14
en | External connections
PLENA power amplifiers
2018.11 | V1.2 | LBB193x/x0
Installation and operation manual
Bosch Security Systems B.V.
6.5
Low impedance loudspeakers
Connect low impedance loudspeakers to the 8
Ohm/0 terminals. This output can deliver the
rated output power into an 8
Ohm load. Connect multiple loudspeakers in a series/parallel-
arrangement to make the combined impedance 8
Ohm or higher. Check the loudspeaker
polarity for in‑phase connection.
100V
0
1 00V
0
Priority C
ontrolled
O utput
O ff On
24V DC
In
Apparatu
s delivere
d
connecto
red for 23
0V~
Main Pow
er
B attery
Input
Fault Re
lays' Outp
ut
NO C OM
NC
O ff On
NO C OM
NC NO
C O M NC
Input 1P
riority
Loopthro
ugh 1
Input 2P
rogram
Loopthro
ugh 2
Input 1P
riority
2...24V-
Input 1
0V- Inpu
t 2
Input 2E
nable
2..24V- E
nable
0V- Mute
100V
0
Slave In
put 100V
+
+
-
-
100V
0
70V
0
8ohm
100V/70V
Selection
(12A)
PriorityO
nly
0
0
No Priorit
y
Priority
F7
0
1
F
7
0
2
B attery
Power
Detection
Pilot-tone
Detector
230V~
240V~
Design
& Quality
The Neth
erlands
LBB 1938
/10
NL-4827
HG -10
Plena 480
W Power
Amplifier
Max. outp
ut power
720W
R ated ou
tput pow
er 180W
230V~,50
/60Hz
S /N.
8900 193
81001
A035413
M
a
d
e
in
C
h
in
a
N6 63
R ated inp
ut
Power :
1600V
A
Input 1
P riority
S lave In
put
100V
Input 2
E nable
100V
0
100V
70V
0
0
8
Direct O
utput
Input
Input
Input 2-P
rogram
Input 1-P
riority
2..24V
Default
O ff
G ND 2..2
4V
Default
O n
G ND
Priority Only
No Priority
100V
0
100V
0
Priority Controlled Output 24V DCIn
1 0 0 V
7 0 V
0
0
8
D ire ct O utput
Priority Only
No Priority
70 V
100 V
8 Ohm
8 Ohm
8 Ohm
8 Ohm
8 Ohm
8 Ohm
4 Ohm
4 Ohm
Figure
6.4: Priority input and control terminals
