Bosch Appliances 3.5 Connecting the local audio input, Connecting back-uppower, 14 Jumper setting

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