Dynacord 4120, 4140 User Manual

POWER AMPLIFIER DPA 4120 / DPA 4140 OWNER'S MANUAL

- 13dB

READY

GROUND

FAULT

CLIP

DPA 4140

0dB

T EST

STANDBY

PROT ECT

400 WATTS POWER AMPLIFIER

Performance Features

Power amplifier with 200 W or 400 W output power according to the IEC 283-3 standard within a 19“ - cabinet (3 HU) providing the following functions:

• supported are 115/230V AC mains as well as 24V DC emergency power source

• power amplifiers DPA 4120 providing 200 W or DPA 4140 providing 400 W output power, idling and short-circuit

protection

• output transformer for balanced, floating 100 V speaker networks of optionally 70 V, 50 V or 4 ohms for low-impedance operation

• optional input modules: standard operation INPUT MODULE with level control, electronically balanced input and MONITOR output with optional transformer or REMOTE MODULE for controlling and monitoring the PROMATRIX system, electronic level controls, electronically balanced input and MONITOR output with optional transformer

• integrated stand-by power supply

• mains POWER ON/OFF switch

• ground lift switch

• remotely controllable mains and battery operation with initial current inrush limiter

• power-on switching noise suppression

• status-LED indicators for operation (READY), STANDBY, thermal overload (PROTECT) and

occurrence of GROUND FAULT conditions at the power output

• fault message according to the IEC 849 standard

• TEST button to switch between system and average operation, respectively a RESET button to restart after the

occurrence of ground fault conditions

• LED level meter instrument with a display range of -13 dB to 0 dB and CLIP

• integrated relays for single call and obligatory reception

• active, temperature controlled ventilation

• pilot tone and ground fault surveillance module according to the DIN/VDE 0800 standard (optional)

Indicators, controls and connections

867

B20191817

1 2

A A A

POWER

10 1 1 12 13

T4A FOR 230V T8A FOR 115V

AC MAINS INPUT

115V /230V AC 50-60 Hz

CAU TION:

FOR CONTINUED PROTECTION AGAINST RISK O F FIRE

REPLACE WITH SAME TYPE AND VALUE FUSE INDICAT ED.

ATTENTION:

REMPLACER PAR UN FUSIBLE DE MEME TYPE

COMME INDIQ UE.

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

AVIS:

CAUTION

RISK OF ELECTRIC SHOCK

DO NO T OPEN

RISQ UE DE CHOC ELECTRIQUE. NE PAS OUVRIR.

DC INPUT 24V

CIRCUIT T O

CHASSIS SWITCH

GROUNDED

UNGRO UNDED

VOLTAGE

SELECTOR

115V 230V

NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

VO R ÖF F NEN DES G ER ÄTES NET Z STECKER Z IEHEN

400 WATT S PO WE R AM P L IFI ER

DPA 4140

121629

MADE IN GERMANY

ADDRESS

OUT PUT

VO LTAG E

POWER OUTPUT

1 2 3 4 5

DPA 4140

R EAD Y

G RO UN D

C LIP

0dB

-13dB

FAULT

TES T

STAN DBY

PR OTE CT

4 5

INPUT

LEVEL

REMOTE

CONTROL

THRU

100

90225

A A A

POWER

10 1 1 12 B

T4A FOR 230V T8A FOR 115V

AC MAINS INPUT

115V /230V AC 50-60 Hz

CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE

REPLACE WITH SAME TYPE AND VALUE F USE INDICATED.

REMPLACER PAR UN FUSIBLE DE MEME TYPEATTENTION:

COMME INDIQUE.

WARNING:

DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

AVIS:

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR.

DC INPUT 24V

CHASSIS SWITCH

CIRCUIT TO

GROUNDED UNGROUNDED

VOLTAGE

SELECTOR

115V 230V

1 level meter instrument 2 CLIP indicator 3 Test and Reset button TEST 4 STANDBY indicator 5 Fault indicator PROTECT 6 Fault indicator GROUND FAULT 7 Mode indicator READY 8 Ventilation louvres 9 Mains power switch POWER

NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.

VO R Ö FF NEN DES G ERÄTES NET Z STECKER Z IEHEN

INPUT

THRU

REMOTE

CONTROL

ADDRESS

OUT

STATUS

90222

121629

O UT PUT VO LTAGE

POWER OUTPUT

1 2 3 4 5

DPA 4140

M ADE IN GERMANY

AD DRESS

10 Mains power connector AC MAINS INPUT 11 Mains fuse FUSE 12 Mains VOLTAGE SELECTOR 13 Input LEVEL control 14 INPUT socket 15 THRU socket 16 REMOTE CONTROL connector 17 POWER OUTPUT 18 Ventilation louvres

19 CIRCUIT ⊥ TO CHASSIS SWITCH 20 DC INPUT 24V = (battery) 21 IDENT ADDRESS switch 22 REMOTE CONTROL connectors 23 STATUS indicator A locking screws power supply printed board

