Connecting the amplifier channels | Bosch Appliances 3.5 specification

Praesideo 3.5 Installation and User Instructions 4 Amplifiers

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8.3.5 Connecting the amplifier channels

8.3.5.1 Introduction

An amplifier channel (see figure 8.4) is a group of outgoing signals that have been processed by the same amplifier unit of the power amplifier. The number of amplifier channels depends on the type of power amplifier (see table 8.3).

table 8.3: Number of amplifier channels

Type	Amplifier channels
PRS-1P500	1

PRS-2P250	2
PRS-4P125	4
LBB4428/00	8

Control Out		Spare In	Lsp Out
Control Out
C	NO NC	0V	50V
1			9
			9

figure 8.4: Amplifier channel connector

table 8.4: Amplifier channel connector details

Pin	Description
1, 2, 3	Control outputs contacts. See
	section 8.3.5.4.
4, 8	Spare amplifier. See section 8.3.5.5.
5, 9	Loudspeaker line. See section
	8.3.5.2.
6, 7	Fixed 50 V line. See section 8.3.5.3.

Caution

To prevent the hazard of electric shocks, switch off the power amplifiers and disconnect the back up power supplies from the power amplifiers before connecting loudspeaker lines and spare amplifier connections.

Caution

After connecting wires to the amplifier channel connectors, install the plastic safety bracket. The plastic safety bracket makes sure that the amplifier channel connectors cannot be touched.

Bosch Security Systems 2011-02

3.5 specifications

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Bosch Appliances 3.5 manual Connecting the amplifier channels, Number of amplifier channels

Models: 3.5