Bosch PVA-4CR12, Руководство по эксплуатации

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Plena EOL
The Plena end-of-line boards can be used for permanent supervision on not active and active
speaker lines. The PLN-1EOL module can be used e.g. for speaker lines with permanent
background music or if passive volume controls are used.
Plena end-of-line boards PLN-1EOL monitor the presence of a pilot tone on a loudspeaker line.
The board connects at the end of a loudspeaker line and detects the pilot tone signal. This
signal is always present on the line: when back ground music (BGM) is playing, when a call is
in progress, and when no signal is present. The pilot tone is inaudible and at a very low level
(e.g. -20 dB). When the pilot tone signal is present, an LED lights up, and a contact on the
board is closed. When the pilot tone fails, the contact opens, and the LED goes off. If mounted
at the end of the loudspeaker line, this applies to the integrity of the whole line. Presence of
the pilot tone signal does not depend on the number of loudspeakers on the line, the load on
the line, or the line capacitance. The contact can be used to detect and report faults on a
loudspeaker line.
Several EOL boards can be daisy-chained to a single fault input. This allows a loudspeaker line
with several branches to be monitored. Since the background music also includes a pilot tone
signal, there is no need to interrupt background music.
Please refer to the system manual for details about installation and configuration.
Pilot tone
This device includes an internal, configurable pilot tone generator and signal amplifier, which
can be switched to the speaker zones. The pilot tone generator is configured using the IRIS-
Net software.
Parameter Value/Range Default setting (IRIS-
Net)
Generator status On/Off Off
Signal frequency 18000–21500 Hz 21000 Hz
Signal amplitude (depends on load) 1–10 V 8 V
Notice!
Under certain conditions (e.g. high signal level or loudspeakers with high sensitivity in the
high frequency range) it may be possible that people can hear the pilot tone. In this case,
increase the frequency of the pilot tone.
8.1.3
8.2
PAVIRO Controller Operation | en 39
Operation manual 08-May-2017 | 04 | F01U306900