loop amplifier can be connected to a mixing amplifiers
line level output, or it can accept up to two microphone/line
signals directly. A 100 V priority input is available for uplink
to a voice alarm system. This input can be monitored for the
presence of a pilot tone. The built-in supervision monitors
all key functions of the loop amplifier, and the fault state
is available on a fail-safe relay. This means it is possible
to use the Plena Loop Amplifier in an IEC 60849 compliant system
and include the induction loop in the supervised transmission
added ease of use the Plena Loop amplifier is fitted with
a limiter to limit the output field strength to the prescribed
100 mA/m. This circuitry can also be set to function as an
Automatic Gain Control (AGC), so those soft signals are boosted
for intelligibility while loud signals are attenuated so that
all information is presented at a comfortable listening level.
adjust the sound to the program material and the environment,
tone controls and a metal loss compensation circuit is available.
After installation the controls can be locked to prevent unwanted
though one Loop Amplifier can cover up to 600 m2, the Plena
Loop Amplifier is stackable (master/slave configuration),
to cover very large areas. Also, low spill schemes are supported.
Its unique quadrate configuration provides uniform field strengths
over multiple loops.
1 PLN-1LA10 Loop amplifier
1 Mounting brackets
1 Power cord
1 Plena CD
EMC emission acc. to EN 55103-1
EMC immunity acc. to EN 55103-2
Safety acc. to EN 60065
Induction Loop Systems Acc. to EN 60118-4
Acc. to IEC118-4