POWER AMPLIFIER DPA 4411

OWNER’S MANUAL

Features

Power amplifier with 4x100 W output power capacity according to IEC 283-3

19" - rack size (3 HU) unit that provides the following functions:

•

Mains operation 115/230 V AC and operation with emergency power supply of 24 V DC

•

Output transformers for balanced, floating 100 V loudspeaker networks: 70 V, 50 V or

4 ohms for low-impedance operation can be selected

•

All outputs are protected against idling and short-circuit

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Integrated Remote Module for control and monitoring using the PROMATRIX Manager DPM 4000

•

Electronic level controls, electronically balanced inputs and electronically balanced MONITOR output

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Input transformer for balanced, floating inputs can be retrofitted

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Monitor output transformer for balanced, floating MONITOR output can be retrofitted

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Routing switch for parallel operation of the amplifier’s inputs

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Integrated Standby Power Supply

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Mains function switch - POWER

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Ground lift switch

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Remote-Start function for mains and battery operation with inrush current limiter protection

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Power-on noise attenuation

•

Status-LED indicators: operation (READY), STANDBY, thermal overload (PROTECT) and GROUND FAULT at the power outputs

•

Fault notification according to DIN EN 60849 via the PROMATRIX Manager DPM 4000

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TEST-switch for systems with average-switching or GROUND FAULT RESET

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LED meters with a range from -13 dB to 0 dB plus CLIP indication

•

Mains voltage selector switch 115/230 V AC

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Active, temperature-controlled ventilation

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Modules for pilot tone surveillance and ground fault surveillance according to DIN VDE 0800 are optionally available

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IMPORTANT SAFETY INSTRUCTIONS

The lightning flash with arrowhead symbol, within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintance (servicing) instructions in the literature accompanying the appliance.

1.

2.

3.

4.

5.

6.

7.

Read these instructions.

Keep these instructions.

Heed all warnings.

Follow all instructions.

Do not use this apparatus near water.

Clean only with a damp cloth.

Do not block any of the ventilation openings.

8.

Install in accordance with the manufactures instructions.

Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.

9.

Only use attachments/accessories specified by the manufacturer.

10. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

For US and CANADA only:

Do not defeat the safety purpose of the grounding-type plug. A grounding type plug has two blades and a third grounding prong.

The wide blade or the third prong are provided for your safety. When the provided plug does not fit into your outlet, consult an electrican for replacement of the absolete outlet.

IMPORTANT SERVICE INSTRUCTIONS

CAUTION: These servicing instructions are for use by qualified personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in the Operating

Instructions unless you are qualified to do so. Refer all servicing to qualified service personnel.

1. Security regulations as stated in the EN 60065 (VDE 0860 / IEC 65) and the CSA E65 - 94 have to be obeyed when servicing the appliance.

2. Use of a mains separator transformer is mandatory during maintenance while the appliance is opened, needs to be operated and is connected to the mains

3. Switch off the power before retrofitting any extensions, changing the mains voltage or the output voltage.

4. The minimum distance between parts carrying mains voltage and any accessible metal piece (metal enclosure), respectively between the mains poles has to be 3 mm and needs to be minded at all times.

The minimum distance between parts carrying mains voltage and any switches or breakers that are not connected to the mains (secondary parts) has to be 6 mm and needs to be minded at all times.

5. Replacing special components that are marked in the circuit diagram using the security symbol (Note) is only permissible when using original parts.

6. Altering the circuitry without prior consent or advice is not legitimate.

7. Any work security regulations that are applicable at the location where the appliance is being serviced have to be strictly obeyed. This applies also to any regulations about the work place itself.

8. All instructions concerning the handling of MOS - circuits have to be observed.

Note: SAFETY COMPONENT (HAS TO BE REPLACED WITH ORIGINAL PART ONLY)

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Indicators, Controls And Connections

13

14

15

16

9

10

11

12

5

6

7

8

1

2

3

4

LED meters with a range from -13 dB to 0 dB

CLIP indicators

TEST button for checking and reset function

STANDBY indicator

PROTECT indicator

GROUND FAULT indicator

READY indicator

Air inlets

POWER ON switch

AC MAINS INPUT connector

Mains fuse

VOLTAGE SELECTOR switch

REMOTE CONTROL connectors

STATUS indicator

INPUT connectors 1-4

ROUTING switch for INPUT 1-4

17

18

Device address label field

ADDRESS selector switch

19 POWER OUTPUT

20 Device output configuration label field

21 Air outlets

22 CIRCUIT

⊥

TO CHASSIS SWITCH

23 DC INPUT 24 V =

A Rear plate screws: 6 oval-head sheet-metal screws 3.5 x 6.5 zinc-coated DIN 7981

