M-DUINO 21 I/Os PLUS (Optoisolated Output)

M-DUINO 21 I/Os PLUS (Optoisolated Output) — DFRobot — DFR0904

Arduino-based industrial PLC with 21 I/Os, optoisolated output, multiple communication ports, and support for remote programming and module expansion.

Pinout

Logical pinout · physical placement not verified
M-DUINO 21 I/OS PLUS (Arduino IO (21 total)GNDCommunication portsExpansionPower isolated
  • Arduino IO (21 total)
    Type · Signal
  • Communication ports
    Type · Signal
  • Power isolated
    Type · Power
  • GND
    Type · Ground
  • Expansion
    Type · Signal

Start wiring

USB · 5 V · 3.3 V

Verify supply voltage and logic levels before powering up.

Module pins: Power isolated, GND, Arduino I/O (21 total), Communication ports, Expansion. Schematik maps them to your board in the app.

Arduino

76 other options

About 75 boards across every Arduino generation: 5V Uno/Mega/GIGA, 3.3V MKR and Portenta, plus DFRduino and Bluno compatibles. Confirm the voltage rail before stacking any shield.

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