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The Bosch Plena System is a highly reliable and scalable public address and voice alarm (PA/VA) system designed to provide clear communication and efficient evacuation control during emergency situations. It is widely used in combination with Bosch fire alarm systems to deliver a fully integrated life safety and notification solution.

Developed according to EN 54-16 and ISO 7240-16 standards, the Bosch Plena Voice Alarm System ensures that critical voice messages are transmitted accurately and intelligibly across all building zones. Unlike conventional sirens, which only provide a tone or buzzer, the Plena system enables clear, pre-recorded or live voice instructions — ensuring that occupants receive precise guidance during a fire, evacuation, or other emergencies.

System Architecture

The Plena system is based on a modular and flexible architecture. The core of the system is the Plena Voice Alarm Controller (LBB1990/00), which manages multiple amplifiers, call stations, and zone expanders. This controller continuously monitors all system components — including amplifiers, loudspeaker lines, microphones, and power supplies — to ensure complete fault supervision in compliance with fire safety standards.

The system can be configured for multi-zone operation, allowing operators to send messages or alarms to specific areas or the entire building. Each zone can have its own volume control, priority level, and automatic switching in case of amplifier failure, guaranteeing uninterrupted operation.

Integration with Bosch Fire Alarm Systems

The Bosch Plena System is designed to work seamlessly with Bosch FPA-5000 Fire Alarm Panels or other addressable fire detection systems. When a fire is detected by the alarm system, it sends an automatic signal to the Plena controller. The voice alarm system then triggers the corresponding evacuation messages, alert tones, and zone-specific announcements.

This integration ensures a coordinated emergency response — the fire alarm detects and identifies the location of the fire, while the Plena system manages the safe and efficient evacuation of people through clear voice communication. The system supports both automatic and manual control, allowing operators to take command via call stations or control panels during an emergency.

Technical Features and Advantages

Full Supervision: Continuous monitoring of amplifiers, loudspeaker lines, and power circuits

Multi-Zone Operation: Up to 60 zones with independent volume and control

Digital Message Storage: Stores pre-recorded evacuation and alert messages

Priority Management: Automatic override for emergency paging

Redundant Power Supply: Ensures operation during power failure

Integration Ready: Interfaces with Bosch FPA-5000 and other fire panels via relay or serial communication

Compliance: Certified to EN 54-16, ISO 7240-16, and local civil defense requirements

Applications

The Bosch Plena Voice Alarm System is suitable for a wide range of facilities — including airports, shopping malls, hospitals, schools, industrial plants, hotels, and office towers. Its reliable performance, speech clarity, and integration flexibility make it an ideal solution for environments where safety, communication, and building management need to work together.

Conclusion

The Bosch Plena System represents a professional-grade solution for emergency communication and public address control. When integrated with Bosch Fire Alarm Systems, it forms a comprehensive life safety network capable of early detection, intelligent alerting, and efficient evacuation management. Combining reliability, scalability, and acoustic performance, Bosch continues to set global standards in fire safety and voice alarm technology.