• Flexible power partitioning across all channels
• 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

This is a flexible and compact multi‑channel power amplifier for 100 V or 70 V loudspeaker systems in Public Address and Voice Alarm applications. It fits in centralized system topologies, but also supports decentralized system topologies because of its OMNEO IP‑network connection, combined with DC‑power from a multifunction power supply.
The output power of each amplifier channel adapts to the connected loudspeaker load, only limited by the total power budget of the whole amplifier. This flexibility, and the integration of a spare amplifier channel, makes it possible to utilize the available power effectively and use less amplifiers for the same loudspeaker load, compared to using traditional amplifiers.
Digital sound processing and control, adjusted to the acoustics and requirements of each zone, allow for better sound quality and speech intelligibility.

• Flexible power partitioning across all channels
• 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

This is a flexible and compact multi‑channel power amplifier for 100 V or 70 V loudspeaker systems in Public Address and Voice Alarm applications. It fits in centralized system topologies, but also supports decentralized system topologies because of its OMNEO IP‑network connection, combined with DC‑power from a multifunction power supply. The output power of each amplifier channel adapts to the connected loudspeaker load, only limited by the total power budget of the whole amplifier. This flexibility, and the integration of a spare amplifier channel, makes it possible to utilize the available power effectively and use less amplifiers for the same loudspeaker load, compared to using traditional amplifiers. Digital sound processing and control, adjusted to the acoustics and requirements of each zone, allow for better sound quality and speech intelligibility.

• Solid housing for surface-mounting or flush mounting
• Omni‑directional MEMS microphone for noise level tracking
• Digital signal processing to adapt frequency response
• PoE powered device with Gigabit network interface
• Up to four sensors can be combined to cover a large zone

The PRA-ANS is an ambient noise sensor to monitor changing ambient noise levels for automatic adjustment of announcement or background music levels (AVC – Automatic Volume Control). This ensures the public address audio is set at a configurable level above the ambient noise in order to guarantee intelligibility of announcements, yet at a comfortable loudness.

• Advanced functionality for high‑quality announcements, messages, text‑to‑speech, internet radio, music management and scheduled events
• Support of personal devices such as third party PCs and wireless tablets
• Possibility to configure user group profiles for different access levels
• Each connected user device requires one software license

The PRA-APAL is a license code for an operator device to access the advanced public address server PRAAPAS for PRAESENSA. It adds advanced business related public address functions to the function set provided by the system controller. A PC or wireless tablet, connected to the local IP‑network, functions as operator device with an intuitive graphical user interface, controlled by mouse or touch screen. A headset, connected via USB or Bluetooth to the operator device, may be used for voice announcements and audio monitoring. The integrated web server of the PRA-APAS keeps the operator device platform independent. Each operator device uses its own web browser as operator interface.

• Server for the advanced public address software license
• Interface for third party PCs and tablet devices to the PRAESENSA IP‑network
• IP‑networked on existing Local Area Networks
• Secure internet connection to the Local Area Network (LAN) of the building, internet radio, online music streaming and text‑to‑speech‑service
• Internal memory for business messages library and music playlists

The PRA-APAS is an industrial PC with pre‑installed software, acting as a server for PRAESENSA. It provides advanced business related public address functions without compromises and does therefore not support emergency functionalities. The PRA-APAS supports connections to two separate local area networks, the PRAESENSA secure network and the public network with access to the Internet, with a firewall in between. On the public network it connects to the Internet and to one or more licensed operator devices, such as a wireless tablet or a regular PC. On the secure PRAESENSA network it interfaces with the system controller for control and transfer of multiple simultaneous audio channels. The operator devices use their own web browser to control background music, streaming from PRA-APAS’ own internal memory or from external music portals and Internet radio stations. It offers announcement creation and control facilities to the operator, including message scheduling, live call recording with pre‑monitoring and playback, and even multi‑lingual text‑to‑speech calls, using on‑line conversion services.

• Basic open frame call station for custom call panel solutions without LCD
• Supervised hand‑held microphone with helix cable and loudspeaker included
• CAN‑interface for selection switches and status indicators
• Connections for power LED and status LEDs
• Dual OMNEO IP‑network connection and redundant Power over Ethernet

The basic call station kit is an open frame call station to create dedicated full custom operator panels for PRAESENSA Public Address and Voice Alarm systems. It has the same functionality as the PRA-CSLW, but without LCD user interface to facilitate easier mounting in operator desks or in wall‑mounted fireman’s panel enclosures.
It comes with a hand‑held supervised omni‑directional microphone for close talking with press‑to‑talk button
and a small monitor loudspeaker. The kit has a CAN‑bus interface on RJ12 to a PRACSEK Call station extension kit for connection of selection switches and status indicator LEDs, or to connect to a full custom control board with switches and indicators. The interface is compatible with the PRA-CSE and one to four of these devices can be connected. The kit only requires a connection to an OMNEO IP‑network with Power over Ethernet (PoE) for communication and power supply combined. It can be configured as business and emergency call station. The PRA-CSBK is considered a component that must be installed in a final product. The final product must be reconfirmed to meet applicable EMC directives.

