PRAESENSA
Installation wiring | en
31
Bosch Security Systems B.V.
Underwriters Laboratories Listing Document (ULLD)
2021.12.21 | V0.15b | F.01U.402.882
3.3.5
Ethernet network
The system controller has five Ethernet connection ports with a built‑in Ethernet switch,
supporting RSTP for Class N pathway realization. Follow the procedure below to connect the
system controller to a network and other system devices.
1.
Use Gb-Ethernet cables with RJ45 connectors to connect the system controller to a
network.
2.
Connect to any of the five switch ports of the system controller.
–
The system controller supports Rapid Spanning Tree Protocol (RSTP) for Class N
pathway realization to enable the use of multiple connections simultaneously for
cable redundancy, e.g. to daisy‑chain devices in a loop, with a maximum of
21
devices in a loop.
3.
Port assignments:
–
For general purpose Public Address systems all ports 1‑5 can be used.
–
The PRAESENSA system controller can be set up to work on two completely separate
networks simultaneously for fail‑over redundancy, supporting Dante glitch‑free audio
switching between both networks for continuous and uninterrupted audio
distribution in case of a network failure of one of the networks. In this mode, use
ports 1‑4 for the primary network (with RSTP) and port 5 for the secondary network.
All PRAESENSA devices are on the primary network, the secondary network is only
for network redundancy of Dante devices. Dante glitch‑free audio can only be used
for ancillary functionality.
