... SR driver model Y3SSR8,60mm 3 phase step motor match with ME120N power supply , 86mm 3 phase step motor match with ME180N power supply ... ,3200,4000,5000,6400,51200 available,pulse+direction control mode2 motor size 60&86mm,length 54.5&76.5&66.5 ... method, the highest reaction frequency 2MHz.8 Error Protection: Error phase / open circuit protection Over voltage / under voltage/ over current protection ...