Coachman Travelmaster 2022, User Manual

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C22M-1
4-30
230V
N3
EN
Descriptions
Page
The living area’s 12 V system is based on “Smart D”, an
advanced electronic system.
The control panel shows current information for the sys -
tem. The control panel’s display is touch-sensitive. Pres -
sing the control panel’s icons (buttons) sends instructions
to the system.
“Smart D” is a BUS system. This means that electrical
functions are controlled by the system’s software. The
software’s electronics are integrated into the control panel
(M).
The system’s software communicates with a number of
outputs and inputs at various points in the motorhome.
The electronic units with inputs and outputs are designa -
ted N1 – N6. (N1 – N5 in certain models.)
Power consumers (lights, pumps, etc.) are connected to
outputs. Thus, the system can start any power consumer
connected to a particular output. (A)
Most switches in the living area are connected to inputs.
The software reads the inputs and, consequently, switch
status. The system implements the action associated with
the switch. (Example A)
Example A:
Turning on a light. Press the switch. From the input, the
software reads that the switch has been activated. The
software commands the output to send power to the light.
The light comes on.
At several points in the motorhome, there are switches
connected traditionally to consumers. Here, the switch
makes or breaks the power circuit between output and
consumer. (Example B)
• With the switch in the off position, the connection is
broken. The software cannot turn the consumer on.
• With the switch in the on position, the software can
control whether the consumer should be on or off.
GENERAL TECHNICAL DESCRIPTION OF THE LIVING AREA’S 12 V SYSTEM
Descriptions – Electrical system
Control panel (M).
The BUS system has electrical inputs and outputs
(N1 – N6) on various units.
The BUS system’s N1 unit is a:
Dometic Smart D 12 V Distribution Box.
The BUS system’s N2 – N6 units are:
Dometic Smart D I/O cards.
Example A
Example B