Bosch PRAESENSA Installation Manual page 65

PRAESENSA
Supervision
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Fault tolerance
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Bosch Security Systems B.V.
Supervision of amplifier operation and all of its connections; faults are reported to the
system controller and logged.
Loudspeaker line integrity supervision without interruption of audio, using end‑of‑line
devices (separately available) for best reliability.
Network link supervision.
Dual OMNEO network connections, supporting Rapid Spanning Tree Protocol (RSTP), for
loop-through connections to adjacent devices.
Dual 48 VDC inputs with polarity reversal protection, each with a full power DC/DC
converter, operating in tandem for redundancy.
Fully independent amplifier channels; the integrated spare channel automatically replaces
a failing channel, with due regard of the actual sound processing settings.
All amplifier channels support two independent loudspeaker groups, A and B, enabling
redundant loudspeaker wiring topologies.
Backup analog audio lifeline input driving the spare amplifier channel to serve all
connected loudspeaker zones in case both network connections, or the amplifier network
interface, would fail.
*Amplifier, 600W 4-channel | PRA-AD604 | en
Installation manual
65
2019.11 | V1.00 |