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Revision to Power Wiring

Tony

'''Caution: be sure to get the polarity right!''' The board is not protected against reverse polarity. The positive wire from the power supply goes to the terminal marked + which is the one nearest the stepper motor connector side of the board.
-If you use stranded core wire, '''do not''' tin the ends of the wire, because if you do then the heat generated by the current will cause the solder to flow and the connection will become loose. Preferably, use bootlace ferrules on the end of the wires, as supplied with the DuetWifi and Duet Ethernet.
+If you use stranded core wire, '''do not''' tin the ends of the wire, because if you do then the heat generated by the current will cause the solder to flow and the connection will become loose. Preferably, use bootlace ferrules on the end of the wires, as supplied with the Duet 2 Wifi and Ethernet.
'''Important!''' Re-tighten the terminal block screws after doing the first few prints, and check that they are still tight occasionally after that. The heat generated by the high current carried by the power wires can cause them to creep and make the connection less tight, especially if you used stranded core wire and no ferrules.
== Bed heater power ==
-The Duet boards are designed to power the heated bed (or the solid-state relay controlling it) from the same power supply as they power everything else. The Duet WiFi is able to supply 18A to a heated bed. If you still want to use a second supply to power the bed (still not exceeding the 18A the Duet can sink), it is possible to arrange this; see [[Wiring and hardware differences from RAMPS etc]] for details.
+The Duet boards are designed to power the heated bed (or the solid-state relay controlling it) from the same power supply as they power everything else. The Duet 2 is able to supply 18A to a heated bed. If you still want to use a second supply to power the bed (still not exceeding the 18A the Duet can sink), it is possible to arrange this; see [[Wiring and hardware differences from RAMPS etc]] for details.
== Standby power ==
[image|430|align=center]
-If the main PSU supports an ATX-style PS_ON pin (power supply on when pin is connected to ground), the Duet can enable and disable the main power as needed. Obviously this will not work if the only source of 5V is the 12/24V circuit you are switching; you must either supply USB power or use the 5V in pin from a supply that is not shut down when the 12/24V supply is. On an [https://en.wikipedia.org/wiki/ATX#Power_supply] which provides this function.
+If the main PSU supports an ATX-style PS_ON pin (power supply on when pin is connected to ground), the Duet 2 can enable and disable the main power as needed. Obviously this will not work if the only source of 5V is the 12/24V circuit you are switching; you must either supply USB power or use the 5V in pin from a supply that is not shut down when the 12/24V supply is. On an [https://en.wikipedia.org/wiki/ATX#Power_supply] which provides this function.
=== Controlling the external power supply ===

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