Crowd Supply STEP400 Electromagnetic Brake Board is a control board for stepper motors with an electromagnetic brake that is easy to connect to the mainboard. An electromagnetic brake is only unlocked when the power is energized, so it can safely hold the load when the system shuts down, or the power supply is unexpectedly cut off. To use the Crowd Supply STEP400 Electromagnetic Brake Board, a motor with an electromagnetic brake is required and is not included. https://elecena.pl/product/18203916/electromagnetic-brake-board 2021-05-01 https://elecena.pl/product/18203916/electromagnetic-brake-board 2022-01-20