Note: It is recommended to use I/O port #7 for the Bltouch, but you can also use #4 or #5.

Optical End Stop

Duet 3 Pin

V

3.3v

S

io0.in

G

GND

End Stops are to be connected to the Inputs and Output Ports of the Duet 3 The Corresponding I/O pin needs to be selected. Select [ioX.in] since these sensor are Active High no need for pull up resistor (Sensor send 3.3V to I/O when triggered.)