B locking screws INPUT MODULE

Contents

Performance Features .........................................................................................................................23

Indicators, controls and connections .................................................................................................... 25

1. Utilization ......................................................................................................................................... 27

2. Installation ........................................................................................................................................27

3. Before the first operation .....................................................................................................................27

3.1 Mains operation ..........................................................................................................................27

3.2 Battery operation 24V DC.............................................................................................................28

4. INPUT...............................................................................................................................................28

5. Outputs.............................................................................................................................................29

5.1 POWER OUTPUT........................................................................................................................ 29

5.2 POWER OUTPUT for 100V (70V or 50V) loudspeaker systems........................................................ 29

5.3 SINGLE CALL and obligatory reception relays OVERRIDE BYPASS ................................................29

5.4 POWER OUTPUT for low impedance loudspeaker systems .............................................................29

5.5 MONITOR output ......................................................................................................................... 30

5.6 REMOTE CONTROL connector (only NRS 90225) ..........................................................................30

6. Indicators .......................................................................................................................................... 30

6.1 STANDBY indicator...................................................................................................................... 30

6.2 READY indicator.......................................................................................................................... 30

6.3 PROTECT indicator ......................................................................................................................30

6.4 GROUND FAULT indicator ............................................................................................................30

6.5 Aussteuerungskontrolle und CLIP-Anzeige.....................................................................................31

7. Switching the output voltage................................................................................................................31

8. Enhanced application field ...................................................................................................................32

8.1 General input module NRS 90225 ..................................................................................................32

8.2 Remote module NRS 90222 ..........................................................................................................32

8.3 NRS 90208 input transformer for the floating, balanced input ............................................................33

8.4 NRS 90227 output transformer for the floating, balanced monitor output ............................................ 33

8.5 NRS 90224 pilot tone and ground fault surveillance.......................................................................... 35

8.5.1 Pilot tone surveillance.......................................................................................................... 35

8.5.2 Ground fault surveillance...................................................................................................... 35

9. 19"-case and 19“-rack shelf system installation .....................................................................................38

10. Ground lift switch CIRCUIT ⊥TO CHASSIS SWITCH..............................................................................38

11. Fuses................................................................................................................................................ 38

11.1 Fuses in the DPA....................................................................................................................... 38

11.2 Fuses in the DPA....................................................................................................................... 38

12. Power amplifier specifications..............................................................................................................42

12.1 DPA 4120 power amplifier 200 W................................................................................................. 42

12.2 DPA 4140 power amplifier 400 W................................................................................................. 43

13. Extension specifications ..................................................................................................................... 44

13.1 NRS 90225 general input module .................................................................................................44

13.2 NRS 90222 remote module .........................................................................................................44

13.3 NRS 90208 input transformer for floating, balanced input................................................................44

13.4 NRS 90227 output transformer for floating, balanced monitor output ................................................44

13.5 NRS 90224 pilot tone and ground fault surveillance........................................................................ 44

14. Block diagrams..................................................................................................................................67

14.1 Power amplifiers DPA 4120 / DPA 4140........................................................................................67

14.2 NRS 90225 general input module .................................................................................................68

14.3 NRS 90222 remote module .........................................................................................................69

14.4 NRS 90224 pilot tone and ground fault surveillance........................................................................ 70

15. Warranty ...........................................................................................................................................72

1. Utilization

The amplifiers DPA 4120 and DPA 4140 are specially designed for the power-consistent and reliable operation of PAsystems. The DPA 4120 and DPA 4140 are intended to be used in company intercom, alarm and background music transmission installations, offices and commercial areas, congregation and sport centers, schools, churches, hotels, hospitals, shopping malls and super markets, cruise ships, and other similar applications.

2. Installation

When installing the amplifiers, it is important to assure that for ventilation reasons the front-to-rear air circulation is guaranteed (for details on 19"-case or 19“-rack shelf installation please refer to paragraph 9).

To maintain EMC it is necessary that all input, output, and control lines – except for the power cords – are shielded. Within metal housings or closed rack shelf systems, unshielded output and control cabling is allowable. Shielding is accomplished by connecting the individual cable screens to the enclosure or rack shelf ground potential.

The amplifier has to be protected from:

- water drops or splashes

- direct sunlight

- high ambient temperatures and the direct radiation of heat sources

- high humidity and moisture

- heavy dust

- massive vibrations

Moving the amplifier from a cold into a warm environment can result in the occurrence of condensation on inner parts. Operating the appliance is only permissible after it has accommodated to the altered temperature (approximately after one hour).

Should it happen that foreign solid parts or liquids inadvertently intrude the enclosure, unplug the device from the power source and have it checked by a DYNACORD service center, before using it again.

