Gromax Technologies Private Limited
Gromax Technologies Private Limited
Shakarpur Khas, New Delhi, Delhi

BOSCH Plena Voice Alarm System

The Plena Voice Alarm System is a public address and voice alarm system in which all the necessary features for compliance to evacuation standards such as IEC60849, NEN2575, BS5839/8 and EN54-16 are integrated.

BOSCH LBB-1990, Plena Voice Alarm Controller

BOSCH LBB-1990, Plena Voice Alarm Controller
  • BOSCH LBB-1990, Plena Voice Alarm Controller
Get Best Quote
Approx. Price: Rs 1.2 Lakh / PieceGet Latest Price

Product Details:

Mixer TypePowered Mixer
Packaging TypeCarton
Model NumberLBB1990
Voltage230/115 VAC,+-15%,50/60 Hz
Operating temperature-10 deg C to +55 deg C (14 deg F to +131 deg F)
Storage temperature-40 deg C to +70 deg C (-40 deg F to +158 deg F)
Current inrush8 A
Relative humidity95%
Acoustic noise level of fan48 dB SPL at 1 m (max output)
Max power consumption600 VA
Output power (rms/maximum)240 W / 360 W
Power reduction on backup power-1 dB
Frequency response60 Hz to 18 kHz (+1/-3 dB at -10 dB ref. rated output)
Sensitivity1 mV (mic),1 V (line)
Connector TypeMC 1,5/14-ST-3,5
Speech filter-3 dB at 315 Hz,high-pass,6 dB/oct
Phantom power supply12 V (mic mode only)
Rating250 V,7A,voltage free
Max power550 W
Memory capacity16 MB Flash ROM
Dimensions144 x 430 x 370 mm (19" wide,3U high)
WeightApprox. 21.17 kg
Mounting19" rack

The Plena Voice Alarm Controller unit is the heart of the voice alarm system. It is the basis of the Plena Voice Alarm System, and has all the essential functionality for compliance with the EN 54 16 and EN 60849 standards, including full system supervision, loudspeaker line impedance supervision, a supervised emergency microphone on the front panel and a supervised message manager.

The messages can be merged to allow even more flexible use of pre-recorded announcements and evacuation messages. The controller can be used as a stand-alone system with up to six zones, or expanded to up to 120 zones using additional six-zone routers. Up to eight call stations can be connected. Interconnections are made using standard RJ45 connectors and shielded CAT-5 cable.

A built-in 240 W amplifier provides the power for the emergency call channel and BGM. Additional Plena Amplifiers can be added to provide two-channel operation. All amplifiers are supervised. The audio output uses standard analog audio 100 V line switching for full compatibility with the Plena family of public address equipment and Bosch EVAC-compliant loudspeakers. The system is configured using DIP switches for basic functionality and a PC for more advanced functions.

The controller has two BGM source inputs and a mic/ line input with configurable priority, speech filter, phantom power and selectable VOX activation. A total of 16 priority levels can be specified for microphone, call stations and trigger inputs for optimum system flexibility.

The powerful 240 W output section has six transformer-isolated 100 V constant-voltage outputs for driving 100 V loudspeakers in six separate zones. The 100 V-technique reduces line losses on longer distances and provides easy parallel connection of multiple loudspeakers. All zones may be individually selected from the front panel, and the BGM output level in each zone can be individually set in six steps. The controller supports A/B wiring.

Configuration software is provided on the CD included with the unit. The CD also includes many useful programs, such as MP3-ripping software, a sample- rate converter, various audio and visual tools, and free, MP3-coded music.

The amplifier output is also available as a separate output on 100 V and 70 V. A separate 100 V call-only output provides addressing for an area where BGM is not required but where priority announcements are. Six configurable volume-override output contacts are available for overriding local volume controls during priority calls. Both four-wire and three-wire schemes are supported. An LED meter monitors the output.

Controls and indicators:
  • LED power meter
  • 13 system fault LEDs
  • Two fault state buttons
  • Two emergency state buttons
  • Six EMG zone status LED pairs
  • Six EMG zone select buttons
  • Six BGM zone select LEDs
  • Six BGM zone select buttons
  • Six BGM zone volume control knobs
  • Two BGM source status LEDs
  • Three knobs for BGM volume, treble, and bass levels
  • All-call button
  • Indicator test button
  • EMG state button
  • Alert message button

    Additional Information:

    • Item Code: LBB1990
    Yes! I am Interested
    View PDF

    BOSCH LBB 1992/00 Plena Voice Alarm Router

    BOSCH LBB 1992/00 Plena Voice Alarm Router
    • BOSCH LBB 1992/00 Plena Voice Alarm Router
    Get Best Quote
    Approx. Price: Rs 78,880 / PieceGet Latest Price

    Product Details:

    Model NumberLBB1992
    Voltage230/115 VAC,+-10%,50/60 Hz
    Relative humidity95%
    Inrush current1.5 A 230 VAC / 3 A 115 VAC
    Max power consumption50 VA
    Idle / max load current0.2 A / 0.3 A
    Battery Voltage24 VDC,+15% / -15%
    Battery Current max1.8 A
    Battery Typical / max load current0.51 A / 1.5 A
    ConnectorsMC1,5 / 14-ST-3,5
    SupervisionOn EMG inputs,programmable
    Supervision methodSeries / parallel resistor
    Power handling capacity1000 W
    WeightApprox. 3 kg
    MountingStandalone,19" rack
    Dimensions88 x 430 x 260 mm,(19" wide,2U high)
    Operating Temperature-10 deg C to +55 deg C (14 deg F to +131 deg F)
    Storage Temperature-40 deg C to +70 deg C (-40 deg F to +158 deg F)

    The Plena Voice Alarm Router is an expansion unit that can add six zones and 12 input contacts to the Voice Alarm System. It can use the built-in amplifier on the LBB 1990/00 Voice Alarm Controller, and provides inputs and outputs for one or two amplifiers in a multi- amplifier one or two-channel system.

