PiXtend eIO Hardware Manual
Connection Notes
The following diagram illustrates the connection of different loads to the digital outputs and
the connection of power supply to a DO infeed.
For inductive loads, it must be ensured externally that the voltage at the output never
exceeds 40 V. This can be achieved for example by a freewheeling diode (1N4004), as
shown in figure 39.
Inductive loads are DC motors, relays, contactors, solenoids etc.
The ground connections (GND) of external power supplies must be connected directly to
the GND connections on the terminal block.
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Figure 39: Principle circuit diagram: connection of the digital outputs