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Bosch Plena LBB1930/20 Installation And Operation Manual

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Plena Power Amplifiers
LBB1930/20, LBB1935/20, LBB1938/20, LBB1938/70
en
Installation and Operation manual

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  Summary of Contents for Bosch Plena LBB1930/20

  • Page 1 Plena Power Amplifiers LBB1930/20, LBB1935/20, LBB1938/20, LBB1938/70 Installation and Operation manual...
  • Page 3: Table Of Contents

    Battery voltage 10.1.3 Rated power 10.2 Performance 10.2.1 Signal performance 10.2.2 Signal-to-Noise Ratios 10.2.3 Line inputs 10.2.4 Loudspeaker outputs 10.2.5 Power consumption 10.3 Mechanical specifications 10.4 Environmental conditions Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 4: Safety

    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. 2014.01 | V1.1 | LBB193x/x0 Installation and Operation manual Bosch Security Systems B.V.
  • Page 5: About This Manual

    The equipment or the property can be seriously damaged, or persons can be severely injured if the alert is not observed. Danger! Not observing the alert can lead to severe injuries or death. Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 6: Conversion Tables

    For information on getting permission for reprints and excerpts, contact Bosch Security Systems B.V.. The content and illustrations are subject to change without prior notice.
  • Page 7: System Overview

    The amplifiers have overload and short‑circuit protection. A temperature controlled fan and overheat protection gives high reliability. Battery operation with automatic switchover from the mains supply is available. Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 8: Installation

    - Ensure sufficient ventilation and enough room, about 10cm / 4” behind the unit for cables and connections. - Use the included Bosch 19” mounting brackets (LBC 1901/00) x2. - Remove the tabletop feet from the bottom of the unit.
  • Page 9: Connection And Indicators

    0V- Mute Priority Controlled Output 24V DC In S lave Input 100V 100V 100V 1 00V Input Input Priority Only No Priority Figure 5.2: LBB 1930/20 LBB 1935/20 Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 10 15. Battery detection 16. Fault relay output 17. Pilot-Tone detection 18. 100 V slave input terminals 19. Input 2 enable control terminals 20. Input 1 priority control terminals 2014.01 | V1.1 | LBB193x/x0 Installation and Operation manual Bosch Security Systems B.V.
  • Page 11: Internal Setting

    This selection does not affect the output voltage of the loudspeaker direct outputs. F701 100V F702 Figure 5.4: Internal fuse setting LBB 1930/20, LBB 1935/20, LBB 1938/x0 See also – Rear panel connectors and switches, page 9 Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 12: External Connections

    Wa rnin P owe T his app arat r : 50V us mus T 1.0A t be L 250 eart hed Figure 6.2: Line input and loop‑through 2014.01 | V1.1 | LBB193x/x0 Installation and Operation manual Bosch Security Systems B.V.
  • Page 13: 100V Slave Input

    (70V). Connect the loudspeakers in parallel and check the loudspeaker polarity for in- phase connection. The summed loudspeaker power should not exceed the rated amplifier power. Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 14: Low Impedance Loudspeakers

    D ire ct O utput 100V Priority Controlled Output 24V DCIn 100V 100V Priority Only No Priority Priority Only No Priority Figure 6.4: Priority input and control terminals 2014.01 | V1.1 | LBB193x/x0 Installation and Operation manual Bosch Security Systems B.V.
  • Page 15: Priority Controlled Loudspeaker

    Loudspeakers connected to the No Priority output will receive all audio signals, such as music, but no signals with priority, like calls. Power Use the mains lead to connect the amplifier to the power supply. Figure 6.5: Mains lead Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 16: Supervision

    (falls below the threshold of -20%), and the back‑up power supply takes over, the fault relay moves to the NOK position. A mains fault indication shows on the front panel and a fault state is given by the mains fault relay. 2014.01 | V1.1 | LBB193x/x0 Installation and Operation manual Bosch Security Systems B.V.
  • Page 17: Operation

    Input fault relay switches over if the power stage is switched “OFF” by the overheat protection circuit. The Battery operation indicator (3) lights up if the mains power supply is failing and the back‑up battery is in use. Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 18: Connecting The Priority Input And Using The Control Terminals

    100V 1 00V 100V 1 00V Input Input Priority Only No Priority Input Input Priority Only No Priority Figure 8.3: LBB1925/10 and power amplifier control terminals example 2014.01 | V1.1 | LBB193x/x0 Installation and Operation manual Bosch Security Systems B.V.
  • Page 19: Maintenance

    The ground (Protective Earth) connection of the system components. Warning! Dangerous mains voltages are present inside the units. Disconnect the main power supply before doing any maintenance tasks. Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 20: Technical Data

    50 Hz - 20 kHz (+1/-3 dB @ -10 dB ref. rated output) Distortion <1% @ rated output, 1 kHz 10.2.2 Signal-to-Noise Ratios LBB 1930/20 > 80 dB LBB 1935/20 > 85 dB LBB 1938/x0 > 90 dB 2014.01 | V1.1 | LBB193x/x0 Installation and Operation manual Bosch Security Systems B.V.
  • Page 21: Line Inputs

    44 V / 240 W LBB 1938/x0 62 V / 480 W Power reduction@24 V battery operations Reference rated power -1 dB (LBB 1935/20) -2 dB (LBB 1930/20 LBB 1938/x0) Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 22: Power Consumption

    - 3 dB Watt - 6 dB 244** 508** Watt Watt Idle Watt Backup power (24VDC) Full power - 3 dB - 6 dB 18** Idle Full power Watt 2014.01 | V1.1 | LBB193x/x0 Installation and Operation manual Bosch Security Systems B.V.
  • Page 23 Watt Idle Watt * Output limited to -3dB ** Corresponds to pink noise and voice on full power *** Output limited for sine wave signal to -3dB Bosch Security Systems B.V. Installation and Operation manual 2014.01 | V1.1 | LBB193x/x0...
  • Page 24: Mechanical Specifications

    Relative humidity < 95% EMC emission According to EN55103‑1 EMC immunity According to EN55103‑2 Acoustic noise level of fan < 45 dB SPL @ 1m at maximum speed 2014.01 | V1.1 | LBB193x/x0 Installation and Operation manual Bosch Security Systems B.V.
  • Page 26 Bosch Security Systems B.V. Torenallee 49 5617 BA Eindhoven The Netherlands www.boschsecurity.com © Bosch Security Systems B.V., 2014...

This manual is also suitable for:

Plena lbb1935/20Plena lbb1938/70Plena lbb1938/20