
Hacousto Holland bv
Industrieweg 87
2651BC Berkel & Rodenrijs
4Evac SW6 / SW6-LITE INSTALLATION and USER
GUIDE V04
Author:
TC
Page 15 of 26
5.2.7
Fault detection, backup amplifier function
Input fault
If input monitoring is enabled, then SW6 will measure of 20 kHz tone coming from this input. If the
signal is not detected, input fault is generated.
Backup amplifier function
When both inputs CHA and CHB are enabled and monitored, 4E-SW6 by default supports
automatic backup amplifier function.
If an input fault is detected by SW6 (no signal from amplifier), then main system controller (Compact
500 or Impact Controller) will re-route the highest priority signal transmitted at that moment to the
zones powered by SW6.
Backup amplifier function example: failure of Channel A, EVAC signal transmitted .
In the example above, initially two audio streams were transmitted to output zones:
CHA (high priority - EVAC) -> L1, L2, L6
CHB (low priority - paging) -> L3, L4
L5 idle (no audio transmitted)
As soon as the input failure is detected, SW6 reports input fault and main controller
(source of signal) re-arrange Input-output routing, so that the highest priority signal
takes over the healthy amplifier. All lower priority signals are suspended. After fault
detection, following routing will be applied in the example above:
CHA (no signal) -> no zones connected
CHB (high priority EVAC) -> L1, L2, L6
L3, L4, L5 idle (no audio transmitted)