B heat-sink-mounting: 4 oval-head sheet-metal screws 3.5 x 9.5 zinc-coated DIN 7981

C PCB-mounting:

D socket-mounting:

9 oval-head screws M3 x 12 nickel-plated DIN 7985

8 oval-head screws PT-KA 30 x 8 WN-1412EJOT black, zinc-coated

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Table of Contents

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Indicators, Controls And Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1. Utilization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2. Installation Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3. Before Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1 Mains Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.2 Battery Operation 24 V DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4. Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5. Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.1 POWER OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.2 POWER OUTPUT for the connection of 100 V loudspeaker systems . . . . . . 25

5.3 POWER OUTPUT for the connection of low-impedance loudspeaker systems 25

5.4 POWER OUTPUT 100 V - Double Output Power . . . . . . . . . . . . . . . . . . . . . . 26

5.5 MONITOR Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6. Integrated Remote Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7. Indicators And Fault Notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.1 STANDBY Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.2 READY Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.3 PROTECT Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.4 GROUND FAULT Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.5 Meter Instruments And CLIP Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.6 STATUS Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

8. Switching The Output Voltage (refer to qualified service personnel only!) . . . . . . . 28

9. Additional Functions And Features (refer to qualified service personnel only!) . . 29

9.1 NRS 90206 Pilot Tone Surveillance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

9.2 NRS 90207 Ground Fault Surveillance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

9.3 NRS 90208 Input Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

9.4 NRS 90227 Monitor Output Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

10. 19"-Flightcase Or 19"-Rack System Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 32

11. Ground Lift Switch CIRCUIT

⊥

TO CHASSIS SWITCH . . . . . . . . . . . . . . . . . . . . 33

12. Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

13. DPA 4411 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

14. Specifications For DPA 4411 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

14.1 NRS 90206 Pilot Tone Surveillance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

14.2 NRS 90207 Ground Fault Surveillance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

14.3 NRS 90208 Input Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

14.4 NRS 90227 Monitor Output Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

15. Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

15.1 DPA 4411 Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

15.2 NRS 90206 Pilot Tone Surveillance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

15.3 NRS 90207 Ground Fault Surveillance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

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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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3.2 Battery Operation 24 V DC

The amplifier DPA 4411 can either be operated on the AC mains or connected to an external 24 V battery power source. Switching to battery operation is accomplished via internal relay.

The battery has to be connected to the corresponding socket (23) on the rear panel of the appliance using insulated AMP flat connectors 6.3x0.8 mm. The amplifier is protected against confusion of poles.

Additional internal protection is provided through two miniature fuses – F502 and F503 – one per each conductor (+ and -), which are located on the printed board assembly 85272 (see paragraph 12, diagram

11). For the DPA 4411 the battery cable’s diameter should be at least 2.5 mm

2

and the cable length for the single distance should not exceed 4.0 m (max. drop in voltage < 1V).

Caution Operation of the DPA 4411 is solely allowable using batteries without grounding or batteries with grounding of the negative pole. Operation with batteries with grounding of the positive pole is not permissible.

4. Inputs INPUT 1 to INPUT 4

The inputs INPUT 1 to INPUT 4 (15) are electronically balanced. With a sensitivity of 775mV = 0dBu they are meant for the connection of control amplifiers. For the case that floating inputs are needed, the inputs are prepared for retrofitting input transformers.

Note If a switch-contact is located between the control amplifier output and the power amplifier input, switch clicks might become audible during switching. If this is the case, incorporating input transformers (NRS 90208 - one per input) can solve the problem (see paragraph 9.3)

Parallel operation of INPUT 1 to INPUT 4 (15) is possible when using the ROUTING switches (16). This allows to connect the input signal through to feed several power amplifiers with the identical program. Use a permanent marker pen to mark the needed setting of the ROUTING switches (16) next to the ROUTING switch push-button symbol.

diagram 1 input socket connection diagram 2 LF-cable for coupled operation of two DPA 4411

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5. Outputs

5.1 POWER OUTPUT

All power outputs are balanced and floating. When factory-shipped, the outputs are pre-configured for the connection of 100 V loudspeaker systems. Connection is achieved through plugging the supplied 8-pole socket into the connection strip (19). Switching the output transformer allows to change the output voltage to 70 V, 50 V or 20 V (see paragraph 8). When set to 20 V, operation of low impedance speakers with a load of 4 ohms is possible.

