Praesideo 3.5 Installation and User Instructions 4 Amplifiers

en 174

10.3.6 Connecting the local audio input

The basic amplifiers have a local audio input per

 

 

 

Channel 2

 

 

Channel 1

 

 

 

 

channel for a local signal source. This input has a low

 

 

Unbalanced input

 

 

Unbalanced input

priority and is controlled by the multi channel interface.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The local input signal is suppressed by any signal from

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the Praesideo system to that channel (zone).

 

 

 

 

 

 

 

 

 

 

 

 

 

On the PRS-1B500 and PRS-2B250, the local audio

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

input can be set to balanced or stereo unbalanced. This

 

 

 

 

 

 

 

 

 

 

 

 

 

feature is not available on the PRS-4B125 and the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Channel 2

 

 

Channel 1

PRS-8B060. The input has line level sensitivity,

 

 

 

 

 

 

Balanced input

 

 

Balanced input

controlled with a sensitivity preset above the connector.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

See figure 10.5 for details about the local audio input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

socket and preset.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

table 10.4: Audio input socket details

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Socket

Balanced

Unbalanced

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

 

+ Signal

Right

 

 

figure 10.14: Jumper setting

 

 

 

 

0

 

Ground

Ground

 

 

 

 

 

 

 

 

 

 

 

 

 

-

 

- Signal

Left

 

10.3.6.2 Stereo unbalanced input

 

 

 

 

 

 

 

 

 

On the PRS-1B500 and PRS-2B250, it is possible to

 

 

 

 

 

change the balanced input into an unbalanced mixing

 

 

 

 

 

Note

 

 

 

stereo input for a e.g. CD player. Connect the right and

 

The wiring to the local audio inputs must be less

 

left channels according to table 10.4. Both channels are

 

than 3m in length.

 

 

added together into a mono signal. See figure 10.14 for

 

 

 

 

 

the jumper settings. Use a pair of tweezers to change the

 

 

 

 

10.3.6.1 Balanced inputs

 

 

jumper settings as the jumpers are difficult to reach.

The jumper settings are set to balanced as default. See

 

10.3.6.3 Sensitivity control

 

 

 

 

table 10.4 for connections and figure 10.13 for the

 

 

 

 

 

 

Use the recessed sensitivity control to adjust the input

jumper locations.

 

 

 

 

 

 

 

signal from a local audio device.

 

 

 

 

 

 

 

 

Use a small screw driver to adjust the potentiometer.

2

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.3.7 Connecting back-up power

Connect the back-up supply to the back-up power

connector on the back of the basic amplifier. Refer to

figure 10.15.

1

1

figure 10.13: Jumper location

Bosch Security Systems 2011-02

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Bosch Appliances 3.5 manual Connecting the local audio input
Page 173 Page 175

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