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Bosch PLENA LBB1938/30 Installation And Operation Manual

Bosch PLENA LBB1938/30 Installation And Operation Manual

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PLENA power amplifiers
LBB1930/20| LBB1935/20| LBB1938/30| LBB1938/70
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Installation and operation manual

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Summary of Contents for Bosch PLENA LBB1938/30

  • Page 1 PLENA power amplifiers LBB1930/20| LBB1935/20| LBB1938/30| LBB1938/70 Installation and operation manual...
  • Page 3 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 2018.11 | V1.2 | LBB193x/x0...
  • Page 4 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. 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 5 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 2018.11 | V1.2 | LBB193x/x0...
  • Page 6 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 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 2018.11 | V1.2 | LBB193x/x0...
  • Page 8 - Ensure sufficient ventilation and enough room, about 10cm / 4” behind the unit for cables and connections. - Use the included Bosch 19” mounting brackets. - Remove the tabletop feet from the bottom of the unit. 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 9 2..24V- Enable 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: LBB1930/20 and LBB1935/20 Bosch Security Systems B.V. Installation and operation manual 2018.11 | V1.2 | 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 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 11 This selection does not affect the output voltage of the loudspeaker direct outputs. F701 100V F702 Figure 5.5: Internal fuse settings LBB1930/20, LBB1935/20, LBB1938/x0 See also – Rear panel connectors and switches, page 9 Bosch Security Systems B.V. Installation and operation manual 2018.11 | V1.2 | LBB193x/x0...
  • Page 12 Wa rnin inpu t P owe T his r : 50V app arat T 1.0A us mus L 250 t be eart hed Figure 6.2: Line input and loop‑through 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 13 (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 2018.11 | V1.2 | LBB193x/x0...
  • Page 14 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 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 15 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 2018.11 | V1.2 | LBB193x/x0...
  • Page 16 (falls below the threshold of -20%), and the back‑up power supply takes over, the fault relay will switch over. A mains fault indication shows on the front panel and a fault state is given by the mains fault relay. 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 17 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 backup battery is in use. Bosch Security Systems B.V. Installation and operation manual 2018.11 | V1.2 | LBB193x/x0...
  • Page 18 100V 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 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 19 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 2018.11 | V1.2 | LBB193x/x0...
  • Page 20 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 LBB1930/20 > 80 dB LBB1935/20 > 85 dB LBB1938/x0 > 90 dB 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 21 LBB1935/20 44 V / 240 W LBB1938/x0 62 V / 480 W Power reduction@24 V battery operations Reference rated power -1 dB (LBB1935/20) -2 dB (LBB1930/20, LBB1938/x0) Bosch Security Systems B.V. Installation and operation manual 2018.11 | V1.2 | LBB193x/x0...
  • Page 22 -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 -3 dB Watt 2018.11 | V1.2 | 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 2018.11 | V1.2 | LBB193x/x0...
  • Page 24 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 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 25 PLENA power amplifiers Technical data | Bosch Security Systems B.V. Installation and operation manual 2018.11 | V1.2 | LBB193x/x0...
  • Page 26 | Technical data PLENA power amplifiers 2018.11 | V1.2 | LBB193x/x0 Installation and operation manual Bosch Security Systems B.V.
  • Page 28 Bosch Security Systems B.V. Torenallee 49 5617 BA Eindhoven Netherlands www.boschsecurity.com © Bosch Security Systems B.V., 2019...

This manual is also suitable for:

Plena lbb1935/20Plena lbb1930/20Plena lbb1938/70