Bosch LBB1935/20 Manuel d'utilisateur Page 12

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Bosch Security Systems | 2006-11 | 9922 141 50751en
Plena Power Amplifier | Installation and User Instructions | Amplifiers en | 12
3.4 Installation
The power amplifier is suitable for table-top and 19-inch
rack-mounting installation. Two brackets for rack-
mounting are supplied. See figure 3.5 for installation
details.
The power amplifier has an internal fan regulated to
keep the temperature inside the unit within the safe
operating condition.
3.5 External connections
3.5.1 Connect the back-up power
supply
The power amplifier has a 24 Vdc input (8) screw
terminal to connect a back-up power supply. You must
connect an earth (9) to the unit to increase the electrical
stability of the system.
figure 3.5: Brackets for rack-mounting
0dB
-6 dB
-2
0
d
B
Pl
e
n
a
Boos
ter
A
mp
l
if
ier
figure 3.6: Back-up power supply
1
0
0V 0
10
0V 0
Prio
r
ity
C
ontrol
l
ed O
u
tp
u
t
24V
D
C
In
Apparatus
de
live
re
d
c
on
nec
tored
f
or 2
3
0V
~
M
ain P
ower
B
att
er
y
t
e
la
y
s' Output
NC
Of
f
O
n
NO
C
O
M
NC
N
O
C
O
M
N
C
1
0
0
V
0
7
0
V
0
8
ohm
1
0
0
V
/7
0
V
S
el
e
ct
i
o
n
(1
2
A
)
P
r
i
o
r
i
t
y
O
nl
y
0
0
N
o
P
r
i
o
r
i
t
y
P
ri
o
r
i
t
y
F70
1
F
702
Batter
y
Pow
e
r
Detectio
n
23
0V~
24
0
V~
R
at
e
di
npu
t
P
ow
e
r
: 160
0VA
100V
70V
00
8
Dire
c
tO
utpu
t
1
00V
0
1
0
0V
0
P
rior
i
t
y
C
o
n
t
r
o
l
l
e
d
O
ut
put
O
ff
O
n
2
4
VD
C
I
n
A
p
p
a
ra
t
u
s
d
e
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i
v
e
r
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d
c
o
n
n
e
c
t
o
re
d
f
o
r23
0
V
~
Ma
i
n
P
o
we
r
B
a
tt
e
r
y
I
n
p
u
t
Faul
t
R
e
l
ays'
O
u
t
p
ut
NO
C
O
M
N
C
O
f
f
O
n
N
O
C
O
M
N
C
N
O
C
O
M
N
C
I
n
p
u
t
1
P
r
i
o
r
i
t
y
L
o
o
p
t
h
r
o
u
g
h
1
I
n
p
u
t
2
P
r
o
g
r
a
m
L
o
o
p
t
h
r
o
u
g
h
2
I
n
p
u
t
1
P
r
i
o
r
i
t
y
2
.
.
.
2
4
V
-
I
n
p
ut
1
0
V-
I
n
p
u
t
2
I
n
p
u
t
2
E
n
a
b
l
e
2
.
.
2
4
V
-
E
n
a
b
l
e
0
V
-
M
u
t
e
1
00
V
0
S
l
a
v
e
I
n
p
u
t
1
0
0
V
+
+
-
-
1
0
0
V
0
7
0
V
0
8
o
hm
1
0
0
V
/
7
0
V
Se
l
e
ct
i
o
n
(
1
2
A
)
Pr
i
o
r
i
t
y
O
n
l
y
0
0
N
o
Pr
i
o
r
i
t
y
P
r
i
o
r
i
t
y
F
7
0
1
F
7
0
2
B
a
t
t
e
r
y
P
ow
e
r
D
et
e
c
t
i
on
Pi
lot
-
t
o
n
e
D
e
t
e
ct
or
2
3
0
V~
2
4
0
V~
D
es
i
g
n
&
Qu
a
l
i
ty
T
he
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et
he
r
l
a
n
d
s
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B
B
1
9
3
8
/
1
0
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L
-
48
2
7
H
G
-
1
0
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l
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n
a
4
8
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o
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t
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W
2
3
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~
,
5
0
/
6
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z
S
/
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.
8
9
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3
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54
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63
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o
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ir
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12 VDC
12 VDC
-
+
-
+
9
8
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