Bosch Appliances PLE-2MA120-EU Connections and settings, Connecting inputs, DC supply battery

Plena Mixer Amplifier Installation and User Instructions Connections and settings

en 15

4Connections and settings

4.1Connecting inputs

4.1.1DC supply (battery)

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 earthed.

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.

Note

If the backup power system has to comply to the EN54-4 standard or similar standards for backup power and charging speeds, Bosch recommends the PLN-24CH10. The PLN- 24CH10 is a dedicated battery charger and power supply that is fully EN54-4 compliant.

Note

If battery charging is not required, the 0.5 A maximum output current can be used for volume overrides or other purposes instead.

-		+		FUSE
12	VDC		-	+
			12	VDC

figure 4.1: Connecting a DC power supply

Bosch Security Systems 2007-10 PLE-2MA120-EU, PLE-2MA240-EU en