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.
