PRAESENSA *Amplifier, 600W 4-channel | PRA-AD604 | en 65
Bosch Security Systems B.V. Installation manual 2019.11 | V1.00 |
Supervision
– 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.
Fault tolerance
– Dual OMNEO network connections, supporting Rapid Spanning Tree Protocol (RSTP), for
loop-through connections to adjacent devices.
– Dual 48VDC 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.
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