PiXtend eIO Hardware Manual
The deviating specifications of the voltage ranges must be observed!
When using external power supplies (for sensors, switches, etc.), PiXtend eIO's GND must
be connected to the GNDs of the other power supplies. We recommend connecting the
ground potentials of all power supplies used at a central point (bridged terminal strip) in
order to avoid ground loops.
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Figure 37: Principle circuit diagram: GND connection
