The fast route to safety
PLENA Public Address and Voice Alarm System
PLENA voice alarm components
LBB1990/00 PLENA Voice Alarm Controller
Heart of the PLENA Voice Alarm System: six zones on board, up to 120 with routers, a built-in 240 W amplifier and message manager, supervised emergency microphone.
- 6 Zones up to 120
- 240 W Amplifier Built In
- EN 54-16 Certified
The fast route to safety
PLENA Public Address and Voice Alarm System
PLENA voice alarm components
LBB1990/00 PLENA Voice Alarm Controller
Heart of the PLENA Voice Alarm System: six zones on board, up to 120 with routers, a built-in 240 W amplifier and message manager, supervised emergency microphone.
- 6 Zones up to 120
- 240 W Amplifier Built In
- EN 54-16 Certified
Key specs
- 6 zones on board, up to 120 with LBB1992/00 routers
- Built-in 240 W amplifier, 100 V outputs, A/B wiring
- Message manager, up to 255 messages
- 6 emergency and 6 business triggers, 16 priorities
- Up to 8 call stations on CAT-5
- Supervised emergency microphone and loudspeaker lines
- EN 54-16 / ISO 7240-16 certified, 2 U
Bosch LBB1990/00 Technical Specifications
System
| Specification | Value |
|---|---|
| Loudspeaker zones | 6 onboard, expandable to 120 with additional six-zone routers |
| Supported call stations | Up to 8 |
| Priority levels | 16 |
| System supervision | Loudspeaker line impedance, emergency microphone, message manager, and amplifiers |
| Loudspeaker wiring | A/B wiring supported |
Electrical
| Specification | Value |
|---|---|
| Mains supply | 230/115 V AC, ±15%, 50/60 Hz |
| Mains inrush current | 8 A |
| Maximum apparent power | 600 VA |
| Battery backup supply | 24 V DC, ±15% |
| Maximum battery supply current | 14 A |
Amplifier and Audio Performance
| Specification | Value |
|---|---|
| Built-in amplifier output | 240 W RMS / 360 W maximum |
| Output reduction on backup power | −1 dB |
| Frequency response | 60 Hz to 18 kHz (+1/−3 dB at −10 dB relative to rated output) |
| Distortion | <1% at rated output, 1 kHz |
| Bass adjustment | ±8 dB at 100 Hz |
| Treble adjustment | ±8 dB at 10 kHz |
Audio Inputs
| Specification | Value |
|---|---|
| Mic/line input | 1 × input with XLR and 6.3 mm jack |
| Mic/line sensitivity | 1 mV mic / 1 V line |
| Mic/line impedance | >1 kΩ mic / >5 kΩ line |
| Mic/line signal-to-noise ratio | >63 dB mic / >70 dB line at maximum volume. >75 dB at minimum volume or muted. |
| Mic/line common-mode rejection | >40 dB (50 Hz to 20 kHz) |
| Mic/line headroom | >25 dB |
| Speech filter | High-pass, −3 dB at 315 Hz, 6 dB/octave |
| Phantom power | 12 V in microphone mode |
| VOX trigger level | −20 dB (100 µV mic / 100 mV line), or activation via input contact |
| Limiter | Automatic |
| Background music inputs | 2 × unbalanced RCA inputs, stereo summed to mono |
| RCA line input sensitivity / impedance | 200 mV / 22 kΩ |
| RCA line input signal-to-noise ratio | >70 dB at maximum volume. >75 dB at minimum volume or muted. |
| RCA line input headroom | >25 dB |
| 100 V input | MSTB 2.5/16-ST connector, 1,000 W power handling |
Audio Outputs
| Specification | Value |
|---|---|
| Loudspeaker outputs | Six transformer-isolated 100 V zones with floating MSTB 2.5/16-ST connections |
| Zone output rating | 700 W per zone output |
| Separate amplifier output | 70 V and 100 V |
| Call-only output | 100 V |
| Tape output | 1 × RCA pair (2 × mono), 350 mV nominal, <1 kΩ |
| Background music attenuation per zone | 0 / −3 / −6 / −9 / −12 / −15 dB |
| Corresponding background music output voltage | 70 / 50 / 35 / 25 / 18 / 13 V |
Control and Connectivity
| Specification | Value |
|---|---|
| Trigger inputs | 12 programmable inputs, split into 6 emergency and 6 business inputs |
| Trigger input connector | MC 1.5/14-ST-3.5 |
| Emergency input supervision | Programmable, using series/parallel resistors |
| Volume override outputs | 6 configurable outputs supporting 3-wire, 4-wire (24 V), and fail-safe 4-wire connections |
| Relay contact rating | 100 V, 2 A, voltage-free |
| Relay connector | MC 1.5/14-ST-3.5 |
| Emergency and call active relays | NO / COM / NC |
| Fault relay | NO / COM / NC, normally energized for fail-safe operation |
| General-purpose relays | NO / COM |