Cleaning the appliance should not be performed using chemical solvents or sprays, as this might damage the finish and moreover could cause hazard fire.

3. Before the first operation

These power amplifiers are designed to be operated with different input modules. The general input module NRS 90225 is meant for all conventional applications. It allows to remotely start the amplifiers via control lines, monitor their operation by use of the incorporated fault relay, and monitor the transmitted audio signals through the monitor output. Using the remote control module NRS 90222, the amplifiers are connected to the PROMATRIX manager DPM 4000 via RS-485 remote interface providing complete remote operation and surveillance. The desired input module has to be inserted into the module shaft on the rear of the power amplifier. It has to be tightened using the two locking screws (B) (refer also to the paragraphs 8.1 and 8.2).

3.1 Mains operation

For normal AC mains operation, the included mains cord has to be connected to a 230V or 115V 50/60Hz wall outlet. On the appliance itself, the cord has to be connected to the 3-pole mains socket (10).

Caution The appliance is factory preset to 230V AC. Switching to 115V AC is accomplished using the voltage

selector (12).

DPA 4120: For 115V AC operation, the mains fuse (11) has to be replaced by a slow blowing 4 ampere type , labeled "T4A" (see also paragraph 11.1).

DPA 4140: For 115V AC operation, the mains fuse (11) has to be replaced by a slow blowing 8 ampere type , labeled "T8A" (see also paragraph 11.2).

If the appliance is correctly connected and mains is present the green STANDBY indicator (4) will light. To remotely start the amplifier when it is being operated on the mains, it is necessary to interconnect the contacts 3 - POWER REMOTE and 2 - GROUND STANDBY on the pin terminal strip REMOTE CONTROL (16) (see also paragraph 5.6).

The main power switch POWER (9) on the rear of the appliance is meant for service and maintenance purposes. This allows bridging the mains switching relay, which provides the possibility to operate the amplifier without remote start.

Note The main power switch POWER (9) on the appliance's rear is only meant for maintenance . Remotely

switching off the device is not possible when the POWER switch is engaged.

Both amplifiers, the DPA 4120 and the DPA 4140, employ power-on switching delays of approximately 3 sec. After this time, the green READY indicator lights and the READY fault message relay picks up when no error is being detected (see also paragraph 6.2).

3.2 Battery operation 24V DC

The amplifiers, DPA 4120 and DPA 4140, use the mains or alternatively an external 24V battery as power source. Switching to battery is performed via integrated relays.

The battery has to be connected on the rear of the amplifiers (20) using insulated 6.3x0.8 mm AMP flat plug connectors. The amplifiers are protected against polarity-mismatch. Each, the positive and negative conductors are internally protected by fuses, located on the printed board assembly 85270 (DPA 4120) respectively 85268 (DPA

4140) (see also paragraph 11, figure 10 and 11).

The cable used for battery connection has to be at least 1.5 mm2 in diameter (DPA 4120) respectively 2.5 mm2 (DPA

4140). Using these diameters, the cable length for the one way distance should not exceed 4.0 m (max. voltage drop

<1V). Caution The DPA 4120 and DPA 4140 are to be operat ed only using ungrounded batteries or batteries with

grounded negative pole. Operation with grounded positive pole is not permissible.

4. INPUT

The electronically balanced INPUT (14) providing a sensitivity of 775mV = 0dBu is meant for the connection of control amplifiers. In case it is intended to supply several power amplifiers with identical input signals, these signals can be taken from the THRU connector (15) (see also figure 1 and 2). The input is prepared to be retrofitted with a input transformer. In case a floating input is needed, it is necessary to install the optional extension NRS 90208 (see also paragraph 8.3). On the general input module NRS 90225 the input level is set with the level control (13). For the remote control module NRS 90222 the input level is determined by the setting of the internal electronic level control of the PROMATRIX manager DPM 4000 (please also refer to the PROMATRIX handbook).

figure 1 connections of the input sockets

figure 2 LF cable for coupling two amplifiers DPA 41xx

5. Outputs

5.1 POWER OUTPUT

The power output is balanced and off-ground potential. The output is factory-configured for the connection of 100V loudspeaker systems. Connection has to be performed by inserting the supplied 5-pole plug into the power output socket (17). Switching the output voltage to 70V, 50V or to low impedance operation (4 ohms) is possible using the plug-in bridge B411 on the printed board assembly 84187 (DPA 4120) respectively 84175 (DPA 4140) (see also paragraph 7).

figure 3 connection of the power output

5.2 POWER OUTPUT for 100V (70V or 50V) loudspeaker systems

If the distance between the amplifier and the loudspeakers exceeds 50 m, it is recommended to operate the speaker systems using 100V matching transformers, to reduce line attenuation. This additionally offers a simple way of distributing the output power capacity. In this way it is possible to connect a maximum of as many loudspeaker systems as it takes until the total power consumption of the entire speaker network equals the power output capacity

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