• High efficiency class-D amplifier channel(s)
• Switched mode power supply
• Local audio inputs
• Mains and battery operation
• Complete supervision

The basic amplifiers are cost effective alternatives to the regular Praesideo power amplifiers, for situations where no built-in digital signal processing functions, such as equalizers, delay and AVC are required. They do not have a Praesideo network connection. Instead, these amplifiers are connected to the Praesideo network via the PRS-16MCI Multi Channel Interface, which provides the basic amplifier with audio signals and has full control. There are four versions, the PRS‑1B500 (1 x 500 W), PRS‑2B250 (2 x 250 W), PRS‑4B125 (4 x 125 W) and the PRS‑8B060 (8 x 60 W). The basic amplifiers are completely supervised and fault events are reported via the multi channel interface to the Praesideo network controller. The basic amplifiers provide connections for separate group A and group B loudspeakers for each zone, and support class‑A loudspeaker loop wiring. The units should be mounted in a 19″-rack with the included mounting brackets.

Key Points:

• Four OMNEO or Dante™ audio inputs and outputs
• Eight supervised control inputs and five control outputs
• Redundant optical network connection
• Redundant OMNEO network connection
• Headphone connection and VU‑meter for audio monitoring

• Four OMNEO or Dante™ audio inputs and outputs
• Eight supervised control inputs and five control outputs
• Redundant optical network connection
• Redundant OMNEO network connection
• Headphone connection and VU‑meter for audio monitoring

OMNEO, developed by Bosch, is a network protocol for real-time uncompressed digital audio distribution and control over industry standard IP networks.

• 1, 2, 4, or 8 audio outputs (selection from 100 / 70 / 50 V outputs)
• Audio processing and delay for each amplifier channel
• Amplifier supervision and spare amplifier switching
• Loudspeaker line and loudspeaker supervision (LBB 4428/00 only line supervision)
• Eight control inputs and 1, 2, 4 or 8 control outputs

There are four types of Power Amplifier units in the Praesideo product range. These differ in the number of amplifier channels per frame: one, two, four, or eight. The overall power rating is 500 watts for all of the amplifiers. The Power Amplifiers can be set to 100 V, 70 V and 50 V output tappings. They have short-to-ground and short-circuit detection functions, and can generate their own pilot tone for supervision purposes.

• High efficiency class-D amplifier channel(s)
• Switched mode power supply
• Local audio inputs
• Mains and battery operation
• Complete supervision

The basic amplifiers are cost effective alternatives to the regular Praesideo power amplifiers, for situations where no built-in digital signal processing functions, such as equalizers, delay and AVC are required. They do not have a Praesideo network connection. Instead, these amplifiers are connected to the Praesideo network via the PRS-16MCI Multi Channel Interface, which provides the basic amplifier with audio signals and has full control. There are four versions, the PRS‑1B500 (1 x 500 W), PRS‑2B250 (2 x 250 W), PRS‑4B125 (4 x 125 W) and the PRS‑8B060 (8 x 60 W). The basic amplifiers are completely supervised and fault events are reported via the multi channel interface to the Praesideo network controller. The basic amplifiers provide connections for separate group A and group B loudspeakers for each zone, and support class‑A loudspeaker loop wiring. The units should be mounted in a 19″-rack with the included mounting brackets.

• Records calls for automatic playback to previously occupied zones (call stacker)
• Acoustic feedback suppression by recording a call with delayed broadcast (time shifter)
• Possibility to monitor a call before broadcasting
• Records and/or plays back up to eight calls simultaneously
• Stores up to 16 calls

The Call Stacker is a small unit that records calls that cannot be sent to all required zones because some are occupied by a higher priority call. The unit can store up to 16 calls in high‑quality format with a maximum of three minutes for each call, including chimes and pre‑recorded messages. Playback of a call can start while it is still being recorded. The unit can record and/or playback up to eight calls simultaneously. More units can be added to a system in order to increase the number of recordable calls. Units can be connected to the Praesideo network at any place.

