PRAESENSA continues to evolve

System controller redundancy is a typical requirement for voice alarm installations in international airports, railway/metro stations and power plants. In addition, it could also be an optional requirement in large convention centers, shopping malls and universities. All of these applications have one thing in common: full system functionality and the highest system availability is required at all times.

The PRAESENSA “no single point-of-failure” system concept guarantees the highest safety in system operations. To make this concept work on the system control level, you need at least one duty and one redundant controller to ensure all system related functions in the public address and voice alarm solution. Extending the system with controller redundancy can be achieved with a simple and free software upgrade.

This amplifier has the same architecture and specifications as the 8-Channel amplifier.

• 600 W Amplifier with flexible power partitioning across 4 channels
• Extremely low power consumption and heat loss
• Full supervision with integrated fail-safe redundancy
• Digital Signal Processing per channel
• IP-networked on OMNEO for audio and control

Get more from your PRAESENSA system with the free 1.10 software upgrade and extend your solution with an additional set of useful features:

• Certified public address and voice alarm installations are required to demonstrate amplifier redundancy before commissioning. As part of the certification checklist, compliance inspectors want to see and approve the spare amplifier switching. Because both 4-Channel and 8-Channel PRAESENSA amplifiers have an integrated spare amplifier channel, this cannot be demonstrated by disconnecting the network cable or power connection. The PRAESENSA 1.10 software upgrade makes it possible for the systems integrator to simulate a failing amplifier channel and force the spare amplifier channel to take over. The software will automatically switch to the spare amplifier channel and will report a fault. This is shown in both the logging viewer and the graphic user interface of the PRAESENSA Call Station.
• The new 1.10 PRAESENSA upgrade also provides individually adjustable audio delay (in m/s or ft/s) per output channel (max of 60 s/channel with 1m/s resolution), making the system extremely capable of serving tunnels, railway platforms and airport concourses.
• Additionally, it is now also possible to control the brightness of the call station LCD display, light-rings and all fault and status LEDs via an up/down adjustment on the call station extension keypad. There are 4 levels designed for conditions ranging from full daylight to complete darkness.
• Last but not least, PRAESENSA has received the DNV Type approval (Det Norske Veritas) to comply to the specified requirements of cruise ships, vessels and oil rigs.

In the PRAESENSA release 1.20, the call station graphical user interface for the operator and the configuration webpages and login viewer for the system integrator are available in multiple languages.