Caution During operation it is possible that the outputs of the POWER OUTPUT connector may conduct dangerous voltage (>34 V in peaks). Therefore, observing applicable safety regulations is mandatory when connecting and installing loudspeaker lines

(see also paragraph 9.2).

5.2 POWER OUTPUT for the connection of 100 V loudspeaker systems

The use of speaker systems with 100 V matching transformers is recommended to reduce the lack in performance when the distance between amplifier and speaker systems exceeds 50 m. This m ethod also offers an easy way to distribute the output power. The total power consumption of the maximum amount of the connected speakers in the network has to match the amplifier’s overall output capacity of 100 watts

(connection impedance 100 ohms). The connection is accomplished via the 100 V output (19)

(see figure 3).

diagram 3 Connection of 100 V (70 V or 50 V) loudspeaker systems

5.3 POWER OUTPUT for the connection of low-impedance loudspeaker systems

When switching the output to 20 V, low-impedance speaker systems (4-16 ohms) can be connected to the corresponding output (see diagram 4). Because of line attenuation, the distance between amplifier and speaker systems should not exceed 50 m. It is of further importance that the overall impedance of the speakers does not decline 4 ohms and that the individual power handling capacity of each speaker is not exceeded. diagram 4 Connection of low-impedance loudspeaker systems

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Free combination of the DPA 4411’s power output voltages, including mixed 100 V and low impedance

(4 ohms) operation, is possible.

5.4 POWER OUTPUT 100 V - Double Output Power

If the output power of one output of the DPA 4411 is not sufficient to feed all cabinets within a speaker network and dividing the speaker chain is not an option, it is possible to double the output power by coupling the outputs of two amplifiers. In that case the amplifier inputs have to be paralleled and the outputs are connected in series. For the connection of inputs, please refer to paragraph 4. For the connection of the loudspeaker network, refer to diagram 5.

Coupling is possible under the following restrictions: only identical amplifiers or power amps can be connected. Since doubling the output voltage comes along with serial connection, it is necessary to switch the outputs of both amplifiers to 50 V (see also paragraph 8), resulting again in an overall output voltage of 100 V. In this case the speaker chain’s minimum load impedance is 50 ohms // 50 nF. The input level controls of the corresponding channels of the DPA 4411 have to be set to equal values (refer also to the

PROMATRIX handbook).

This results in the following output combinations with a single DPA 4411:

4 x 100 W or 2 x 100 W + 1 x 200 W or 2 x 200 W. diagram 5 Possible output configuration of the DPA 4411

5.5 MONITOR output

The MONITOR output of the DPA 4411 is configured as monitor bus. It gets connected to the PROMATRIX

Manager DPM 4000 via the serial port REMOTE CONTROL (13). If a floating output is needed, the output is prepared for retrofitting a monitor output transformer. In this case the extension NRS 90227 is necessary

(see paragraph 9.4). The low-impedance monitor output is electronically balanced. Therefore, the connected cables may be up to approx. 200 m in length.

The PROMATRIX Manager DPM 4000 (see PROMATRIX handbook) offers connection for monitor amplifiers; which can be set to input-monitoring or output-monitoring for the desired amplifier channel.

6. Integrated Remote Module

The integrated remote module of the power amplifier DPA 4411 provides the following functions:

• input levels of INPUT 1 to INPUT 4 can be set via programmable audio level controls

• reading level values of the audio level controls

• setting level offsets 1 to 4 via virtual controllers

• mute function 1 to 4 (via level controls)

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• mains operation remote control ON/OFF

• battery operation remote control ON/OFF

• monitoring and fault message transmission via the PROMATRIX Manager DPM 4000; in accordance to DIN EN 60849 standard

− thermal overload of the mains transformer

− thermal overload of power output stages 1 to 4

− monitoring of the functioning of the power output stages 1 to 4 via pilot tone signal (optional, only with

NRS 90206 installed)

− ground fault detection for loudspeaker lines 1 to 4 (optional, only with NRS 90207 installed)

− measuring of input and output level peaks 1 to 4

− measuring of output voltages / levels of the power outputs 1 to 4

− measuring of output currents of the power outputs 1 to 4

− monitoring of connected loads 1 to 4 via current-voltage-measuring

− recognition of amplifier type including user-definable name

− reading of software revision of the remote module

− reading of error flags

− reading of the output configuration

− recognition of extensions NRS 90206 and NRS 90207

• switching the input monitor / output monitor 1 to 4 to the monitor bus

• pilot tone signal ON/OFF (optional, only with NRS 90206 installed)

• ground fault error flags reset

Note Prior to the first operation of the amplifier DPA 4411, you have to set the amplifier address using the two Hexadecimal Code switches ADDRESS (18) (refer to the PROMATRIX

handbook) and using a waterproof marker pen mark the setting in the ADDRESS label field on the rear panel of the appliance.

