Intended Use; Target Group; Technical Description - NDS Dometic SMART-IN SM400-12 Operating Manual

5 Intended use

The device is intended to supply 230 V to connected appliances generated from 12 V or 24 V input voltage. The de-
vice is designed to be used in motorhomes, campervans and coaches.
The model line includes two types of devices:
• The SM400-12, SM600-12, SM600-24, SM1000-12 and SM1500-12 models are inverters with modified sinu-
soidal wave output.
• The SP400-12 , SP600-12, SP600-24, SP1000-12, SP1500-12, SP1500-24, SP3000-12 and SP3000-24 models
are inverters with pure sinusoidal wave output.
The SP1000I-12, SP1500I-12 and SP2000I-12 models are featuring an integrated priority function (IVT) and a fuse-pro-
tected input (IEC) socket for the external power supply connection.
This product is only suitable for the intended purpose and application in accordance with these instructions.
This manual provides information that is necessary for proper installation and/or operation of the product. Poor in-
stallation and/or improper operating or maintenance will result in unsatisfactory performance and a possible failure.
The manufacturer accepts no liability for any injury or damage to the product resulting from:
• Incorrect assembly or connection, including excess voltage
• Incorrect maintenance or use of spare parts other than original spare parts provided by the manufacturer
• Alterations to the product without express permission from the manufacturer
• Use for purposes other than those described in this manual
Dometic reserves the right to change product appearance and product specifications.

6 Target group

The electrical power supply must be connected by a qualified electrician who has demonstrated skill and
knowledge related to the construction and operation of electrical equipment and installations, and who
is familiar with the applicable regulations of the country in which the equipment is to be installed and/or
used, and has received safety training to identify and avoid the hazards involved.

7 Technical description

The device has two main circuit stages to convert the 12 V DC or 24 V DC input voltage to AC output voltage. The
first stage consists of an isolated high frequency DC/DC converter to convert the 12 V DC or 24 V DC input voltage
to an output voltage up to 400 V DC. The final stage consists of a H-bridge that converts the DC high voltage bus to
230 V AC voltage.
The device has the following main features:
• Low consumption.
• Galvanically isolated input and output for increased safety.
• Temperature-controlled fan speed for quiet operation.
• Integrated priority switch between external mains network and the battery.
• Ready for On/Off remote control.
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