Compared with other 3D Printer control board, Rumba has one more motor driver and less plug-in part so that it can improve the connectivity and stability. Detailed parameters are as follows.. [Link] power wiring method [Link] power supply dual power supply method As shown in the figure above, you need to connect two sets of power cords to supply power to the motherboard. They are the motherboard power supply and the hot bed power supply. The extra one is the hot bed interface (the wiring in the picture is red positive and black.
There are good wiring diagrams available on the RepRap Wiki's RUMBA page - the wiring for RUMBA+ is nearly identical, and those images are an excellent starting point.. RUMBA+ is an updated version of the RUMBA 3D Printer control board, originally developed by RepRapDiscount. The RUMBA+ update is designed to address several shortcomings with the original design, and improve on the otherwise solid framework it presents.