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OWNER’S MANUAL
POWER AMPLIFIER DPA 4411
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
• Integrated Remot
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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 a
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Indicators, Controls And Connections 1 LED meters with a range from -13 dB to 0 dB 2 CLIP indicators 3 TEST button for checking and reset function 4 STANDBY indicator 5 PROTECT indicator 6 GROUND FAULT indicator 7 READY indicator 8 Air inlets 9 POWER ON switch 10 AC MAINS INPUT connector 11 Mains fuse 12 VOLTAGE SELECTOR switch 13 REMOTE CONTROL connectors 14 STATUS indicator 15 INPUT connectors 1-4 16 ROUTING switch for INPUT 1-4 17 Device address label field 18 ADDRESS select
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Table of Contents Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Indicators, Controls And Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 1. Utilization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2. Installation Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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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. Install
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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
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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
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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 ar
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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 N
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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
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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 al
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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 P
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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, indicat
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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: (
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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 impeda
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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
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13. DPA 4411 Specifications Power supply on mains operation: operation voltage 115 V / 230 V~ AC, ±10 % mains frequency range 50 - 60 Hz safety class I mains operation Umains [V] Imains [A] Pmains [VA] Pmains [W] Pout [W] Pv [W] Standby 230 0,016 3,7 1,5 0 1,5 0idling 230 0,29 67 40 0 40 Normal operation (-10 dB) 230 1,64 377 275 40 235 Alarm (-3 dB) 230 3,25 748 585 200 385 Nominal conditions 230 4,39 1010 815 400 415 mains initial current inrush < 36 A mains operation Umains [V] I
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distortion-limited response (P -3dB, kΣ = 1 %) 60 Hz .. 5 kHz A NOMINAL crosstalk between two channels ≥ 80dB at 1 kHz / ≥ 60dB at 10 kHz MONITOR output characteristics: electronically balanced nominal output voltage 2 V = + 8.2 dBu nominal load impedance 600 ohms amplification frequency response 60 Hz .. 20 kHz environmental temperature +5 °C .. +40 °C technical regulations: This appliance is in accordance to the following regulations EN 55103-1, EN 55103-2, EN 55022 EN 60065, EN 60