    It provides dual channel opera tion for calls and BGM simultaneously to a maximum of six different zones, using two Plena amplifiers. Additionally, single channel operation is possible with only one Plena amplifier.

    Multiple routers can also share one amplifier, including the internal amplifier on the controller unit. It is possible to use any number of amplifiers from one up to the number of routers used. The controller supports A/B wiring.

    • Expand the voice alarm system with six zones
    • EN 54‐16 certified and EN 60849 compliant
    • 12 additional input contacts
    • Six volume override output contacts
    • Supervision within the Plena Voice Alarm System


    Controls and indicators Front:

    • Meter (LED''s for -20, -6, 0 dB and Power ON)
    • Eight system fault LEDs
    • 12 loudspeaker line fault LEDs
    • Six EMG call-zone selection buttons
    • 12 EMG call-zone status LEDs
    • Six BMG zone selector buttons
    • Six BMG zone status LEDs


    Controls and indicators Back:

    • 2 x DIP switch
    • Unit ID rotary control
    • Mains voltage selector
    • Power switch
    • Mains socket


    Interconnections Back:

    • 12 loudspeaker outputs
    • Two external amp inputs
    • Call output
    • Six volume override outputs
    • 12 trigger inputs
    • RS-232 connector
    • Two system interlinks
    • Two external amp outputs (XLR/balanced)
    • Power amp fault output
    • 24 VDC power output
    • 24 VDC power input
    • Two extra trigger outputs
    • Earth connection screw

    Additional Information:

    • Item Code: LBB1992
    Yes! I am Interested
    View PDF

    BOSCH LBB-1956/00 Plena Voice Alarm Call Station

    BOSCH LBB-1956/00 Plena Voice Alarm Call Station
    • BOSCH LBB-1956/00 Plena Voice Alarm Call Station
    Get Best Quote
    Approx. Price: Rs 21,580 / PieceGet Latest Price

    Product Details:

    Voltage range24 VDC supplied by LBB 1990/00 (or 18 to 24 VDC or VAC external power supply)
    Stem length with mic390 mm (15.35 in)
    Cable length5 m (16.4 ft)
    Current consumption30 mA (plus 15 mA per keypad)
    Operating temperature-10 deg C to +45 deg C (14 deg F to +113 deg F)
    Storage temperature-40 deg C to +70 deg C (-40 deg F to +158 deg F)
    Relative humidity95 %
    Nominal sensitivity85 dB SPL (gain preset 0 dB)
    Nominal output level700 mV
    Input sound level (max)110 dB SPL
    Gain preset+6 / 0 / -15 dB
    Input noise level (equiv.)25 dB SPLA
    Limiter threshold2 V
    Compression ratio limiter120
    Distortion0.6% (maximum input)
    Frequency response100 Hz to 16 kHz
    Speech filter-3dB at 315 Hz,high-pass,6 dB/oct
    Output impedance200 ohm
    Base dimensions40 x 100 x 235 mm (1.57 x 3.97 x 9.25 in)
    WeightApprox. 1 kg
    ColorCharcoal with silver

    The Plena call station is a stylish, high-quality call station with a stable metal base design, a flexible microphone stem and a unidirectional condenser microphone. It can make calls to selected zones (one to six and all-call) in a public address system built with the Plena Voice Alarm System. In addition to tabletop use, the special design allows it to be neatly flush mounted in desktops. The Plena Voice Alarm Keypad (LBB 1957/00) is an extension adding seven additional keys.

    • Stylish six-zone call station for the Plena Voice Alarm System
    • Six zone selection keys, all-call key and momentary PTT-key for calls
    • Selectable gain, speech filter, limiter, and output level for improved intelligibility
    • LED indications for zone selection, fault, and emergency state
    • Call station extension provides seven additional zone and zone group keys



    Each call station supports six zone selections. The number of selectable zones or zone groups can be increased by connecting call station keypads (LBB 1957/00). Up to eight keypads can be added with each keypad adding seven zone or zone-group keys.


    This call station features selectable gain, a selectable speech filter, and a limiter for improved intelligibility. The call station has a balanced line level output, making it possible to position it up to 1000 meters from the controller, using CAT-5 extension cables. With shielded cable, the call station can also be used in an EMC level 5 (heavy industry) environment.


    DIP switches at the base of the call station select different microphone gain levels, the call station ID, and the speech filter. A service accessible rotary control provides microphone level attenuation. LEDs on the call station show which zones have been selected. Three additional LEDs give visible feedback on the active state of the microphone and the system. Green flashing means standby (chime is sounding). Green indicates microphone active. Amber indicates that the system has detected a fault, and red indicates that the system is in the emergency state.


    Controls and indicators:

    • Four status LEDsPTT-key
    • PTT status LED
    • Six zone selection keys
    • Six zone selection LEDs
    • All-call key
    • Eight DIP switches
    • Rotary volume control



    • Two RJ45 jacks
    • 24 VDC input
    • Keypad connector

    Additional Information:

    • Item Code: LBB1956
    Yes! I am Interested
    View PDF

    Explore more products

    Reach Us
    S. K. Chauhan (Director)
    S-548, 2nd Floor, School Block, Part 2
    Shakarpur Khas, New Delhi- 110092, Delhi, India

    Call Us

    Share Us

    F GT L

    Send E-mailSend SMS