• Extension keypad for desktop PRA-CSLD and wall‑mount PRA-CSLW call station
• Twelve buttons with tactile feedback and configurable functionality
• Light ring around each button for selection confirmation
• Multi‑color zone status indicators for buttons configured for zone selection
• Ergonomic button layout with removable front cover for access to button labels

This keypad extension is used in combination with PRAESENSA call stations to make selections for business and alarm calls. One device adds twelve configurable buttons with light ring. Each button has two additional indicators for user feedback, related to the configured functionality of that button.
Up to four PRA-CSE can be connected to one call station. Using extension keypads for zone selection allows all zones to be accessible and visible at the same time. It shows a complete status overview of selected and occupied zones or zones with faults.
The extension keypad is delivered with a metal coupling plate and patch cable to link it to a call station or other extension keypad. The front cover can be easily removed to insert labels with up to three lines of text per button and a header section on top.

• Desktop housing with gooseneck microphone
• 4.3″ full‑color capacitive touch screen
• Graphical user interface for optimum user guidance and feedback
• Status and fault indicators for voice alarm purposes
• Dual OMNEO IP‑network connection and redundant Power over Ethernet

This call station for use in PRAESENSA Public Address and Voice Alarm systems is easy to install and intuitive
to operate because of its touch screen LCD, providing clear user feedback about setting up a call and monitoring its progress, or controlling back ground music. The call station allows for positioning without much effort, because it only requires a connection to an OMNEO IP‑network with Power over Ethernet (PoE) for communication and power supply combined. The housing is fit for surface mounting and flush mounting. It can be configured for use as business call station, but also as emergency call station. The stylish design incorporates a supervised microphone, an internal monitor loudspeaker and a socket to insert a local audio source for background music. The 4.3″ high‑resolution full‑color capacitive touch screen gives the operator optimum control and feedback at all times. Add up to four PRA-CSE call station extensions for zone selection and other functions. Without extensions the call station can only be used with a pre‑configured zone selection.

• Wall mount housing with fixed hand‑held microphone and helix cable
• 4.3″ full‑color capacitive touch screen
• Graphical user interface for optimum user guidance and feedback
• Status and fault indicators for voice alarm purposes
• Dual OMNEO IP‑network connection and redundant Power over Ethernet

This call station for use in PRAESENSA Public Address and Voice Alarm systems is easy to install and intuitive
to operate because of its touch screen LCD, providing clear user feedback about setting up a call and monitoring its progress, or controlling back ground music. The call station allows for positioning without much effort, because it only requires a connection to an OMNEO IP‑network with Power over Ethernet (PoE) for communication and power supply combined. The housing is fit for surface mounting and flush mounting.
It can be configured for use as business call station, but also as emergency call station. The stylish design uses a heavy metal base with a recessed press‑to‑talk button and provides a hand‑held omni‑directional microphone to eliminate the proximity effect which creates a boomy sound when a user speaks close to the microphone. It has a built‑in loudspeaker for call monitoring and a socket to connect a local background music source. It can be easily installed in a wall mount cabinet or flush mounted on a panel.
The 4.3″ high‑resolution full‑color capacitive touch screen gives the operator optimum control and feedback at all times. Add up to four PRA-CSE call station extensions for zone selection and other functions. Without extensions the call station can only be used with a pre‑configured zone selection.

• Compact device for loudspeaker end‑of‑line supervision
• Reliable solution for (long) loudspeaker lines
• Fault detection in amplifier without additional wiring
• Low level, high frequency pilot tone
• Flexible mounting options

This end‑of‑line device is a reliable solution for loudspeaker line integrity supervision, which is a requirement for emergency sound systems. It is connected at the end of a loudspeaker line, after the last loudspeaker of a series of looped-through loudspeakers.
It communicates with the PRAESENSA amplifier channel driving that loudspeaker line, to confirm the integrity of the line. Where impedance measurements may not detect a disconnected loudspeaker, depending on the number
of connected loudspeakers and cable type, or report false faults, the end-of-line device provides a superior solution to report the correct status of the loudspeaker line.
The enclosure size is compatible with the mounting provisions in most Bosch loudspeakers for supervision boards or devices. It can also be reduced in size to fit most cable junction boxes.

• Sixteen general purpose inputs for control actions from external switches
• Eight general purpose relay outputs to activate external control circuits
• Two supervised trigger outputs for NAC boosters
• PoE powered device with dual redundant Gigabit network interface
• LED status indicators for all inputs and outputs

The PRA-IM16C8 Control interface module adds configurable and supervised control inputs, voltage‑free control outputs and supervised trigger outputs to the PRAESENSA system. These contact inputs and outputs provide the easy logic connectivity of a PRAESENSA system to auxiliary equipment such as fire alarm systems, strobes, indicators, or speaker relays.
The PRA-IM16C8 enclosure allows for DIN rail installation near to the auxiliary equipment for short interconnections. The module only requires a connection to an OMNEO IP‑network with Power over Ethernet (PoE) for communication and for power supply combined.

• Overcome limitations of a single system controller
• Expand system span with up to 20 subsystems
• License for one subsystem to enable networking with the master controller
• Possibility of system-wide emergency calls from central EN 54-16 certified call stations to all subsystems
• Network-wide propagation of error and status messages

The PRA-LSPRA software license creates a PRAESENSA multi-system architecture with higher scalability in comparison to a single system. A system with master and subsystem controllers improves the overall performance by extending the number of devices and zones. A master system controller is a standard PRAESENSA system controller with an active PRA-LSPRA license per subsystem. The same amount of licenses is required for an optional redundant master controller. Subsystem controllers do not require licenses. With a master controller and a maximum of 20
subsystems, PRAESENSA can support 3000 devices and 10,000 zones.