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Editing Step 16 —

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The expansion header is to connect the Duet to a Duex 2 or Duex 5 expansion board.

The Duex 2 and Duex 5 expansion is an available add-on which offers additional stepper motor drivers, heater outputs, fan headers, endstop inputs, additional thermistor inputs, support for additional Temperature Daughterboards, and more.

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