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Pulsar DSOS24V-PRA User Manual

Firefighter's microphone power supply for voice alarm systems 24v praesensa
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24
1438
Power supply unit for fire systems used DSOS24V-PRA type
Declared performance: Fire safety.
Certificate of constancy of performance: 1438-CPR-1019
Certificate of approval: 5402/2024
Compliant: EN 54-4:1997+ AC:1999 + A1:2002 + A2:2006
USER MANUAL
EN
Edition: 1 from 09.07.2023
Supersedes edition: ------
DSOS24V-PRA
v.1.0
FIREFIGHTER'S MICROPHONE POWER SUPPLY
FOR VOICE ALARM SYSTEMS 24V PRAESENSA

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Summary of Contents for Pulsar DSOS24V-PRA

  • Page 1 1438 Power supply unit for fire systems used DSOS24V-PRA type Declared performance: Fire safety. Certificate of constancy of performance: 1438-CPR-1019 Certificate of approval: 5402/2024 Compliant: EN 54-4:1997+ AC:1999 + A1:2002 + A2:2006 USER MANUAL Edition: 1 from 09.07.2023 Supersedes edition: ------ DSOS24V-PRA v.1.0...
  • Page 2 DSOS24V-PRA GENERAL SAFETY RULES Before installation, read the instruction manual to avoid errors that can damage the device and give you an electric shock.  Before installation, cut off the voltage in the 230 V power-supply circuit.  To switch power off, use an external switch, in which the distance between the contacts of all poles in the disconnection state is not less than 3 mm.

  • Page 3: Table Of Contents

    DSOS24V-PRA TABLE OF CONTENTS 1. FEATURES............................. 4 2. FUNCTIONAL REQUIREMENTS OF THE PSU................5 3. STANDARD CONFIGURATION......................5 4. TECHNICAL DESCRIPTION......................6 4.1. G ................................ 6 ENERAL DESCRIPTION 4.2. B .................................. 6 LOCK DIAGRAM 4.3.

  • Page 4: Features

    DSOS24V-PRA 1. Features.  Conformity with  Battery overcharge protection  Battery output protection against short circuit and EN 54-4:1997+AC:1999+A1:2002+A2:2006, and pt. 12.2 according to Decree of the Ministry of Internal reverse connection  Output voltage control Affairs and Administration of 20.06.2007 (Journal of ...

  • Page 5: Functional Requirements Of The Psu

    DSOS24V-PRA 2. Functional requirements of the PSU. The buffer power supply for fire alarm systems has been designed in accordance with the following standards: - EN 54-4:1997+AC:1999+A1:2002+A2:2006 fire detection and fire alarm systems. - pt. 12.2 according to Decree of the Ministry of Internal Affairs and Administration of 20.06.2007 (Journal of Laws No.

  • Page 6: Technical Description

    4. Technical description. 4.1. General description. DSOS24V-PRA is designed for uninterruptible power supply of call stations (firefighter’s microphone) used in DSO (Voice Alarm Systems) requiring stabilized voltage of 48 V DC (-5%/+5%). In case of lack of main power, battery back-up is activated immediately. Power supply unit is placed in metal enclosure (color red RAL 3001) with space for 2x 17Ah/12V batteries.

  • Page 7: Description Of Psu Components And Connectors

    DSOS24V-PRA 4.3. Description of PSU components and connectors. Table 2. Description of components and connectors. Element Description LEDs - optical indication: – AC voltage – output voltage 24 V DC FAILURE – common failure Microphone hanging point (mounting plate included with PRA-CSLW station) Space for PRA-CSLW microphone station Space for PRA-CSE extensions, max.

  • Page 8: Installation

    DSOS24V-PRA 5. Installation. 5.1. Requirements. Buffer power supply is designed to be installed only by qualified installer with necessary permits and authorisations (required in installation country) to connect (interfere) with the 230 V mains supply. Because the power supply is designed for the continuous operation and is not equipped with ON/OFF switch, the power supply circuit should have the appropriate overload protection.

  • Page 9: Installation Procedure

    DSOS24V-PRA 5.2. Installation procedure. CAUTION Before installation, cut off voltage in 230 V power-supply circuit. To switch power off, use an external switch, in which distance between contacts of all poles in disconnection state is not less than 3mm.

  • Page 10: Procedure For Checking Power Supply

    DSOS24V-PRA 5.3. Procedure for checking power supply. Check indication displayed on front panel of power supply unit: a) 230 V AC LED should remain lit to indicate presence of mains supply voltage. b) LED DC should remain lit to indicate presence of supply voltage.

  • Page 11: Functions

    DSOS24V-PRA 6. Functions. 6.1. Optical indication. The power supply is equipped with three LEDs on the front panel: AC voltage  on – the PSU is supplied with 230 V AC  off – no 230V AC supply Output voltage 48 V DC ...

  • Page 12: Common Failure Input Exti

    DSOS24V-PRA Fig. 10. Technical output ALARM. CAUTION! The figure set of contacts shows a potential-free status of relay, which corresponds to power supply failur. 6.3 Common failure input EXTi. EXT IN (external input) technical input indicating common failure is intended for additional, external devices that generate failure signal.

  • Page 13: Reserve Power Supply Circuit

    DSOS24V-PRA 7. Reserve power supply circuit. PSU is fitted with intelligent circuits: battery charging circuit with function of accelerated charging and battery control, which main task is to monitor condition of batteries and connections in circuit. If controller detects a power failure in battery circuit, appropriate indication and change of ALARM technical output.

  • Page 14: Standby Time

    DSOS24V-PRA Fig. 12. Mounting of temperature sensor. Nominal battery operating temperature recommended by many manufacturers is 25°C. Working at elevated temperatures will significantly shorten battery lifetime. Service life is reduced by half for each sustained temperature rise of 8°C above nominal temperature. This means that battery lifespan, when operated at 33°C, can be decreased by 50%!

  • Page 15: Specifications

    DSOS24V-PRA 8. Specifications. Table 5. Electrical parameters. Supply voltage ~230 V Current consumption 0,34 A @230 V AC Power frequency 50 Hz Output power PSU 14,4 W Efficiency Rated voltage (-5%/+5%) 48 V DC Output current 300 mA 300 mΩ...

  • Page 16: Maintenance

    CAUTION! The power supply unit is adapted for cooperation with the sealed lead-acid batteries (SLA). After the operation period they must not be thrown but recycled according to the applicable law. Pulsar sp. j. Siedlec 150, 32-744 Łapczyca, Poland Tel.

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