By sending the corresponding command via the serial port REMOTE CONTROL (13) of the remote module, this function is activated from the PROMATRIX Manager DPM 4000 (see PROMATRIX handbook).

7. Indicators And Fault Notification

7.1 STANDBY Indicator

When correctly connected and with mains voltage and/or battery voltage present, the green STANDBY indicator (4) lights.

7.2 READY Indicator

The power amplifier DPA 4411 provides a power-on delay of approximately 3 s to prevent switch clicks from becoming audible. If after this period of time no faulty condition has been detected, the green READY indicator (7) lights and the mute-relays pull. When thermal overload of the mains transformer or of one of the power output stages is detected, the corresponding green READY indicator (7) will not light and the according mute-relay drops. If, with the NRS 90206 extension installed the pilot-threshold (see paragraph

9.1) is declined, the corresponding green READY indicator (7) goes out but the amplifier stays operational and a fault message gets transmitted to the PROMATRIX Manager DPM 4000.

7.3 PROTECT Indicator

In case of thermal overload of the mains transformer or of a power output stage is detected, the red

PROTECT indicator (5) will light. During thermal overload of the mains transformer, all mute-relays drop while during thermal overload of a power output stage, only the according mute-relay drops. After the mains transformer or the power amplifier have regained their normal temperature, the red PROTECT indicator (5) automatically goes out and the appliance recovers normal operation mode. The faulty condition could have been caused by either overload, too high environmental temperature, or by an error in the ventilation system. A fault-message is transmitted to the PROMATRIX Manager DPM 4000.

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7.4 GROUND FAULT Indicator

If, with built-in NRS 90207 a ground fault condition at one of the power outputs occurs, the corresponding red GROUND FAULT indicator (6) lights and a fault-message is transmitted to the PROMATRIX Manager

DPM 4000. The power amplifier keeps up normal operation during the occurrence of this fault-type. After solving the problem, the GROUND FAULT indicator (6) can be reset by pressing the TEST button (3) or by sending the corresponding command via the serial port of the PROMATRIX Manager DPM 4000 (see

PROMATRIX handbook) (see paragraph 9.2).

7.5 Meter Instruments And CLIP Indicators

The green LED-indicator -13 dB and 0 dB (1) as well as the red LED-indicator CLIP (2) allow the precise monitoring of output levels, providing the possibility to securely prevent distortion and clipping that could lead to damaging the connected loudspeaker systems.

- When during program peaks the red CLIP-LED (2) lights briefly, the maximum distortion-free output

is gained.

- Whenever the CLIP-LED (2) lights continuously, the amplifier is driven into overdrive and the input level

should be reduced.

- Overload or short-circuit at the output is the cause for the green LED-indicator (1) to be out or only briefly

lit while at the same time the red CLIP-LED (2) blinks. In that case, please check the impedance of the

connected load.

Caution During normal operation, the red CLIP-LED (2) should hardly light and if, than only very briefly !

7.6 STATUS Indicator

The yellow STATUS-LED (14) that is located on the rear of the appliance lights briefly during normal operation when the DPM 4000 addresses a query to the amplifier. For further information, please refer to the PROMATRIX handbook.

8. Switching The Output Voltage (refer to qualified service personnel only!)

The DPA 4411 offers output voltages of either 20 V, 50 V, 70 V or 100 V. The output voltage is factory-preset to 100 V. Switching the output voltage to 20 V, 50 V or 70 V should only be carried out by qualified DYNACORD service personnel.

Caution Unplug the mains cord and disconnect batteries before opening the appliance!

- for opening the appliance, please remove the 9 screws on the top of the appliance that lock the cover

plate.

- the four output transformers 356762 are located on the left hand side of the appliance. They are

numbered 1, 2, 3, and 4; starting from the rear cover plate of the appliance.

- for changing the output voltage (see diagram 6) you have to unsolder the orange wire attached to the

transformer’s soldering tab 19 (100 V) and solder it instead to the required soldering tab (70 V, 50 V or

20 V).

- closing the appliance: use the 9 screws M3 x 6 DIN 7500 to reattach the cover plate.

diagram 6 Switching the output voltage at the output transformers 356762

diagram 7 Output configuration settings of the amplifiers (rear view)

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Note After changing the output voltage, use a waterproof marker pen to note the correct, newly set value on the label-field OUTPUT VOLTAGE (20) on the rear of the appliance.

