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MESSTEC Power Converter GmbH
Operating Manual
TEC Controller
Document: 10100920OM
Revision: 1.1
Date: 10.10.2019
Page 7/71
2. First steps
– Getting started
Take care of correct supply voltage wiring (X5). The TEC-Controller has no in-
verse polarity protection. Wrong polarity may damage the unit and will void the
warranty.
Take care of short supply voltage wiring (X5). Long cables or routing along
electromagnetic interference sources
will lead to instability and unreliable
operating behavior.
Do not operate a Peltier element in the range of its maximum power limit or
cooling capacity. This will fail due to high power loss and bad efficiency.
It is recommended to select a Peltier element whose cooling capacity is
sufficient at an operating voltage (current) of half of the maximum operating
voltage (current).
Orientation of the Peltier Element in the mechanical setup:
COLD side towards diode or heatspreader and temperature sensor
HOT side towards heatsink
Never use any of the gold plated contact pads as mounting holes
for mechanical fixture (see red arrows). These contact pads are connected
to internal power supplies and control signals and it is mandatory to
keep them strictly unconnected in any case.
Not following this warning results in damage of internal electronics
and loss of any warranty claims.
Fig. 3: Mounting holes (green arrows) - Contact pads (red arrows)
Appropriate mounting holes are located in the corners of the TEC-Controller
board (see green arrows in figure 3). The mounting holes include the attached
base plate.
The base plate is not left electrically floating. It is connected to internal GND
(corresponds to power supply minus) via resistor of 10 kΩ.