Device Front / Connections; 12 V Outputs; Consumer; Heating And Immediate Light - Truma EM 16 IU Mode D'emploi / Instructions De Montage

Device front / connections

1 2
Fig. 4: Device front / connections
1 230 V input
2 230 V output
3 Potential equalisation
4 12 V output consumer
5 Refrigerator absorber
changeover switch – compressor
6 AGM (OPTIMA® YT S) / gel battery changeover switch –
liquid electrolyte battery
7 Connection for temperature sensor
8 12 V output consumer
9 Connection panel (e.g. Panel EM LED / Panel EM Digital)
10 12 V battery input
See connection section for more details!
12 V outputs

Consumer

The output to the consumers (fig. 4, pos. 4 and 8, contact 1 to
3 and 7 to 9) only carry +12 V, if the user relay has switched
on. The consumer relay only switches on if +12 V control volt-
age is applied to contact no. 4 of the 7 pole plug. User circuits
1 / 7 and 2 / 8 are each protected with a 10 A fuse, and user
circuits 3 / 9 are protected with a 15 A fuse.

Heating and immediate light

Heating and immediate light are supplied independently of the
consumer relay. They are connected to the permanent positive
(contact 4 and 10) and protected with a 10 A fuse.

Water pump

The freshwater pump (contact 5) is supplied via the pump
relay. It is protected with a 5 A fuse. This electrical circuit is
controlled from your panel via the contact no. 7 of the 7-pin
connector (fig. 4, Pos. 9).
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Refrigerator absorber operation

Changeover switch (fig. 4, pos. 5) in A – Absorber operation
position. When the engine is running, the refrigerator is sup-
plied with power via the generator of the vehicle. After the
engine is switched off, the refrigerator relay disconnects the
refrigerator from the supply battery. The control action is via
the cable from the D+ of the generator. Thus, operating the
refrigerator at 12 V is only possible during journeys. When the
vehicle is parked, the refrigerator can only be run on gas or
mains voltage. This prevents the supply battery running down.
This circuit (contact 6) is protected by a 15 A fuse.

Refrigerator compressor operation

Changeover switch (fig. 4, pos. 5) in C – compressor operation
position. The refrigerator is supplied via the permanent posi-
tive when the main switch is turned on at the control panel.

Temperature sensor

If the power supply is operated together with a temperature
sensor (picture 4, Pos. 7) for the supply battery (battery II), the
power supply regulates the charging voltage automatically
depending on the temperature of the battery. This ensures a
particularly effective and gentle charging process for the bat-
tery. When not using a temperature sensor, the power supply
controls the charging process as if the battery tem-perature
was 20 °C. See also section on Charging process and Techni-
cal data.

Battery changeover switch

This switch (picture 4, Pos. 6) is used to set the power supply
for the type of battery that is used e.g. AGM / gel-battery or
liquid electrolyte battery (L). This affects the charging in the
post charging phase. See also section on Charging process
and Technical data.
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