Download Bosch LBB 1920 Operating instructions

Plena Universal Pre-amplifier | Installation and Operating Manual | External settings and connections
4
en | 12
External settings and connections
ust be
earthe
d
Rated
Power input
T0.5 : 100VA
AL 25
0V
ppara
conn tus deliv
ected
ire
for 2 d
30V-
L
R
EMG
OUT
DC
IN D
C
OUT
Dir.O
ut1
Dir.O
ut2
Dir.O
ut3
Dir.O
14
3
5
ut4
Ins/Ca
sc/Em
gln
3
1
5
2
4
Ins/Ca
scOut
+24V
-
14
1/Lin
1
+24V
-
+
3
5
2
3
Ins/Ca
sc
GND
1
GND
1
e
-
Maste
r Line
Out
Maste
r Mic.
+
2
3
14
Line1
Out
3
5
2/Lin
e
115V-
14
2
3
5
14
3/Lin
e
Line2
3
5
Warnin
This
3
Line3
0
4/Lin
g
apparat
us must
be earthed
Rated
input
Power
:
T0.5AL 100VA
250V
230V-
Appar
conneatus delivir
cted
ed
for 230V-
L
e
4
EMG
+
12 V
D
Line
R
OUT
DC
4
IN DC
OUT
+24V+24V-
-
F
+
-
C
12 V
D
F = 1.5A
C
Figure 4.1
4.1 Connect the DC supply (battery)
The universal pre-amplifier has a 24 Vdc input (terminal screw), which you can use to connect a back up power
supply, e.g. batteries. You can earth the unit to increase the electrical stability of the system. The unit is protected
against reversal of the battery polarity.
Caution
The connection cable must have an in-line fuse. Use the type of fuse as mentioned in the illustration.
Bosch Security Systems | 2003-09 | 3922 988 99482en