indicators (7) will light
(see paragraph 7.2).
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