Dynacord DPA 4120 NRS 90224 pilot tone & ground fault surveillance, Pilot tone surveillance

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8.5NRS 90224 pilot tone & ground fault surveillance

The extension NRS 90224 is meant for insertion. It includes a 19 kHz tone generator and a selective 19 kHz receiver with evaluation stage for pilot tone surveillance. Also incorporated is a monitoring circuit with fault storage and display driver, to guard the cable network connected to the output.

8.5.1 Pilot tone surveillance:

Integration of the extension NRS 90224 provides continuous self-monitoring of the amplifier. This gets accomplished in the way that an extremely low-level 19 kHz pilot tone signal is introduced to the signal path following the input level control LEVEL. After passing the amplifier stages, the pilot tone signal is filtered out at the output and the result is evaluated. If the measured signal declines the pilot tone's predetermined threshold at the output or is not present at all, the READY indicator (7) dims and the READY fault message relay drops. When using the INPUT MODULE NRS 90225, the fault message is output as collective fault message with the floating contact of the READY fault message relay via the REMOTE CONTROL connector (16). When using the REMOTE MODULE NRS 90222, error occurrence is monitored and output by the PROMATRIX manager DPM 4000 (for further details, please refer to the PROMATRIX handbook).

8.5.2 Ground fault surveillance:

When installing and operating 100V-loudspeaker networks, compliance to the VDE regulation DIN VDE 0800 is mandatory. Especially, if 100V-loudspeaker networks are included in alarm system applications, all security standards have to be in accordance to the security class 3 standard.

When off-ground potential loudspeaker cable networks are employed we recommend insulation-monitoring using the ground fault surveillance module NRS 90224. Error recognition: An occurring ground fault either signals that one of the cables is damaged - which most likely point towards a total line interruption in the near future - or that connections have been carried out erroneously which may lead to malfunctioning of the entire system. The fault message GROUND FAULT (6) is also maintained with very short (>5 sec) ground faults, as long as the amplifier is powered-on or a loaded battery is connected. The fault message is displayed via the red GROUND FAULT indicator (6). In case of an inserted INPUT MODULE NRS 90225, it is also outputted as collective fault message with the floating contact of the READY fault message relay via the REMOTE CONTROL connector (16). When using the REMOTE MODULE NRS 90222, error occurrence is monitored and output by the PROMATRIX manager DPM 4000 (for further details, please refer to the PROMATRIX handbook).

The installation has to be performed as follows (see figure 8 and/or figure 9):

Caution Before opening the appliance, make sure to disconnect the mains and/or battery power source!

-To open the appliance, the top panel has to be removed.

-The extension kit NRS 90224 has to be inserted with its component side to the left (from the front view) until it clicks in place.

-Re-install the top plate of the enclosure.

