Power amplifier Installation | en 25
Bosch Security Systems B.V.
Installation manual
2023-01 | V02 | F.01U.402.247
5.2.4 Ready/Fault relay
The Ready/Fault relay is a potential free relay toggle for READY or FAULT indication. This
allows the amplifier to notify an external device or indicator that the amplifier status is either
“RDY” (all is ok) or “FLT” (fault) and may not be functioning correctly. The next table explains
the relay setting for the different operation and error modes.
READY (RDY) / FAULT (FLT) Description
RDY Amp active, all channels on
FLT APD is activated or device is not on
FLT One or more channels in Protect state
FLT Internal error, e.g. fan blocked
*) RDY/FLT: Indicates the closed contact.
Figure A shows the FLT (fault) condition, figure B shows the RDY (all is ok) condition.
Refer to
– Indicators, controls and settings, page 16
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