| System interconnections | RJ45 over shielded CAT-5 |
| Call station and remote-control connections | Two redundant connectors for each |
| Router connection | LBB1992/00 PLENA Voice Alarm Router |
| PC configuration and message upload | USB 2 |
Message Manager
| Specification | Value |
|---|---|
| Audio file format | Mono WAV, 16-bit PCM |
| Supported sample rates | 24 / 22.05 / 16 / 12 / 11.025 / 8 kHz |
| Frequency response at 24 kHz | 100 Hz to 11 kHz (+1/−3 dB) |
| Frequency response at 22.05 kHz | 100 Hz to 10 kHz (+1/−3 dB) |
| Frequency response at 16 kHz | 100 Hz to 7.3 kHz (+1/−3 dB) |
| Frequency response at 12 kHz | 100 Hz to 5.5 kHz (+1/−3 dB) |
| Frequency response at 11.025 kHz | 100 Hz to 5 kHz (+1/−3 dB) |
| Frequency response at 8 kHz | 100 Hz to 3.6 kHz (+1/−3 dB) |
| Distortion | <0.1% at 1 kHz |
| Signal-to-noise ratio | >80 dB at maximum volume |
| Internal memory | 16 MB flash ROM |
| Maximum stored messages | 255 |
| Recording and playback time | 1,000 s at 8 kHz or 333 s at 24 kHz |
| Flash memory supervision | Continuous checksum verification |
| DAC supervision | 1 Hz pilot tone |
| Data retention | >10 years |
Power Consumption
| Specification | Value |
|---|---|
| Mains operation, maximum | 550 W |
| Mains operation at −3 dB / −6 dB | 440 W / 340 W |
| Mains operation with pilot tone / idle | 136 W / 60 W |
| 24 V DC operation, maximum | 14.0 A (336 W) |
| 24 V DC operation at −3 dB / −6 dB | 12.5 A (300 W) / 9.5 A (228 W) |
| 24 V DC operation with pilot tone / idle | 2.5 A (60 W) / 0.9 A (22 W) |
| Pilot-tone test condition | 20 kHz at −20 dB with maximum loudspeaker load |
Mechanical
| Specification | Value |
|---|---|
| Dimensions (H × W × D) | 144 × 430 × 370 mm |
| Rack mounting | 19-inch rack, 3U |
| Weight | Approx. 21.17 kg |
| Colour | Charcoal |
Environmental
| Specification | Value |
|---|---|
| Operating temperature | −10 °C to +55 °C (+14 °F to +131 °F) |
| Storage and transport temperature | −40 °C to +70 °C (−40 °F to +158 °F) |
| Relative humidity | <95% |
| Fan noise | <48 dB SPL at 1 m at maximum output |
Standards
| Specification | Value |
|---|---|
| Voice alarm certification | EN 54-16 |
| Safety | EN 60065 |
| Immunity | EN 50130-4 |
| Emissions | EN 55103-1 |
Questions & answers
Know before you buy
Quick answers about the LBB1990/00, and how it compares.
What is the Bosch LBB1990/00?
The Bosch LBB1990/00 is the main controller for the PLENA Voice Alarm System. It routes live announcements, prerecorded evacuation messages, and background music to selected loudspeaker zones. It also monitors loudspeaker lines for faults.
How many loudspeaker zones can the Bosch LBB1990/00 control?
The controller supports six zones on its own. A PLENA Voice Alarm System can expand to up to 120 zones using Bosch LBB1992/00 six-zone routers.
Which loudspeakers are compatible with the Bosch LBB1990/00?
The controller’s six zone outputs are designed for 100 V constant-voltage loudspeakers. For voice alarm projects, select compatible voice alarm loudspeakers and verify the total loudspeaker load as part of the system design.
Can the voice alarm controller keep working during a power outage?
Yes. The LBB1990/00 has a 24 V DC input for an external backup power supply that powers the system when mains power is unavailable. Backup runtime depends on the connected supply and the system load.
Can a fire alarm panel trigger a prerecorded evacuation message?
Yes. A compatible contact output from the fire alarm panel can activate one of the controller’s six programmable emergency inputs. The PLENA configuration assigns the message and loudspeaker zones to that input.
Does the Bosch LBB1990/00 need an external amplifier?
The Bosch LBB1990/00 has a built-in 240 W RMS amplifier that can drive 100 V loudspeakers within its rated load. An external amplifier can be added for two-channel operation, allowing announcements in selected zones while background music continues in other zones.
Who is the authorized Bosch distributor in Pakistan?
ESCO (Electronic Security Company) is an authorized Bosch distributor in Pakistan. Contact ESCO to check the current Bosch LBB1990/00 price and availability or request a project quotation.