• Connects a remote call station to the Praesideo network via CAT‑5 cable (up to 1 km)
• Powered by the Praesideo network and/or local power supply
• Two supervised control inputs
• Built‑in DSP for audio processing functions
• Complete supervision of the unit

The PRS‑CSI is an interface between a single remote call station, PRS‑CSR, or a remote call station kit, PRS‑CSRK, and the fiber optical Praesideo network. It uses CAT-5 cable for the connection to the remote call station. The CAT‑5 cable, carrying digital audio and control data, can be as long as 1 km. The length of the CAT‑5 cable is not a part of the Praesideo optical network length. This considerably increases the overall possible length of the optical network, especially in cases, where the call station is located far from the rest of the system. The call station interface can get its power from the Praesideo network, and/or from a local power supply. It is fully supervised.

• Eight programmable control inputs linked to 16 outputs
• Two serial interfaces to call stations or other keypads
• Up to 16 keypads can be connected to one call station

The call station keypad module is used in combination with a basic or remote call station module to make manual or pre-recorded announcements to any assigned zones, or to execute pre-defined actions. It is functionally equivalent to the LBB 4432/00 Call Station Keypad. One of the main applications is the development of fireman’s panels. However, since the call station keypad has eight programmable input connections, each with two associated output
connections, it is also suited for other control applications.

• Numeric keypad for zone selection and user access
• Serial data and power interface to call‑station basic
• Can be combined with normal call‑station keypads
• LCD for user feedback
• Stylish and modern design

The Call‑Station Numeric Keypad is used in combination with a basic or remote call‑station. The call‑station provides the microphone and press‑to‑talk key, while the numeric keypad can be used for user access, zone and zone group selection. It works together with call‑station keypads for pre‑configured actions. The built‑in LCD provides feedback to the user.

• Connects to call station interface via CAT-5 cable
• Up to 1 km from Praesideo optical network
• Uses standard Praesideo keypads for extension
• Built-in limiter
• Powered via CAT-5 and/or local power supply

The PRS‑CSR is a call station with the same functionality as the basic call station, LBB 4430/00, but it uses CAT-5 cable for its connection to the Praesideo network. It connects, one-to-one, to the call station interface, PRS‑CSI, which is part of the Praesideo optical network. The CAT-5 cable, carrying digital audio and control data, can be as long as 1 km. The length of the CAT-5 cable is not a part of the Praesideo optical network length. This considerably increases the overall possible length of the optical network. The PRS-CSR can be extended with up to 16 keypads (LBB 4432/00 or LBB 4434/00), each with eight programmable keys. Extension with a numeric keypad (PRS‑CSNKP) is also possible.

• Connects to call station interface via CAT‑5 cable
• Up to 1 km from Praesideo optical network
• Connection for keypads
• Connection for transducers and status LEDs
• Stable metal enclosure

The PRS‑CSRM is a module with the same functionality as the remote call station, PRS‑CSR, but without its housing and other components. It is a building block to make custom call stations or panels. It connects via a CAT‑5 cable, one‑to‑one, to the call station interface, PRS‑CSI, which is part of the Praesideo optical network. The CAT‑5 cable, carrying digital audio and control data, can be as long as 1 km. The CAT‑5 cable does not contribute to the Praesideo optical network length. This considerably increases the overall possible length of the network. The PRS‑CSRM can be extended with up to 16 keypads (LBB 4432/00 or PRS‑CSKPM), each with eight configurable keys. Extension with a numeric keypad (PRS‑CSNKP) is also possible.

• Redundant network connection
• Indicators for power and fault status
• Two supervised control inputs
• Can use a local power supply

Most of the Praesideo system units have plastic fiber optic interfaces. Plastic fiber is used to interconnect nodes which are less than 50 meters apart. For distances of more than 50 meters, glass fiber optic cable is used. A fiber interface converts from plastic to glass fiber, and vice versa. The fiber interfaces have a power supply input to provide power to remote network sections, and two control inputs. The control inputs can pass on supervision information about the power supply connected to the fiber interface.