Connect your power supply to the Power In terminal.
Be sure to observe correct polarity when making the connections. The picture is of a Duet 2 WiFi/Ethernet; check polarity if wiring Duet 2 Maestro, Duex 2/5 and Duet 3.
WARNING: It is HIGHLY recommended to use the included ferrules, by crimping them to the wires before putting the wires in the terminal block. Failure to do so could allow the wires to creep over time, become loose, and could possibly short circuit and start a fire.
Do not tin (add solder to) these wires.
Be sure not to twist the terminal block while tightening the screws. It can help to hold the terminal block while tightening.
Check the screws after a few days/week of operation to ensure they are still snug.
The gauge of wire should be appropriate to the current that the Duet will draw. This depends on a number of factors, however at its maximum this will be dominated by the 15A for the bed heater. The red and black ferrules provided are 1.0mm^2 and 1.5mm^2 respectively. This relates to 17 and 15 AWG respectively.
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