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Bosch Security Systems | 2007-10 | PLE-2MA120-US, PLE-2MA240-US en
Plena Mixer Amplifier | Installation and User Instructions | Connections and settings en | 15
4 Connections and settings
4.1 Connecting inputs
4.1.1 DC supply (battery)
The Plena Mixer Amplifier has a 24 VDC input
(terminal screw). This input can be used in mobile
applications, such as boats where 120 or 230 VAC is not
available or in applications that must continue to
operate in case of a power failure.
When a 24 VDC battery is connected (typically
consisting of two 12 VDC lead-acid batteries in series),
the unit will operate on the supplied DC voltage.
The Plena Mixer Amplifier has as a built in charger,
which charges the connected battery (or batteries if
connected in series). A separate battery charger is,
therefore, not required. The charger charges the battery
with a 0.5 A constant current until the battery voltage
reaches 27.4 VDC. The charger then switches over to
constant voltage charging (also known as float charging).
This means that a battery can be charged at the same
rate it is discharging, and thus full capacity battery can
be assured.
This type of charging is suited for low duty-cycle
applications where a relatively high current or power is
infrequently required.
Caution
The connection cable must have an in-line fuse.
Use the type of fuse shown in the following
figure.
Caution
Make sure the unit is grounded.
Note
If battery charging is not required, the 0.5 A
maximum output current can be used for volume
overrides or other purposes instead.
figure 4.1: Connecting a DC power supply
12 VDC
12 VDC
-
+
-
+
FUSE