Operation; Stand-Alone Mode - Bosch PAVIRO PVA-2P500 User Manual

22 en | Operation
8

Operation

Fault monitoring
The following functions of the power amplifier can be monitored:
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Whenever a fault occurs in the power amplifier, this is always indicated by means of the
Combined fault warning indicator light lighting up. IRIS-Net can be used to configure which
power amplifier fault types are to be displayed. The monitoring of functions that are not being
used (e.g. DC input) must be deactivated, otherwise a permanent fault is displayed.
Standby mode
In standby mode the power consumption of the PVA-2P500 is below 2 W (AC or DC power
supply). Following functions are available in standby mode:
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The standby mode is activated or deactivated via CAN bus. The standby mode will be
deactivated automatically if the CAN bus is disconnected or the CAN address is set to 0

(stand-alone mode).

8.1 Stand-alone mode
Audio signals
In stand-alone mode (without CAN connection to a controller, e.g. CAN address set to 0) the
audio input signal L1 (or L2) is mixed with audio input 4, amplified with 36 dB and provided
by audio output 1 (or 2).
Ground fault monitoring
The VDE specification DIN VDE 0800 must be observed when setting up and operating 100-volt
speaker systems. Particularly with 100-volt speaker systems that are used for alarm purposes,
all protective measures must be designed for measuring class 3. The integrated ground fault
monitoring function in the power amplifier allows the insulation of the ungrounded speaker
line network to be monitored in stand-alone mode. Any ground fault (e.g. R ≤ 50kΩ) that
occurs is an indication of either cable damage, which means that a line interruption may occur
in the near future, or a wiring fault, which can result in malfunctions. A ground fault that has
been present for at least five seconds is indicated on the front panel by the Ground fault
indicator light lighting up yellow. The Ground fault indicator light lights up until the power
supply to the output stage is disconnected or the error is reset by pressing the Recessed
button.
To test the ground fault monitoring function, use a 22 kOhm resistor (the power amplifier
must not be in STANDBY mode during the testing process). If the resistance is switched from
a terminal of the power output socket to protective ground for approx. five seconds, the
Ground fault indicator light must light. If the resistance is greater than 100 kOhms and the
2023-03 | 08 | F01U306898
Mains under-voltage
Battery under-voltage
Excessive temperature
Overload
Output voltage
Output current
Ground fault (in stand-alone mode only)
Pilot tone monitoring when used in combination with PVA-4CR12 and PVA-4R24
Monitoring of the microprocessor
CAN BUS connection
Remote control via CAN bus
Supervision of the AC power input
Supervision of the DC power input
User manual
PAVIRO Amplifier
Bosch Security Systems, B.V.