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Connect An Emergency Input Line - Bosch LBB 1920 Installation And Operating Manual

Plena universal pre-amplifier
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Plena Universal Pre-amplifier | Installation and Operating Manual |

4.5 Connect an emergency input line

D i r . O
u t 4
I n s / C
a s c
G N D
+
1
-
2
3
1 -
3
4
5
Figure 4.6
You can use this input for emergency announcements and/or signals. This line is activated when the signal is above
a certain threshold (VOX). When the line is activated it has the highest priority and overrules all input channels.
The emergency line has its own internal volume control and is not affected by the master volume. To set the
emergency volume, refer to §2.3. If you use the emergency input make sure that the internal settings are correct
(refer to §2.2).
Note
The emergency input has a 24 V relay output (screw terminal), which is activated on the VOX of the input. An
additional 24 Vdc output (screw terminal) is available to power external relays.
Bosch Security Systems | 2003-09 | 3922 988 99482en
Dir .O
ut1
I n s / C
1-
3
4
3
5
1
a s c / E
5
4
2
m g ln
1/L ine
I n s / C
a s c O
u t
M
1 -
3
4
5
3 / L i n
e
External settings and connections
Dir .O
ut2
Dir .O
ut3
Dir .O
ut4
Ins /Ca
sc/E
mg ln
Ins /Ca
scO ut
1-
+
3
Ins /Ca
Ma ste
4
2
GND
-
sc
r Lin
e Ou
5
1
t
3
GND
+
Ma ste
r Mic
1
-
2
. Ou t
3
1-
3
4
5
115 V-
230 V-
1-
3
2/L ine
4
1-
App ara
5
3
con nec
tus del
4
ivire d
5
War ning
ted for
Rate
230 V-
This
d inpu
app arat
Pow er
t
us mus
: 25V
t be
eart hed
T0.5
AL 250
A
3/L ine
V
0
L
EM G
4/L ine
Out
R
DC In
DC Out
+24 V-
+24 V-
en | 15

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