Additionally note the corresponding output configuration (see diagram 5) on the label OUT

CONFIG TYPE (20).

According to the description in diagram 7, adjust the switches S801 and S802 on the printed board assembly 89019.2 that are located next to the transformers on the bottom of the appliance’s enclosure (refer also to paragraph 5.4 ). diagram 8 Printed board assembly 89019.2 showing the position of the switches S801 and S802

9. Additional Functions And Features (refer to qualified service personnel only!)

9.1 NRS 90206 Pilot Ton Surveillance

Using the extension-kit NRS 90206 provides continuous monitoring (surveillance) of the individual amplifier channels. This is achieved by sending an ultra low-level 19 kHz pilot tone through the device. It enters the signal path post level controls, runs through the amplification stages and gets filtered out and evaluated at the output. In case the result of this evaluation shows that the pilot dropped beneath a defined threshold or is missing at all, the corresponding READY indicator AMP 1 - 4 (7) goes out but the power amplifier upholds its normal operation. A fault-message is transmitted to the PROMATRIX Manager DPM

4000 (see PROMATRIX handbook). The extension-kit NRS 90206 comes as a plug-in board assembly and consists of a 19 kHz tone-generator and four selective 19 kHz receivers with evaluation stage.

Caution Unplug the mains cord and disconnect batteries before opening the appliance!

9.1.1 To Install The NRS 90206 Proceed As Follows (see diagram 9):

- for opening the appliance, please remove the 9 screws on the top of the appliance that lock the cover

plate.

- the NRS 90206 gets retrofitted on the printed board assembly 89019.1, which is located behind the input

printed board assembly 81331, in the front area, attached to the left side panel of the amplifier (in front

view).

- Be sure to first insert the included board-guides before installing the printed board assembly, assuring

the correct position of their guide grooves. The release lever of the guides marked “A” points to the top,

while the one of the guides marked “B” points downwards.

- the NRS 90206 extension-kit needs to be inserted with its printed side pointing to the top, until it firmly

locks in place. Make sure that the power resistors R917 to R920 that are located underneath the

NRS-printed board assembly do not touch this board.

- closing the appliance: use the 9 screws M3 x 6 DIN 7500 to reattach the cover plate.

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diagram 9 Printed board assembly 89019.1 showing the position of the modules NRS 90206 and

NRS 90207

9.1.2 Checking The Function Of The NRS 90206:

With built-in NRS 90206 and powered-on amplifier, the READY-indicators (7) have to light. Use the check and reset-button TEST (3) to check the functioning of the pilot tone surveillance. When holding the

TEST-button pressed, the 19 kHz tone-generator is switched off, the READY-indicators (7) go out and a fault-message is being transmitted to the PROMATRIX Manager DPM 4000 (see PROMATRIX handbook). Approximately 3 seconds after releasing the TEST-button, the READY-indicators (7) have to light again.

9.2 NRS 90207 Ground Fault Surveillance

The VDE regulation DIN VDE 0800 has to be obeyed when planning and operating 100 V sound reinforcement systems. Especially 100 V alert systems have to be in accordance with all protection measures for class 3 appliances.

We recommend the use of the ground fault surveillance module NRS 90207 for floating speaker network installations, offering surveillance of the network insulation. Error registration: A ground fault message signals that a damaged cable has been detected – possibly resulting in an upcoming cable interruption – or a wrongly connected cable, possibly resulting in malfunctioning. The information “ground fault” is memorized as long as the amplifier is powered on or a loaded battery is connected, even for short-term

( > 5 s) ground faults. The fault-message is transmitted to the PROMATRIX Manager DPM 4000 (see

PROMATRIX handbook).

The NRS 90207 extension comes as a plug-in printed board assembly and consists of a monitoring circuit with error-storage and display-driver for four 100 V outputs.

Caution Unplug the mains cord and disconnect batteries before opening the appliance!

9.2.1 To Install The NRS 90207 Proceed As Follows (see diagram 9):

- for opening the appliance, please remove the 9 screws on the top of the appliance that lock the cover

plate.

- the NRS 90207 gets retrofitted on the printed board assembly 89019.1, which is located behind the input

printed board assembly 81331, in the front area, attached to the left side panel of the amplifier (in front

view).

- Be sure to first insert the included board-guides before installing the NRS 90207, assuring the correct

position of their guide grooves. The release lever of the guides marked “C” points to the top, while the

one of the guides marked “D” points downwards.

- the NRS 90207 extension-kit needs to be inserted with its printed side pointing to the top, until it firmly

locks in place. Make sure that the power resistors R917 to R920 that are located underneath the

NRS-printed board assembly do not touch this board.

