Bosch PAVIRO PVA-4R24 - Plena EOL

26 en | Operation PAVIRO Router
2022-11 | 07 | F01U306901
User manual
Bosch Security Systems, B.V.
For communication between the master and the slave modules, the EOL slave modules must
be connected to ground. The shielding on the speaker cable, a free wire in the speaker cable,
or any other available ground point – such as the safety ground of the power supply system –
can be used for this purpose. The resistance R
G
between an output line of the amplifier and
ground must be at least 1.5MΩ. The capacity C
G
between an output line of the device and the
ground must not be greater than 400nF.
Figure8.1: Circuit diagram (R
G
and C
G
are caused by the loudspeaker installation, e.g. wire type, length)
EOL monitoring function setup
Connect the EOL slave modules to the end of the speaker line. Set the desired address at the
DIP switches ➊. For details please refer to the installation note of the PVA-1WEOL.
2
4
3
2
1
8.1.3 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.