2/4 phase Nema 23 Stepper Motor Driver 24-50VDC 1.5A-4.5A 256 Microstep M542T High performance stepper driver for Nema 23 to Nema 34 motors Output current 1.5 - 4.5A Input voltage 24-50VDC Max. step resolutions 1/256 ideal solution for applications that require low-speed smoothness