Bosch PLN-1LA10 Bedienungsanleitung PDF herunterladen

Communications Systems | PLN‑1LA10 Plena Loop Amplifier

PLN‑1LA10 Plena Loop Amplifier

www.boschsecurity.com

u High power, current driven amplifier

u Two microphone/line inputs, one priority input

(100 V)

u Selectable frequency range and tone controls

u Limiter and automatic gain control (AGC)

u 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

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

1 2 3

Inhaltsverzeichnis

Seite 1 - • Two tone controls

Communications Systems | PLN‑1LA10 Plena Loop AmplifierPLN‑1LA10 Plena Loop Amplifier www.boschsecurity.com u High power, current driven amplifieru

Seite 2

• Three input volume controls (master and twochannels)• On/off switchBack• Metal loss compensation control• Supervision switch• Voltage selector• Freq

Seite 3 - PLN-1LA10

Nominal level 1 VImpedance 200 ohmLoop output Connector ScrewSlave output (for master input of other PLN-1LA10)Connector 1/4”TS jack 0° to 90°Fault R

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Bosch PLN-1LA10 Bedienungsanleitung

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Inhaltsverzeichnis

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