Bosch LBB1957/00 – Plena Voice Alarm Keypad

The Bosch LBB1957/00 – Plena Voice Alarm Keypad is a powerful and scalable zone expansion module designed for use with the Bosch LBB1956/00 Plena Voice Alarm System Call Station. Built for professional public address and emergency voice evacuation (EVAC) systems, it provides seven additional zone selection keys, making it ideal for complex installations requiring precise multi-zone control.

Engineered for reliability, simplicity, and seamless system integration, the LBB1957/00 is widely used in airports, shopping centers, offices, schools, factories, transport terminals, and large public buildings where dependable voice communication is critical.

🔹 Enhanced Multi-Zone Control

The base call station includes six zone keys—and by adding the LBB1957/00 keypad, operators gain seven more selectable zones or zone groups.

For larger systems, up to eight keypads can be daisy-chained to a single call station, providing robust scalability across dozens of zones. This makes the keypad a perfect solution for installations requiring broad coverage, flexible routing, and precise zone targeting.

🔹 User-Friendly Interface & Visual Feedback

The Bosch LBB1957/00 is designed for quick, intuitive operation with clear visual cues.
It includes:

• Seven illuminated zone selection keys

• Seven status LEDs showing active zones

• Eight DIP switches for configuration and addressing

During routine announcements or emergency situations, operators can instantly identify active zones and make changes with confidence.

🔹 Rugged Design with Flexible Mounting

Built with a solid metal base, the keypad offers durability and stability for 24/7 professional use.

It can be installed as:

• A desktop/tabletop device, or

• Flush-mounted into a console or workstation

Its clean, compact design complements modern control room layouts.

🔹 Reliable Connectivity & Seamless Integration

The LBB1957/00 includes:

• Two RJ45 connectors for quick daisy-chain linking

• Dedicated keypad connection port

• 24V DC power input for stable operation

It integrates effortlessly with the Plena Voice Alarm System and ensures secure communication across all connected zones.