- closing the appliance: use the 9 screws M3 x 6 DIN 7500 to reattach the cover plate.

30

9.2.2 Checking The Function Of The NRS 90207:

With built-in NRS 90207 and powered-on amplifier, the READY-indicators (7) have to light. When using an external switch to shortcut one pole of the 100 V speaker network via a 47 k ohms resistor and the safety earthing conductor for approximately 5 seconds, the corresponding GROUND FAULT indicator (6) has to light. The fault-message is transmitted to the PROMATRIX Manager DPM 4000 (see PROMATRIX handbook). After releasing the external switch, indication and message have to stay present. Use the

TEST-button (3) to reset the ground fault surveillance function.

9.3 NRS 90208 Input Transformer For Floating, Balanced Inputs

In case floating inputs are needed, the inputs of the DPA 4411 are prepared for retrofitting input transformers; a separate NRS 90208 extension-kit is needed per input.

Note If a switch-contact is located between the control amplifier output and the power amplifier input, switch clicks might become audible during switching. If this is the case, incorporating input transformers can solve the problem.

Caution Unplug the mains cord and disconnect batteries before opening the appliance!

9.3.1 Retrofitting The NRS 90208 On The Printed Board Assembly 81331:

- for opening the appliance, please remove the 9 screws on the top of the appliance that lock the cover

plate

- detach the rear panel by removing the screws marked “A” to “D” (refer to the picture of the rear panel

on page 21).

- remove the input printed board assembly 81331: (see diagram 10)

remove the 8 screws marked “D” that tighten the input sockets and detach the 6 flat cables CN1 to CN6.

For removing the printed board assembly 81331 you have to unscrew the two screws on the side panel

- before installing the input transformer, make sure to unsolder the resistors for T1: R1/R5, for T2:

R9/R13, for T3: R17/R21, for T4: R25/R29 and clean the corresponding eyelets

- place the input transformer onto the printed board assembly 81331, so that the markings on the board

and on the bottom part of the transformer are aligned. As a protection against short-circuit, place the

supplied insulating disk between the printed board and the transformer

- before re-installing the printed board assembly 81331, reconnect the flat cables CN1 to CN6. Keep in

mind that the plug of the cable leading to CN1 (AMP1+2) is marked. Now, reconnect the printed board

assembly 81331 to the amplifier’s side panel, using two screws M3 x 12

- installation of the rear panel:

first, connect the POWER OUTPUT printed board assembly to the rear panel, using two screws marked

“C”. Make sure not to squeeze any wires. Now, you can slide the rear panel underneath the four

lock-fish-plates of the input sockets. In doing so, mind that the acknowledge button of the ROUTING

switches need to be pulled through the corresponding openings

input sockets are tightened with two screws marked “D”, each

the power supply printed board assembly 85272 gets tightened using two screws marked “C”; mind the

acknowledge button of the CIRCUIT

⊥

TO CHASSIS SWITCH.

tighten the Remote Control printed board assembly with two screws marked “C”; mind the yellow

STATUS-LED

tighten the mains-input printed board assembly 86243 using three screws marked “C”; tighten the mains

connector (10) and the mains selector switch (12) with individual screws and self-securing nuts M3

reinstall the rear panel using 6 screws marked “A”

tighten the heat sink using four screws marked “B”

- closing the appliance: reconnect the cover-plate using 9 screws M3 x 6 DIN 7500

31

diagram 10 Printed board assembly 81331 showing the position of the input transformers NRS 90208

9.4 Monitor Output Transformer NRS 90227 Offering A Floating, Balanced MONITOR Output

In case a floating MONITOR output is needed, the monitor amplifier’ output is prepared for retrofitting an output transformer. Herefore, you will need the extension kit NRS 90227.

Caution Unplug the mains cord and disconnect batteries before opening the appliance!

9.4.1 To Install The NRS 90227 Proceed As Follows: (see diagram 10)

- for opening the appliance, please remove the 9 screws on the top of the appliance that lock the cover plate.

- de-install the input printed board assembly 81331 following the description in the paragraph 9.3.1.

- disconnect the resistors R95, R96, R97 and R101 before installing the monitor output transformer.

- mount the monitor output transformer on the printed board assembly 81331; in doing so, polarity is of no importance, since the transformer is balanced.

reinstall the input printed board assembly 81331 following the description in paragraph 9.3.1.

- closing the appliance: use the 9 screws M3 x 6 DIN 7500 to reattach the cover plate.

10. 19"-Flightcase Or 19"-Rack System Installation

Caution Operating the DPA 4411 without cover-plate is not admissible.

