PRAESENSA
Functionality | en
127
Bosch Security Systems B.V.
Underwriters Laboratories Listing Document (ULLD)
2021.12.21 | V0.15b | F.01U.402.882
Fault tolerance
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Each of the two RJ45 network connectors accept PoE to power the call station. This
provides fail‑safe network connection redundancy, as one connection is sufficient for full
operation.
5.6
Call station extension | PRA-CSE
5.6.1
Functions
Business operation
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Connection of up to four PRA-CSE extensions, each with twelve buttons. The buttons can
be configured for various functions, but they are especially useful for zone selection,
giving a clear overview of accessible zones and the LED indicators for each button show
the status of the respective zone (like being selected, occupied or at fault).
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For UL864 and UL2572 a PRA‑FRPx‑US must be used for emergency operation. PRA-CSLx
are only allowed to be used for non-emergency operation.
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All critical alarm functions are accessible via buttons for operators wearing gloves.
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All indicators of the extension take part in the indicator test function of the connected
call station.
Connection
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Reliable, locked, single cable interconnection between call station and extension and
between extensions.
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Robust metal coupling plate.
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All extensions are automatically addressed, from left to right.
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All assembling can be done with one standard Torx TX10 screwdriver.
Labeling
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Removable front cover for easy labeling with space for three lines of text per button.
Button cap
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Three button caps are included to prevent unintended activation of critical buttons.
5.7
Ethernet switch | PRA-ES8P2S
5.7.1
Functions
Intended for PA/VA systems
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Managed industrial Gigabit Ethernet switch with convection cooling and DIN‑rail
mounting, designed for long term continuous operation.
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Redundant wide range DC power input.
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PoE outputs protected against overloads and short circuits.
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Comes with pre‑installed and pre-configured firmware for quick installation and optimum
performance.
Advanced features
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Managed switch, configurable via web browser, with eight Gigabit copper ports with PoE
and two SFP ports for PRA-SFPLX single mode and/or
PRA-SFPSX multimode fiber transceiver modules.
–
Deactivated Energy Efficient Ethernet (EEE) mode on all ports to avoid problems in
combination with audio clock synchronization (IEEE 1588) in combination with OMNEO,
Dante and AES67.
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Wire speed switching in hardware to avoid variable latency that may cause audio
streaming problems.
–
Full Quality of Service (QoS) through differentiated services (DiffServ) on all ports,
compatible with OMNEO Docent diagnostic tool.
