Produced by BIGTREETECH
8
2
MOTHERBOARD WIRING
Note: The octopus-pro packs a ton of features which necessitates many
components and connectors. Given the component and connector density it
was not possible to include the silk screen for connector labels on the top. We
recommend that you snap a picture of the bottom of the board before starting
the installation so that you have a label reference on hand. If you forget to do
so then you can always make use of the PINS.pdf file available on our
2.1 P
OWER WIRING
The octopus pro provides three separate power inputs: motherboard power, motor power,
and bed heater power. This allows a user to use several power supplies with common
grounds in order to ensure that they are able to provide the required power to each part of
their system. The motherboard power is regulated using a number of switch-mode and low
dropout power supplies to provide the supply rails of 12V, 5V and 3.3V.
The 12V, 5V and 3.3V rails are made available via various pins on the motherboard.
Consult the PINS.pdf document to find a breakout header if you plan to use one of these
supply rails. Take note that the 12V rail can supply up to 4A, the 5V up to 8A and the 3.3V
up to 1A however, in order to prevent overloading the rails it is not recommended to load
them to their maximum capacity since there are already various components on the
motherboard which also take their supply from them.
Power wiring is as shown below (look on the underside of your board to quickly identify the
purpose of each input if the pins file is not on hand). The positive (red) wire from the power
supply goes to the terminal marked +. The negative (black) wire from the power supply
goes to the terminal marked -. The polarity (+ and -) is also silk screened onto the
underside of the board.
Note: DO NOT alter the board wiring with the power on and be sure to get the
polarity correct otherwise you can damage the motherboard.