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Contents Leistungsmerkmale Power Amplifier DPA 4120 / DPA+7,*6,&+5+,76+,1,6 DPA Anzeigen, Bedienungselemente und AnschlüsseInhaltsverzeichnis Vor der Inbetriebnahme InstallationshinweiseVerwendung Der Verstärker ist zu schützen vorEingang Input Batteriebetrieb 24V DCAusgänge Leistungsausgang Power Output Anzeigen STANDBY-Anzeige Leistungsausgang Power Output für niederohmige LautsprecherSteueranschluß Remote Control nur NRS Kontrollausgang MonitorAussteuerungskontrolle und CLIP-Anzeige Ground Fault AnzeigeProtect Anzeige Remote Modul NRS Der Einbau ist wie folgt vorzunehmen siehe Bild 6 bzw. Bild Input Transformer NRS Output Transformer NRS Der Einbau ist wie folgt vorzunehmen siehe Bild 8 bzw. Bild Pilotton & Erdschluß Überwachung NRSPilotton-Überwachung Erdschluß-ÜberwachungNRS 90 406 S 411 Prüfung der Funktion Pilotton-Überwachung Sicherungen Sicherungen in DPA Groundlift Schalter Circuit a to Chassis SwitchPrüfung der Funktion Erdschluß-Überwachung Einbau in 19-Gehäuse oder 19-Gestellschränke503 F Page Page Eigenschaften des Monitor-Ausgangs BatteriebetriebEigenschaften des Eingangs Eigenschaften des Leistungs-AusgangsNachrüstsätze für DPA 4120 und DPA Erdschluß Überwachung Performance Features 03257$176$7,16758&7,216 12 a Indicators, controls and connectionsContents Before the first operation InstallationUtilization Amplifier has to be protected fromInput Battery operation 24V DCSingle Call and obligatory reception relays Override Bypass Power Output for 100V 70V or 50V loudspeaker systemsPower Output for low impedance loudspeaker systems OutputsProtect indicator Remote Control connector only NRSIndicators Standby indicator Ready indicatorLevel meter and Clip indicator Remote module NRS Enhanced application field Standard input module NRSNRS 90208 input transformer for the floating, balanced input Input Transformer NRS Output Transformer NRS Pilot tone surveillance NRS 90224 pilot tone & ground fault surveillanceGround fault surveillance NRS 90 406 S 411 Checking the pilot tone surveillance function Fuses Fuses in the DPA Checking the ground fault surveillance functionCase and 19-rack-shelf system installation Ground lift switch Circuit a to Chassis Switch503 F 503 F 601 602 Features of the input nominal input level Battery operationExtension kits for the DPA 4120 and DPA DPA 4140 power amplifier 400 W power supply Mains operationNRS 90208 input transformer for floating, balanced input Caractéristiques techniques Amplificateur DE Puissance DPA 4120 / DPA16758&7,2166e&85,7e,03257$176 Témoins, contrôles et connexions NRS 90225 module dentrée général Fonctionnement sur le secteur UtilisationLamplificateur doit être protégé contre Avant la première utilisationInput Entrée Fonctionnement sur batterie 24V DCSorties Câblage LF pour le couplage de deux amplificateurs DPATémoin Ready Connecteur Remote Control NRS 90225 uniquementSortie Monitor Témoins Témoin StandbyVumètre et témoin Clip Témoin Ground FaultChamps dapplications avancées Module dentrée standard NRS Module de télécommande NRSPage Input Transformer NRS Output Transformer NRS Surveillance de défaut de masse Surveillance de la fréquence piloteNRS 90 406 S 411 NRS 90 406 S 411 Fusibles Fusibles du DPA Installation en rack 19 et en armoire rackCommutateur de mise à la masse Circuit a to Chassis Switch 503 F 503 F 601 602 Caractéristiques de la sortie Monitor Fonctionnement sur batterieCaractéristiques de lentrée Caractéristiques de la sortie de puissanceKits dextension pour les DPA 4120 et DPA Surveillance du défaut de masse entrée ligne haut-parleur Page Blockdiagram Page Page Page Bosch Communications Systems
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DPA 4120, DPA 4140 specifications

The Dynacord DPA 4120 and DPA 4140 are powerful amplifier solutions designed for professional audio applications. These models are ideal for live sound reinforcement, permanent installations, and various audio distribution requirements.

Both DPA 4120 and DPA 4140 are part of the Dynacord DPA series, which is renowned for delivering high-quality sound and reliability in demanding environments. The DPA 4120 provides a robust 1200 watts of power per channel at 4 ohms, while the DPA 4140 ups the ante with an impressive 1400 watts per channel at the same impedance, making them suitable for driving a wide range of speaker systems.

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In summary, the Dynacord DPA 4120 and DPA 4140 offer exceptional power, sound quality, and advanced features, making them excellent choices for audio professionals seeking reliable and powerful amplification solutions. Their combination of performance, durability, and versatility serves to meet the needs of various professional audio applications, solidifying their place in the competitive landscape of audio amplifiers.
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