Specifications

Bosch Security Systems | 2007-08 | 9922 141 50672en
Plena Loop Amplifier | Installation and User Instructions | External Connections en | 21
4 External connections
4.1 Induction loops
Connect the induction loops to the rear of the loop
amplifier (refer to figure 4.1). Always twist wires that run
parallel and close to each other to avoid additional and
undesired inductions.
4.2 Audio inputs
You can connect audio sources to the audio inputs of
the loop amplifier. For example, you can connect a
power amplifier and a microphone (refer to figure 4.2).
figure 4.1: Induction loop, connection
table 4.1: Induction loop, details
Number of connections:
1x screw terminal
Location:
Rear side
Current:
max. 10 A peak, max. 6 A continuous
Induction loop DC resistance:
0.5 to 3 Ω
Induction loop area:
max. 600m
2
@ 100 mA
RMS
/m
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figure 4.2: Audio inputs, connection
table 4.2: Audio inputs, details
Number of connections:
2x XLR sockets
Location:
Rear side
Sensitivity:
Switchable, 1 mV/1 V
Impedance:
>1 kΩ
Dynamic range:
100 dB
Signal-to-noise ratio:
63 dB @ max. volume
75 dB @ min. volume/mute
Headroom:
25 dB
Phantom power:
Switchable, 16 V
VOX functionality:
Switchable, input 1 mutes input 2
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