Power supply ground loops
USER MANUAL
5. Solution
5.1. Supply protection box
An external fuse in the GND line solves this problem already. If the current through the supply line is too
high, the fuse will blow. Therefore no damage on the DAQ-system or the sensor may happen.
Image 4: The external fuse in the GND line
In addition the supply protection box provides reverse polarity protection. The current is shorted over
the diode (failure current does not flow through the sensor) and will blow up the fuse.
Image 5: Reverse polarity protection
V20-1 6/12
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