When incorporating the DPA 4411 into a 19" flightcase or 19" rack system, make sure to leave room for sufficient air-flow. Between the amplifier’s rear plate and the inside-wall of the surrounding enclosure has to be at least 60 mm x 330 mm of space until up to the enclosures top or its ventilation gaps. At least 100 mm of space should be left above a rack system to guarantee sufficient air circulation. Since, during the operation of the DPA 4411 the environmental temperature within the rack closet may increase by about

10° C, minding the maximum allowable temperature values for other equipment that is installed into the same rack system or enclosure is of major importance.

Note For trouble-free operation of the appliance, the maximum environmental temperature of +40 °C is not to be exceeded.

32

11. Ground Lift Switch CIRCUIT

⊥

TO CHASSIS SWITCH

Using the ground lift switch CIRCUIT

⊥

TO CHASSIS SWITCH (22) lets you separate the audio signal ground from the enclosure ground (safety earthing). This helps to solve problems with hum or noise without jeopardizing safety standards. If several units with ground lift switch are installed in a common enclosure or rack system, it is recommended to set the ground lift switches of all devices but one to “ungrounded”.

Set to “ungrounded”, the impedance between signal ground and enclosure is: 100 k ohms // 100 nF. It is necessary to maintain the immunity from EMV.

12. Fuses

Location

Fuse switch (11)

Fuse switch (11)

Board 86243

Board 85272

Board 85272

Board 85272

Board 85272

Board 85272

Board 85272

Pos.

F601

F601

F602

F502

F503

F504

F505

F506

F507

Used for

Mains fuse 230 V~ AC

Mains fuse 115 V~ AC

Mains fuse AC

Battery fuse 24 V DC

Battery fuse 24 V DC

Power-AMP 1

Power-AMP 2

Power-AMP 3

Power-AMP 4

Value

T4AL 250V

T8AH 250V

T1AL 250V

25AL 32V

25AL 32V

T6.3AL 250V

T6.3AL 250V

T6.3AL 250V

T6.3AL 250V

Dimensions

5 x 20 mm

5 x 20 mm

8.5 x 8.45 mm

Flat type fuse

Flat type fuse

5 x 20 mm

5 x 20 mm

5 x 20 mm

5 x 20 mm

Standard

IEC 127

IEC 127

IEC 127

DIN 72581-3

DIN 72581-3

IEC 127

IEC 127

IEC 127

IEC 127

Changing The Fuses F502 And F503 (see diagram 11):

Caution Unplug the mains cord and disconnect batteries before opening the appliance!

The battery fuses F 502 and F503 are located on the mains (power supply) printed board assembly 85272 behind the AMP-battery connectors. In case they need to be replaced, commence as follows:

- open the appliance by removing the 9 screws that lock the cover-plate

- remove the mains input printed board assembly 86243 that is located at the rear inner wall.

Therefore, unplug the yellow/green ground conductor form the corresponding connector at the rear inner wall. To remove the AMP-plug, press its lock-piece

- now, you have to remove the 3 screws of the mains-input printed board assembly 86243 marked “C”

(refer to the picture of the rear panel on page 21).

- disconnect the 6-pole flat cable between the two relays on the mains-input printed board assembly

86243 that is connected to the male multi-point connector B602

- now, the hinged mains-input printed board assembly 86243 can be turned up. In doing so, be careful not to damage any wiring or other parts

- the fuses F502 and F503 are now easy to get to and can be removed to the top

- for re-installing the mains-input printed board assembly 86243, proceed in opposite order: tighten the mains-input printed board assembly 86243 with the 3 screws marked “C”, where each, the mains plug (10) and the mains selector switch (12) need to be connected using individual screws and self-securing nuts M3.

- reconnect the 6-pole flat cable to the multi-point connector B602

- reconnect the yellow/green ground cord to the ground connector on the rear panel; make sure that it sits tight

- closing the appliance: reattach the cover-plate with 9 screws M3 x 6 DIN 7500

33

Caution For safety reasons make sure that after reassembling, wires running underneath the mains-input printed board assembly 86243 are run with a minimum distance of at least 6 mm.

diagram 11 Printed board assembly 85272 showing the position of the DC-fuses F502 to F507

34

13. DPA 4411 Specifications

Power supply on mains operation: operation voltage mains frequency range safety class mains operation

Standby

0idling

Normal operation (-10 dB)

Alarm (-3 dB)

Nominal conditions mains initial current inrush

U mains

[V]

230

230

230

230

230

I mains

[A]

