Bosch PLE-1MEXX0-XX Specifications Page 41
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PA and Emergency Sound | Plena Public Address Solutions | 41
PLN‑1LA10 Plena Loop
Amplifier
Features
▶
High power, current driven amplifier
▶
Two microphone/line inputs, one priority input
(100 V)
▶
Selectable frequency range and tone controls
▶
Limiter and automatic gain control (AGC)
▶
Integrates in an EN 54‑16 and EN 60849 compliant
system
The Plena Loop Amplifier is a cost-effective amplifier
designed to drive a wire loop installed in the floor or
ceiling, covering an area of up to 600 m
2
per amplifier.
This solution enables hearing-aid users in the area
enclosed by the wire loop to hear all announcements, or
music. Hearing-aid users can set their devices to the T-
mode setting to receive the signal coming from the loop.
They receive announcements in excellent audio-quality,
without the background noise or reverberations that
normally impair intelligibility for people with hearing
disabilities.
Functions
The loop amplifier can be connected to a mixing
amplifier’s 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 makes it possible to use the Plena Loop
Amplifier in an IEC 60849 compliant system, and to
include the induction loop in the supervised transmission
paths.
For added ease, the loop amplifier is equipped with a
limiter that keeps the output field strength below the
prescribed 100 mA/m. This circuitry can also be set to an
automatic gain control (AGC) that amplifies weak signals
for enhanced intelligibility, while attenuating loud signals.
This ensures that all information is presented at a
comfortable listening level.
The unit has tone controls and a metal loss compensation
circuit to adjust the sound to the program material and
the environment. The controls have locks to prevent
unwanted access after they have been adjusted.
The Plena loop amplifier is stackable (master/slave
configuration) to cover very large areas, and supports low
spillover schemes. Its unique quadrate configuration
provides uniform field strengths even over multiple loops.
Controls and indicators
Front
•
LED power meter
•
Current meter
•
Four LEDS for fault, limiter, AGC, loop integrity
•
Headphones socket
•
Two tone controls
•
Three input volume controls (master and two
channels)
•
On/off switch
Back
•
Metal loss compensation control
•
Supervision switch
•
Voltage selector
•
Frequency range switch
•
AGC/Limiter switch
•
AGC range control
•
VOX/mix switch
•
Pre/post amp switch
•
Two phantom power switches
•
Two Mic/line switches
Interconnections
Back
•
Master input
•
Two slave outputs
•
Audio inputs
•
Priority input
•
Induction loop output
•
Line output
•
Fault output
•
Ground screw
•
Mains socket
Certifications and Approvals
Region Certification
Europe CE
www.boschsecurity.com Bosch Security Systems B.V.
1
- PA and Emergency 1
- PLE‑10M2‑EU Plena Mixer 2
- PLE‑2MAxx0‑EU Plena 5
- PLE‑1MAxx0‑EU Plena 9
- Ordering Information 11
- PLE‑1Pxx0‑EU Plena 12
- Amplifier 12
- Technical Specifications 13
- PLE‑2CS Plena Two-zone 14
- Call Station 14
- PLE‑1CS Plena All‑Call Call 16
- Heavy Duty Call Station 18
- PLE‑1SCS Plena Easy Line 18
- PLE‑WP3S2Z‑EU Wall 20
- PLE‑1MExx0‑xx Plena 22
- Mixer Amplifier 22
- LBB 1925/10 Plena 24
- System Pre-Amplifier 24
- LBB 1941/00 Plena Call 27
- LBB 1946/00 Plena Six 29
- LBB 1950/10 Plena 31
- Tabletop Unidirectional 31
- Condenser Microphone 31
- LBB 1930/20 Plena Power 33
- LBB 1935/20 Plena Power 35
- LBB 1938/20 Plena Power 37
- Parts Included 38
- PLN‑1P1000 Plena Power 39
- PLN‑1LA10 Plena Loop 41
- PLN‑ILR Plena Inductive 43
- Loop Receiver 43
- PLN‑DVDT Plena BGM 44
- PLN‑2AIO120 BGM/Paging 46
- Certifications and Approvals 47
- LBB 1965/00 Plena 49
- Message Manager 49
- LBB 1968/00 Plena Feed 52
- PLN‑6TMW Plena Weekly 54
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