126 en | Functionality PRAESENSA
2021.12.21 | V0.15b | F.01U.402.882
Underwriters Laboratories Listing Document (ULLD)
Bosch Security Systems B.V.
Ethernet switch
– Six OMNEO network ports, for loop‑through connections to adjacent devices:
– Five ports are for copper connection on RJ45, two of them provide Power over
Ethernet (PoE) to supply power to connected call stations or other devices.
– One port provides an SFP‑cage for Small Form‑factor Pluggable transceivers for
single or multi‑mode glass fiber connections.
General purpose control inputs and outputs
– Eight control inputs to receive signals from external systems.
– Eight voltage free single pole, double throw (SPDT) relay contacts to activate external
devices.
– Control input and output functions are software configurable.
Fault tolerance and supervision
– Supervision of mains, battery and device operation and all connections; faults are
reported to the system controller and logged.
– Automatic battery backup takeover from mains in case of mains failures.
– Multiple OMNEO network connection ports, supporting redundant network connections.
– Supervised audio lifeline to connected amplifiers, as backup for a failing amplifier
network interface.
5.5 LCD call station | PRA-CSLD, PRA-CSLW
5.5.1 Functions
IP‑network connection
– Direct connection to the IP‑network.
– For redundant network and power connection, a second Network cable should be
connected.
Business operation
– Full color 4.3" capacitive touch screen with intuitive function menu navigation provides
guidance and feedback during the process of live announcements, pre‑recorded
messages and music control. Successful broadcast of announcements/messages and
changes to the background music settings are clearly indicated.
– Built‑in monitor loudspeaker with volume control.
– Local audio line input (with stereo to mono conversion) for connecting an external audio
source.
– 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).
– If the call station is not used for a while, it will switch to sleep mode to save energy. It
will immediately wake up when the screen, or a button, is touched.
Only valid for the PRA-CSLD
– Press‑to‑talk button gives tactile feedback and is recessed to prevent accidental use.
Only valid for the PRA-CSLW
– Press‑to‑talk switch on hand‑held microphone.
Supervision
– Supervision of all critical elements; the audio path is supervised, as well as the
communication to the network.
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