Dynacord DPA 4411 Utilization, Installation Notes, The amplifier has to be protected against

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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