BOSCH Praesideo Voice Evacuation System

Product Details:

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.

Features:

• 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

Controls and indicators

• 2 x 16-character LCD for status display
• Rotary/push control button
• Mains switch

 

Interconnections

• Mains input
• Battery backup input
• Two system network connections
• Two mic/line inputs (four for LBB 4428/00)
• 100 V, 70 V or 50 V outputs (for each amplifier channel)
• 50 V output
• Eight programmable control inputs
• Control output (for each amplifier channel)
• Headphone output

Additional Information:

• Item Code: PRSNCO3

Product Details:

The LBB 4438/00 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, LBB 4437/00, 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 LBB 4438/00 can be extended with up to 16 keypads (LBB 4432/00 or LBB 4434/00), each with eight
programmable keys.

Features:-

• 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
• Complete supervision
• IEC 60849 compliant

 

Functions
The call station has a cardioid, supervised microphone on a
gooseneck stem with good speech intelligibility. A limiter and a speech filter improve intelligibility and prevent clipping of the audio. It has a volume control for the monitoring speaker and the headset. When it plays a chime or a pre-recorded message, the call station activates its speaker. When a headset is connected, it replaces the microphone and speaker. The remote call station connects via a CAT-5 cable to an LBB 4437/00 unit, which interfaces it to the Praesideo optical network. The station gets its power from the interface unit via the CAT-5 cable, but is also equipped with a local power supply connection for extreme cases with a very long cable and many keypads. Up to 16 call station keypads can connect to the station via a serial communication link. The call station provides the power for the keypads. Up to 224 priorities can be assigned to the call station. All configuration can be done via the Praesideo network controller. The remote call station is fully supervised and complies with IEC 60849. The call station supports fail-safe operation. Even if the Praesideo network controller fails, the call station is still able to put through emergency calls.

 

Controls and indicators

• Three status LEDs
• Configurable PTT-key
• Volume control for loudspeaker/headset

 

Interconnections

• RJ45 connector for CAT-5 connection
• Serial data and power supply interface for call station keypads
• Power supply connector (lockable Kycon type)
• 3.5 mm jack for headset/headphone

Additional Information:

• Item Code: LBB-4438-00