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Praesideo 3.5 | Installation and User Instructions | 4 | Amplifiers
8.3.8
Connecting back-up power
Connect the back-up power supply to the back-up
power connector on the back of the amplifier. Refer to
figure 8.13 and figure 8.14.
Control In
Audio In
1
2
3
4
5
6
7
8
1
2
+
– +
–
0
0
Network
Control Out
Spare In
Lsp Out
2
Control Out
1
2
– –
+
+
C NO NC
0V 50V
48V
48V
Battery
48V
+
Non-isolated input
figure 8. 1 3: Connecting power amplifier to ground (1)
Network
1
2
Control In
1
2
3
4
48V
48V
Control Out
Spare In
Lsp Out
Control Out
Spare In
Lsp Out
Control Out
1
3
C
NO NC
0V
50V
C
NO NC
0V
50V
C
NO NC
2
4
Battery
48V
0
+
figure 8. 1 4: Connecting power amplifier to ground (2)
Bosch Security Systems | 2011-02
Mains
115:
100-120V
50-60Hz
T6.3A 250V
230:
220-240V
50-60Hz
T6.3A 250V
Signal Ground
Grounded
Floating
Spare In
Lsp Out
1
Control Out
Spare In
Lsp Out
4
Control Out
Spare In
Lsp Out
3
– –
+
+
– –
+
+
– –
+
+
C NO NC
0V 50V
C NO NC
0V 50V
C NO NC
0V 50V
Class 2
Wiring
Battery
Non-isolated input
15AT
12A
0
Audio In
5
6
7
8
1
2
3
4
0
0
0
0
Spare In
Lsp Out
Control Out
Spare In
Lsp Out
5
7
0V
50V
C
NO NC
0V
50V
6
8
15AT
Mains
48V
Warning
Never ground the positive terminal of the
battery, as this will damage the Praesideo
equipment. If the back-up power supply
(battery) is grounded, always connect the
negative terminal (0) first and the positive
terminal (+) second.
Caution
48V
12A
Risq of electric shock
Do not open
+
Avis
0
Risque de choc electrique.
Ne pas ouvrir
Disconnect in reverse order: disconnect the
positive terminal first and the negative terminal
second. This avoids excessive ground loop
currents.
48V
Warning
For safety reasons you must use an external
circuit breaker. Install in accordance with the
local Electrical and Building Code, e.g. for USA
and Canada in accordance with NEC/CEC and
for Germany in accordance with VDE0108-1.
To reduce the risk of electric shock do not
perform any servicing other than that contained
Battery
48V
Mains
100-240V
in the operating instructions unless you are
0
+
qualified to do so. See section 1.2 Intended
T6.3A H
250V
Caution
audience
Risk of electric shock.
Do not open.
Avis
Risk of electric shock.
Do not open.
If a back-up power supply is used, the PRS-xPxxx
amplifiers can switch to the Power-save mode to reduce
the load on the battery. This mode is not supported by
the LBB4428/00. See section 44.4.
When an amplifier is set to Power-save mode due to a
mains failure, the audio inputs, and control inputs and
outputs are still available for use. An ambient sensing
microphone will continue to operate if connected to the
amplifier for AVC.
en | 143
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