Table of Contents
Advertisement
Praesideo 3.5 | Installation and User Instructions | 4 | Amplifiers
8.3
Connections
8.3.1 Introduction
This section gives an overview of typical system
connections using the power amplifier.
•
Connecting the mains (see section 8.3.2).
•
Connecting the network (see section 8.3.3).
•
Connecting to ground (see section 8.3.4).
•
Connecting the amplifier channels (see
section 8.3.5).
•
Connecting audio inputs (see section 8.3.6).
•
Connecting control inputs (see section 8.3.7).
Connecting back-up power supply (see section 8.3.8)
8.3.2 Connecting the mains
Proceed as follows to connect the power amplifier to the
mains:
1 Put the correct type of fuse in the power amplifier
(see table 8.1 and table 8.2).
table 8. 1 : Voltage selector and fuse (PRS-xPxxx)
Selector
Mains voltage
V(AC)
115
100 - 120
230
220 - 240
table 8.2: Voltage range and fuse (LBB4428/00)
Voltage range
100 - 240 V(AC)
2 Connect the mains cord to the power amplifier.
3 Connect the mains cord to a locally approved mains
outlet.
8.3.3 Connecting the network
Connect the power amplifier to the Praesideo system
using the system bus connectors and LBB4416 network
cables. Both connectors are interchangeable.
Bosch Security Systems | 2011-02
Fuse
T6.3A H 250V
(IEC 60127 or UL 248)
T6.3A H 250V
(IEC 60127)
Fuse
T6.3A H 250V
(IEC 60127 or UL 248)
8.3.4 Ground connection
LBB4428/00 only: A ground jumper can connect the
signal ground to the safety ground. This jumper is X3 on
the printed circuit board. Set the jumper to connect pins
2 and 3 to connect signal ground to the safety ground.
Set the jumper to connect pins 1 and 2 to isolate the
signal ground.
The manufacturers setting is as a floating ground with
the jumper connecting pins 1 and 2. If the audio line or
microphone input of the amplifier is used and the
connected audio source is not grounded, the jumper can
be connected between pins 2 and 3 to reduce the
susceptibility to external RF disturbances. If the audio
source already has the signal ground connected to a
safety ground, leave the jumper connected to pins 1 and
2 to avoid ground loops that can be a source of hum.
figure 8.3: Ground connector
For the PRS-1P500, PRS-2P250 and PRS-4P125: With
the rear switch (13 in fig 8.2) the signal ground can be
connected to safety ground.
Warning
To reduce the risk of electric shock do not
perform any servicing other than that contained
in the operating instructions unless you are
qualified to do so. See section 1.2 Intended
audience.
en | 136
3
2
1
Advertisement
Table of Contents