0,016

0,29

1,64

3,25

4,39

I

115 V / 230 V~ AC, ±10 %

50 - 60 Hz

P mains

[VA]

3,7

67

377

748

1010

< 36 A

P mains

[W]

1,5

40

275

585

815

P out

[W]

0

0

40

200

400

P v

[W]

1,5

40

235

385

415 mains operation

Standby

0idling

Normal operation (-10 dB)

Alarm (-3 dB)

Nominal conditions mains initial current inrush

U mains

115

115

115

115

115

[V] I mains

[A]

0,30

0,50

3,28

6,50

8,78

P mains

[VA] P mains

3,5

58

377

748

1010

< 20 A

[W]

1,5

40

275

585

815

P out

0

0

[W]

40

200

400

P v

[W]

1,5

40

235

385

415

Pmains[VA] =apparent power Umains*Imains, Pmains[W] =true power, Pout[W] =output power, Pv[W] =leakage power

Power supply on battery operation: operation voltage battery operation

Standby

0idling

Normal operation (-10 dB)

Nominal conditions battery initial current inrush

U

B

[V]

24

24

24

24

I

B

[A]

0,06

1,1

7,5

18

24 V DC, -10/+30 %

P i [VA]

1,5

26

180

432

< 3,9 A

Pout [W]

0

0

40

250

Pi[W] = input power UB*IB, Pout [W] = output power, Pv [W] = leakage power input characteristics:

nominal input level power output characteristics: nominal output power with mains supply nominal output voltage

with mains supply

with battery supply at 24 V DC nominal load impedance electronically balanced

775 mV = 0 dBu / 10 k ohms

balanced, floating

4 x 100 W (according to IEC 268-3)

100 V ( 70 V / 50 V / 20 V )

79 V ( 56 V / 40 V / 16 V )

100 ohms ( 50 / 25 / 4 ohms)

P v

[W]

1,5

26

140

182 minimal allowable output impedance:

100 V output

70 V output

50 V output

20 V output

100 W output power

100 Ohm // 250 nF

50 Ohm // 500 nF

25 Ohm // 1000 nF

4 Ohm // 6250 nF noise voltage (A-weighted)

THD at P

A NOMINAL amplification frequency response

200 W output power

50 V + 50 V output

—————

—————

—————

50 Ohm // 500 nF

—————

—————

—————

≤

-56 dBu

≤

1 %

60 Hz .. 20 kHz

35

distortion-limited response

(P

A NOMINAL

-3dB, k

Σ

= 1 %) crosstalk between two channels

MONITOR output characteristics:

nominal output voltage

nominal load impedance

amplification frequency response environmental temperature technical regulations:

This appliance is in accordance to the following regulations dimensions (W x H x D) installation depth without external connectors installation depth incl. external connectors weight color

Extension kits for the DPA 4411:

NRS 90206 pilot tone surveillance (for four amplifiers)

NRS 90207 ground fault surveillance (for four outputs)

NRS 90208 input transformer (per single input)

NRS 90227 monitor output transformer

60 Hz .. 5 kHz

≥

80dB at 1 kHz /

≥

60dB at 10 kHz electronically balanced

2 V = + 8.2 dBu

600 ohms

60 Hz .. 20 kHz

+5 °C .. +40 °C

EN 55103-1, EN 55103-2, EN 55022

EN 60065, EN 60555

19“ (483 mm) x 3HU (132 mm) x 345 mm

340 mm max. 400 mm

22.5 kg anthracite

Order No. 121 639

Order No. 121 640

Order No. 121 641

Order No. 121 679

14. Specifications For DPA 4411 Accessories

14.1 NRS 90206 pilot tone surveillance (for four amplifiers) pilot frequency fault recognition threshold fault message output

19 kHz ± 1%

≤

12 mV separate for each output; via

PROMATRIX Manager DPM 4000

14.2 NRS 90207 ground fault surveillance (for four outputs) input fault message output voltage strength fault recognition threshold loudspeaker line 20 V / 50V / 70V / 100V separate for each output; via

PROMATRIX Manager DPM 4000

1000 Veff

≤

50 k ohms

14.3 NRS 90208 input transformer (per single input) transmission range input impedance idling ratio primary winding resistance secondary winding resistance

20 Hz .. 20 kHz

≥

10 k ohms

1:1

1420 ohms at 20°C

1420 ohms at 20°C

14.4 NRS 90227 monitor output transformer transmission range nominal load impedance idling ratio primary winding resistance secondary winding resistance

40 Hz .. 20 kHz

≥

600 ohms

1:1

18 ohms at 20°C

18 ohms at 20°C

36