Intended Use; Improper Use; Description - Truma MES 350 Module B Gebrauchsanweisung Und Einbauanweisung

Intended use

The Module B cannot be operated as an individual device;
it can only be operated together with a Module A2. As an
expansion of the Module A2, the Module B only serves to
charge 12 V lead accumulators, comprising 6 single cells
(e.g. car battery), with a capacity of 80 Ah – 230 Ah in con-
junction with a Module A2 and a capacity of 120 Ah – 360 Ah
in conjunction with a Module A2 and a connected Module A3.
It can be used universally and is designed for continuous use
or parallel mode. This automatic charger has been designed to
work best with gel, AGM or liquid electrolyte batteries.
The device is designed for installation in caravans.

Improper use

Do not use for 6 V batteries or non-chargeable
batteries!
The device may not be used to charge 6 V lead accumulators.
If batteries with a rated voltage of 6 V are charged with the
device, gassing occurs immediately. An explosive detonating
gas is created.
The device may not be used to charge non-chargeable
batteries and / or nickel-cadmium batteries.
If the device is used to charge these kinds of batteries, the
case can burst explosively.

Description

Module B
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Fig. 1: Module B
1 Fastening bracket
2 Screws for attachment of the clamping space cover
3 Drilled hole for M4 screw as a protective conductor
connection
4 Clamping space cover
5 Edge connector 10-pin
6 Edge connector 4-pin
7 Edge connector 4-pin
8 Drilled hole for connection screw M4
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Module A2 with Module B
When the Module B is connected to the Module A2, the
Module A2 then also assumes the functions of an automatic
charger. This is necessary if the caravan is to be operated
independently and if it is to have its own supply battery
(battery II). Also, thanks to the fitted solar control, the Module
B also offers the option of connecting two solar panels each
of 85 W, an under-voltage battery for the supply battery and
a voltage booster. With an input voltage of between 10 V and
14.5 V from the vehicle battery, the voltage booster controls
the output voltage so that the supply battery always receives
the optimum supply during driving mode. It compensates any
voltage fluctuations and line losses.
It is very easy to connect the Module B to the Module A2.
New cables are required for the supply battery, the solar sys-
tem, the separate master switch and the temperature sensor
(optional). The existing cables for the Module A2 can remain
as they are.
Module B
The Module B is a state-of-the-art product with microprocessor
controlled charging equipment. This technology allows high
performance whilst remaining lightweight and small. Thanks
to the top quality electronics, it works highly efficiently. The
automatic charging process is gentle to the battery and pre-
vents damaging overcharging, which in turn significantly
extends the service life of the battery. Once the battery con-
nections have been made to the Module B and Module A2 is
connected to the mains, Module B is operational.
When the master switch is pressed (key with the LED on
the Panel MES Module A / B or separate switch), a relay in
the Module B switches. This relay switches ON the 12 V
consumers connected to Module A2 (the key shines). When
the master switch is pressed again, this relay switches the
12 V consumers OFF.
The Module B is designed for parallel mode and buffering
mode. 12 V consumers that are connected to Module A2 can
be continuously connected, switched on or disconnected.
Consumers are supplied and the battery charged at the same
time. The consumer current here should be smaller than the
maximum charging current as otherwise the battery will not
charge.
The microprocessor in the Module B automatically
assumes the battery management of the individual
charging current sources.
If the Module B is operated in conjunction with a tempera-
ture sensor for the supply battery, the Module B regulates
the charging current automatically depending on the battery
temperature. This ensures particularly effective and gentle
charging of the battery. If a temperature sensor is not used,
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the Module B regulates the charging process in the same way
as a battery temperature of 20 °C.
The device is designed for operation in an ambient tempera-
ture of up to 35 °C. If the temperature inside the device in-
creases due to a lack of circulating air or due to the fact that
the ambient temperature is too high, the charging current is
automatically reduced gradually.
Mains supply mode
In mains supply mode, the supply battery (battery II) of the
caravan is automatically charged by the Module B and the
12 V consumers are supplied from the supply battery. In con-
junction with a Module A2, the maximum charging current
is 23 A. In conjunction with a Module A2 and a connected
Module A3, the maximum charging current is 36 A. (Charging
reference line, see fig. 3).
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